Relevant bibliographies by topics / Vitamin A deficiency

Academic literature on the topic 'Vitamin A deficiency'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Vitamin A deficiency"

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McDowell, L. R. "Vitamin nutrition of livestock animals: Overview from vitamin discovery to today." Canadian Journal of Animal Science 86, no. 2 (June 1, 2006): 171–79. http://dx.doi.org/10.4141/a05-057.

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The term “vitamin” or “vitamine” was first used in 1912. What later became known as vitamin deficiency diseases — scurvy, beriberi, night blindness and xeropthalmia — had plagued the world from antiquity. From 1900 through the 1930s, experiments with animals helped to advance knowledge of vitamins considerably. There are 15 vitamins of significance for livestock. A number of factors influence vitamin requirements and vitamin utilization, including physiological make-up and production function; confinement rearing without pasture; stress, disease and adverse environmental conditions; vitamin antagonists; use of antimicrobial drugs; and body vitamin reserves. Under commercial livestock and poultry production conditions, vitamin allowances higher than National Research Council (USA) requirements may be needed for optimum performance. Generally, the optimum vitamin supplementation level is the quantity that achieves the best growth rate, feed utilization and health (including immune competency), while also providing adequate body reserves. Key words: Vitamins, history, deficiency, requirements, supplementation
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Pusparini, Pusparini. "DEFISIENSI VITAMIN D TERHADAP PENYAKIT (Vitamin D Deficiency and Diseases)." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 21, no. 1 (April 15, 2018): 90. http://dx.doi.org/10.24293/ijcpml.v21i1.1265.

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It has been estimated that deficiency and insufficiency of Vitamin D affect one bilion people worldwide. Vitamin D deficiency can befound not only in countries with four (4) seasons, but also in countries with sunlight exposure all year long The objective of this studywas to know whether vitamin D deficiency can occur in Indonesia as well and to explore the role of vitamin D in people‘s health, althoughIndonesia is a country in the equator region. To avoid long term negative health consequences 25 hydroxyvitamin D/25 (OH) D serumlevel should be between 30 and 100 ng/mL. The main source of vitamin D is by synthesis at the skin which is exposed to ultraviolet Bradiation. The other source of vitamin D is from food. There are a lot of causes of vitamin D deficiency, for example: decreased vitaminD synthesis, nutritional intake of vitamin D, maternal vitamin D stores and exclusive breastfeeding, mal absorption and decreasedsynthesis or increased degradation of 25 (OH) D. From the above factors, decreased vitamin D synthesis is the main cause of vitamin Ddeficiency. The vitamin D deficiency is estimated and plays an important role in multiple disorders, such as: osteoporosis, fracture, cancer,cardiovascular disease, diabetes mellitus, autoimmune disease and infectious disease. A good strategy in managing vitamin D deficiencyis needed in order to solve the related problems.
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Fahad Aldaihani, Saad. "VITAMIN DEFICIENCY AND FOOD SUPPLEMENTS." International Journal of Advanced Research 9, no. 12 (December 31, 2021): 540–52. http://dx.doi.org/10.21474/ijar01/13941.

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Vitamins are a heterogeneous group of organic compounds that help ensure the human bodys wellbeing and function. This paper introduces the importance of all vitamins, both water-soluble and fat-soluble, as well as problems deriving from their deficiency. Additionally, vitamin supplements as part of treating vitamin deficiency, and possible harmful effects on the human body areshowcased. The main focus of the paper is on the vitamin B complex, and vitamin B12 specifically. The benefits of vitamin B12, as well as its action in the human body and the noxious effects of any lack of vitamin B12 in the human body, are also discussed. Some of the health conditionsan individual may need to face when they have vitamin B12 deficiency include neural tube defects, Alzheimers disease, depression, and megaloblastic anaemia, which are also introduced and further discussed, in terms of symptomatology, causes and suggested treatment. The toxicity of vitamin B12 is also introduced, and possible causes for vitamin B12 deficiency are showcased.
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MIHĂESCU, Victoria-Mădălina, Raluca-Ioana DASCĂLU, Andra Ioana NUȚĂ, and Luminița-Bianca GROSU. "DEFICIENCY AND TOXICITY OF VITAMINS." Annals of the Academy of Romanian Scientists Series of Medicine 4, no. 1 (2023): 38–48. http://dx.doi.org/10.56082/annalsarscimed.2023.1.38.

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Vitamins are substances necessary to sustain life, with many functions. Vitamins must be obtained from food, as they are either not made in the body at all or are not made in sufficient quantities for growth, vitality and wellbeing. Lack of a particular vitamin can lead to incomplete metabolism, fatigue and other important health problems. Deficiency of a vitamin causes symptoms which can be cured by that vitamin. Large doses of vitamins may slow or ever reverse diseases such as cancer, osteoporosis, nerve degeneration and heart disease.
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Varsamis, Nikolaos, Georgios A. Christou, Christos Derdemezis, Alexandros Tselepis, and Dimitrios Kiortsis. "The Associations of Dietary Vitamin K Intake and Circulating Vitamin 25(OH)D with Serum Lipoprotein Levels: The Vitamin Deficiency Matters." Hormone and Metabolic Research 55, no. 03 (February 27, 2023): 196–204. http://dx.doi.org/10.1055/a-2020-2080.

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AbstractA synergistic interplay between vitamins K and D appears to exist. We aimed to investigate for the first time whether the associations of dietary vitamin K intake and circulating 25(OH)D with serum lipoprotein levels are influenced by the existence of deficiency of either or both vitamins K and D. Sixty individuals [24 males, 36(18–79) years old] were examined. Vitamin deficiency of K1 and D were defined as vitamin K1 intake/body weight (BW)<1.00 μg/kg/day and circulating 25(OH)D<20 ng/ml, respectively. In individuals with vitamin K1 deficiency, the vitamin K1 intake/BW correlated positively with high density lipoprotein-cholesterol (HDL-C) (r=0.509, p=0.008) and negatively with serum triglycerides (TG) (r=–0.638, p=0.001), whereas circulating 25(OH)D correlated negatively with TG (r=–0.609, p=0.001). In individuals with vitamin D deficiency, the vitamin K1 intake/BW correlated positively with HDL-C (r=0.533, p=0.001) and negatively with TG (r=–0.421, p=0.009), while circulating 25(OH)D correlated negatively with TG (r=–0.458, p=0.004). The above-mentioned associations of vitamin K1 intake/BW and circulating 25(OH)D with serum lipoproteins were not detected in individuals without vitamin K1 deficiency or the ones without vitamin D deficiency. The vitamin K2 intake/BW correlated negatively with low density lipoprotein-cholesterol (LDL-C) (r=–0.404, p=0.001). In conclusion, the associations of vitamin K1 intake with TG and HDL-C and of circulating 25(OH)D with TG were more pronounced in individuals with deficiency of either or both vitamins K1 and D. Increased dietary vitamin K2 intake was associated with decreased LDL-C.
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Lakho, Arshad Sattar, Aqeel Ahmed Channa, Abdul Ghaffar Dars, Syed Zulfiquar Ali Shah, and Muhammad Iqbal. "VITAMIN B12 DEFICIENCY." Professional Medical Journal 25, no. 05 (May 7, 2018): 753–58. http://dx.doi.org/10.29309/tpmj/18.4438.

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Butt, Maleeha Tahir, Amber Shami, Waqas Qarshi, Raheela Shaheen, Zarrin Khaliq Chaudari, and Mehak Shafiq. "Vitamin D Deficiency as Etiological Factor for Breast Cancer." Pakistan Journal of Medical and Health Sciences 16, no. 8 (August 30, 2022): 836–38. http://dx.doi.org/10.53350/pjmhs22168836.

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Aim: To determine the association between vitamin D deficiency and breast cancer. Material and methods: This study was conducted on 72 participants, 36 cases and 36 healthy controls were enrolled. Basic demographic information was recorded. Vitamins D deficiency was assessed between both groups. Serum Vitamin D level < 20 ng/ml was considered as vitamin D deficient. Results: Mean age in the cases was 34.64±9.14 years and 36.22±8.78 years in controls. Significant association was found between vitamins D deficiency and breast cancer. In cases there 28 (77.7%) patients with vitamin D deficient and in controls 15 (41.7%) patients. Conclusion: Vitamin D deficiency is a major risk factor for breast cancer.
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Khrulev, Aleksej E., Alina N. Baykina, Natal’ya A. Shiyanova, Anna Yu Sirotkina, Ol’ga Yu Salokhina, and Vera N. Grigorieva. "Status of water-soluble vitamins and neurological disorders in dialysis patients." Neurology Bulletin LII, no. 1 (June 23, 2020): 55–59. http://dx.doi.org/10.17816/nb17771.

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The deficit of vitamins in patients receiving the long-term hemodialysis is discussed in the modern literature. Vitamin deficiency in a dialysis patient can be explained by the peculiarity of the diet recommendations, the need to take a number of medications, impaired absorption of vitamins in the digestive tract, poor appetite, uremic anorexia, depression, limited ability to buy and cook food, as well as losses of vitamins during the procedure of program hemodialysis. An analytical review of current (2011 and later) publications containing a comprehensive analysis of data on the status of water-soluble vitamins and its role in the development of neurological disorders in dialysis patients is provided. There is a high risk of deficiency of various water soluble vitamins and neurological disorders, such as vitamin B1 deficiency and thiamine deficiency encephalopathy and polyneuropathy, vitamin B6 deficiency and pyridoxine deficiency polyneuropathy, folic acid metabolism disorders, as well as vitamin B12 and the development of hyperhomocysteinemia, cognitive and depressive disorders, strokes, restless legs syndrome and dialysis polyneuropathy among the patients with end-stage chronic kidney disease and program hemodialysis. Vitamin C deficiency and the development of severe asthenic syndrome with insomnia and depression are described in dialysis patients. It seems necessary to revise the traditional nutritional approaches to the dialysis patients based on the analysis of the literature. Special attention is paid to the possible addition of such water-soluble vitamins as B1, B6, B9, B12 and C. Timely diagnosis of vitamin deficiency conditions and neurological disorders in patients on program hemodialysis, the development of methods for their correction and their introduction into clinical practice would improve the life expectancy and quality of life of dialysis patients.
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Abeer Talib Abdulqader. "Effects of vitamin deficiency (A, C and D) in maternal on the weights of newborns." Tikrit Journal of Pure Science 23, no. 1 (April 1, 2018): 9–12. http://dx.doi.org/10.25130/tjps.v23i1.472.

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The present study was designed to find the relation between vitamin deficiency (A, C and D) of maternal and the weights of newborns. The study used 50 volunteers (40 pregnant women with vitamins deficiency and 10 pregnant women without vitamins deficiency). Pregnant women were divided to two groups according to vitamins state. Newborn weights directly were reported at birth time. Vitamins levels showeddecreased invitamin A, vitamin C and vitamin D in 40 pregnant female and normal in 10 pregnant female. Where, Vitamins levels showedsignificant decreased (P<0.05) 40 pregnant female 10 pregnant femalecompared with 10 normal pregnant female. Also, results show a high correlation between decreased vitamins levels and newborn weights. It was concluded from this study that the vitamins deficiency (A, C and D) in maternal led to decreased the weights of newborn.
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Gray, Brenda. "Vitamin Deficiency." Science News 159, no. 8 (February 24, 2001): 115. http://dx.doi.org/10.2307/3981595.

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Dissertations / Theses on the topic "Vitamin A deficiency"

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Гордіна, Марина Андріївна, Марина Андреевна Гордина, and Maryna Andriivna Hordina. "Vitamin D deficiency and coronary heart disease." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/33551.

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Coronary heart disease (CHD) is the result of the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium with oxygen and nutrients. The WHO estimated that in 2002, 12.6% of deaths worldwide were from CHD. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/33551
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Rashed, Ismail Ismail Ibrahim. "The association between vitamin D deficiency and tuberculosis : Effects of different levels of vitamin D deficiency - A meta-analysis." Thesis, Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-38922.

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Aim: To conduct a systematic review and meta-analysis of all published studies studying the risk of vitamin D deficiency in tuberculosis patients and in healthy controls. Additionally, subgroup meta-analysis was performed based on the level of vitamin D to test the risk in TB groups and in healthy groups. Methods: Pubmed was searched for observational studies in human and English that discussed the association between risk of low serum vitamin D and TB. Meta-analysis was performed on all relevant studies combined and for subgroups of each vitamin D level. Results: 22 studies were selected and pooled in the analysis. The results were consistent with previous studies examining the same risk. The overall log risk ratio (log RR) of low vitamin D was significantly higher in TB patients 1.68 times than healthy controls. In 4 subgroup meta- analyses based on vitamin D level below (20 nmol/L, 30 nmol/L, 50 nmol/L, and 75 nmol/L), the risk of having low vitamin D in TB patients was (1.82, 2.89, 1.38, 1.32) respectively. That subgroup analysis showed more clearly the higher RR were below 20 and 30 nmol/L. The smallest RR was at 75 nmol/L level. Conclusion: This study verified the association between risk of low vitamin D level and TB development. It also clarified that, the risk increased by decreasing vitamin D level.
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Smith, Pamela Joy. "Vitamin D deficiency in three northern Manitoba communities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0025/NQ51667.pdf.

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Barron, Mary Anne. "Vitamin K deficiency in paediatric bone marrow transplantation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0008/MQ40822.pdf.

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Zhang, Xueming. "Vitamin D receptor deficiency and postnatal tooth formation." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. http://www.mhsl.uab.edu/dt/2007m/zhang.pdf.

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Lima, Geania de Sousa Paz 1962. "Deficiência de vitamina A em gestantes adolescentes e seus recém-nascidos : um estudo prospectivo." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313081.

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Orientadores: Sílvia de Barros Mazon, Eliana Cotta de Faria
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
Made available in DSpace on 2018-08-26T00:14:21Z (GMT). No. of bitstreams: 1 Lima_GeaniadeSousaPaz_D.pdf: 1892670 bytes, checksum: 9f00c67f378ca5aa059a0979ca769768 (MD5) Previous issue date: 2014
Resumo: A alta incidência de gravidez na adolescência e a maior vulnerabilidade desse grupo às deficiências nutricionais são fatos bem documentados. Todavia, a deficiência de vitamina A (DVA), que é considerada problema de saúde pública em países em desenvolvimento, não tem sido devidamente investigada nesse grupo de risco. O presente estudo caracterizou o estado nutricional relativo à vitamina A em gestantes adolescentes e seus recém-nascidos, segundo indicadores dietético, funcional e bioquímico, em um grupo assistido em maternidade escola de Teresina-PI. Inicialmente, 151 gestantes adolescentes sem enfermidades diagnosticadas no período pré-gestacional, não fumantes, na faixa etária de 10 a 19 anos, com 20 semanas ou menos de gestação, sem uso de suplementos vitamínico-minerais contendo vitamina A, aceitaram participar do estudo. Permaneceram até o final 126 gestantes, que foram investigadas quanto às condições socioeconômicas, obstétricas e aos indicadores funcional e dietético. Para identificar a presença de cegueira noturna (XN), no início e final da gravidez, utilizou-se entrevista proposta pela OMS. Para o inquérito alimentar, foram aplicados 03 recordatórios de 24 horas, sendo um no primeiro contato com a gestante (até a 20ª semana de gestação), outro entre a 20ª e 30ª semana e o terceiro após a 30ª semana. Para a avaliação bioquímica da DVA, 89 gestantes tiveram duas amostras sanguíneas seriadas (uma antes da 20ª semana gestacional e outra no pré-parto) e pareadas com as dos recém-nascidos (cordão umbilical). As concentrações séricas de retinol foram determinadas por cromatografia líquida de alta eficiência (CLAE) e o ponto de corte utilizado para caracterizar DVA foi ? 20µg/dL (OMS, 2009). A análise de associação entre as variáveis categóricas foi realizada pelo teste qui-quadrado ou exato de Fisher. A comparação entre variáveis contínuas para amostras pareadas foi realizada pelo teste de Wilcoxon, para amostras não pareadas pelo teste de Mann-Whitney e as análises de correlação pelo teste de Spearman. O nível de significância adotado foi p < 0,05. Os resultados demostraram alta frequência de DVA no grupo estudado, observando-se consumo inadequado de vitamina A em 64% das gestantes; presença de XN (no inicio ou final da gestação) em 13% e concentrações séricas de retinol ? 20µg/dL em 35% das gestantes no início da gestação, evoluindo para 52% no pré-parto. A grande maioria dos recém-nascidos, 95%, apresentou níveis de retinol ? 20µg/dL, observando-se correlação moderada entre as concentrações de retinol materno e do recém-nascido. Considerando o impacto da DVA na saúde da mãe e de seu filho e a alta frequência dessa deficiência observada no presente estudo, ressalta-se a necessidade de avaliação regular do estado nutricional de vitamina A durante o pré-natal do adolescente, a fim de realizar o diagnóstico precoce e tratamento desta deficiência nutricional
Abstract: The high incidence of pregnancy in adolescence and the greater vulnerability of this group to nutritional deficiencies are well documented facts. However, vitamin A deficiency (VAD), which is considered a public health problem in developing countries, has not been sufficiently investigated in pregnant adolescents yet. This study characterizes the nutritional status of vitamin A in pregnant adolescents and in their newborns ¿ both attending a Brazilian public maternity hospital located in Teresina-PI ¿ through functional, dietary and biochemical indicators. Initially, the study included 151 pregnant adolescents who agreed to participate, non-smokers, aged 10-19 years, were at 20 weeks of gestation or less and weren¿t under any kind of treatment with vitamin-mineral supplement containing vitamin A. Until the end of this study, the number of participants reduced to 126 pregnant adolescents, who were investigated in terms of socioeconomic, obstetric and functional indicators, and dietary conditions. The functional indicator, night blindness (XN), was identified at the beginning and at the end of pregnancy; for the dietary survey, three 24 h dietary recalls (R24 h) were applied at intervals ? 5 weeks, and for biochemical assessment of VAD, 89 pregnant adolescents had two serial blood samples collection (one before the 20th gestational week and another at prepartum) paired with their newborns¿ ones. Serum retinol concentrations were determined by high performance liquid chromatography (HPLC) and the cutoff point used to characterize VAD was ? 20?g/dL (WHO, 2009). The analysis of association between categorical variables was performed using chi-square or Fisher's exact test; comparisons of continuous variables between unpaired groups were analyzed by Mann¿Whitney test, and between paired groups by Wilcoxon test; correlation analysis were done by Spearman¿s test. The level of significance was p <0.05. Results showed high occurrence of VAD in the group studied; inadequate intake of vitamin A was observed in 64% of pregnant adolescents; presence of XN (at the beginning or end of pregnancy) in 13%, and retinol concentrations ? 20?g/dL in 35% of the adolescents at the beginning of pregnancy, increasing to 52% at the end. The vast majority of newborns, 95%, had serum retinol ? 20?g/dL, and it was observed moderate correlation between the levels of maternal and newborn retinol. Considering the impact of VAD on health of the adolescent mother-newborn pair, the high prevalence observed in this study emphasizes the need for regular evaluation of the nutritional status of vitamin A during prenatal care of the adolescent, in order to accomplish early diagnosis and treatment of this nutritional deficiency
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Ciencias Biomedicas
Doutora em Ciências Médicas
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Li, Ling, and 李玲. "Review of vitamin D deficiency among breast-feeding infants." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48424213.

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Background Vitamin D deficiency is prevalent in many places across the world. Breastfeeding has been suggested to be a significant predictor of vitamin D deficiency during infancy, which is preventable through proper supplementation. However, whether Hong Kong should adopt the international recommendation for supplementation of exclusive breastfed infants is still not yet answered. Objective: To review the available evidence regarding the association between breastfeeding and vitamin D deficiency during infancy, as well as the effectiveness of vitamin D supplementation of breastfed infants as an intervention measure. Methods A total of 5112 potentially relevant articles were searched and identified from MEDLINE (OVID, Pubmed), Science Citation Index Expanded (ISI Web of Science), Cochrane Central Register of Controlled Trials, EMBASE, and Cumulative Index to Nursing and Allied Health Literature (CINAHL) and Chinese database (CNKI) without restriction from inception to July-06-2012. 5065 articles were excluded after the initial scanning of title and abstracts. 36 were subsequently excluded due to methodological issues. A total of 11 studies were included and reviewed by two independent reviewers. Results This review pooled together a total of 1126 exclusively breast-fed infants for less than one year old from 11 studies. The pooled average prevalence of vitamin D deficiency was 54.2%. The association between breastfeeding and vitamin D deficiency during infancy has been reported consistently, and it was found to be one of the strongest predictors of vitamin D deficiency for infants less than one year old. Sunlight exposure, season, and skin pigmentation were also found to be important affecting factors. Supplementation to breastfed infants with the dosages as recommended by American Academy of Pediatrics (AAP) seem to be effective in lifting up the vitamin D levels. Conclusions The Hong Kong Government and relevant health sectors should conduct local epidemiological study to investigate the problem of concern among our breast-fed infants, and seriously consider or evaluate the AAP recommendation of supplementation.
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Public Health
Master
Master of Public Health
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Nolan, Maeve Roisin. "Studies of vitamin E and selenium deficiency in pigs." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239214.

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Ahmed, Faruk. "The interaction of vitamin A deficiency and rotavirus infection." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327774.

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Mogusu, Eunice, Shimin Zheng, Sreenivas P. Veeranki, D. Kioko, and Megan Quinn. "Association of Vitamin D Deficiency with High Cholesterol Levels." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/104.

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Background Recent studies have demonstrated a significant relationship between vitamin D and cholesterol levels. Cholesterol is important in the synthesis and metabolism of vitamin D. Additionally, foods rich in vitamin D also contain high cholesterol supplements. Given that sources of vitamin D and cholesterol are different, we hypothesized that there is a potential mean bias in true relationship between an individual’s vitamin D and cholesterol levels. The study therefore aimed to examine the relationship of serum cholesterol and vitamin D levels. Methods We utilized NHANES 2001-2006 data (n=30,954). The outcome was vitamin D deficiency defined as individuals with serum 25-hydroxyvitamin D level12 ng/ml were classified as normal. Significant differences in cholesterol levels between the two groups were determined using Chi-Square contingency test. Generalized linear models were conducted to assess the association of vitamin D deficiency with cholesterol levels adjusting for age, sex, physical activity (proxy measure for sunlight exposure) and other serum lipid levels. Results Vitamin D deficiency was significantly lower in males(5.2%) than females(7.8%)(P Conclusion Vitamin D deficiency was associated with high LDL and triglyceride levels. Study findings help establish the importance of distinguishing vitamin D and cholesterol levels as separate entities while making inferences about their relationship with chronic diseases.
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Books on the topic "Vitamin A deficiency"

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Victor, Herbert, ed. Vitamin B12 deficiency. London: Royal Society of Medicine Press, 1999.

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Clemetson, C. Alan B. Vitamin C. Boca Raton, Fla: CRC Press, 1989.

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Clemetson, C. Alan B. Vitamin C. Boca Raton, Florida: CRC Press, 1989.

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Clemetson, C. Alan B. Vitamin C. Boca Raton, Fla: CRC Press, 1989.

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Clemetson, C. Alan B. Vitamin C. Boca Raton, Fl: CRC Press, 1989.

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Clemetson, C. Alan B. Vitamin C. Boca Raton, Florida: CRC Press, 1989.

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Malone, Stephanie R. Vitamin D: Nutrition, side effects, and supplements. Hauppauge, N.Y: Nova Science, 2010.

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UNICEF. Global prevalence of vitamin A deficiency. Geneva, Switzerland: World Health Organization, 1995.

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Christopher, Bauernfeind J., ed. Vitamin A deficiency and its control. Orlando: Academic Press, 1986.

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P, West Keith, ed. Vitamin A deficiency: Health, survival, and vision. New York: Oxford University Press, 1996.

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Book chapters on the topic "Vitamin A deficiency"

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Serratrice, Jacques. "Vitamin Deficiency." In International Neurology, 401–7. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444317008.ch107.

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Laskaris, George, and Crispian Scully. "Vitamin Deficiency." In Periodontal Manifestations of Local and Systemic Diseases, 283–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55596-1_28.

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McKenna, Malachi J., and Barbara Murray. "Vitamin D Deficiency." In Endocrinology and Diabetes, 293–304. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8684-8_23.

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Valk, Jacob, and Marjo S. van der Knaap. "Vitamin B12 Deficiency." In Magnetic Resonance of Myelin, Myelination, and Myelin Disorders, 263–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-02568-0_41.

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Gordon, Rebecca J. "Vitamin D Deficiency." In Endocrine Conditions in Pediatrics, 323–26. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52215-5_54.

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West, Keith P., and Ian Darnton-Hill. "Vitamin A Deficiency." In Nutrition and Health in Developing Countries, 377–433. Totowa, NJ: Humana Press, 2008. http://dx.doi.org/10.1007/978-1-59745-464-3_13.

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Davila, Jennifer, and Maria C. Velez-Yanguas. "Vitamin B12 Deficiency." In Hematology in the Adolescent Female, 195–201. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48446-0_18.

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Campagnoli, Thalmon R., and William E. Smiddy. "Vitamin A Deficiency." In Manual of Retinal Diseases, 611–14. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20460-4_118.

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Palmer, Amanda C., Ian Darnton-Hill, and Keith P. West. "Vitamin A Deficiency." In Nutrition and Health in a Developing World, 181–234. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-43739-2_9.

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Mehlhorn, Heinz. "Vitamin A Deficiency." In Encyclopedia of Parasitology, 3022. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4393.

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Conference papers on the topic "Vitamin A deficiency"

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Al Thani, Sharifa, Munass Mohammed, and Hanaa Ahmed. "Factors associated with Vitamin D Deficiency in Women: Lesson from Biobank in Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0190.

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Background: Vitamin D deficiency is affecting the health of humans around the world, and different factors associated with it were studied among different populations. Vitamin D deficiency was studied more often as a predictor to diseases. However, certain factors that could be associated with vitamin D deficiency were not explored among women, specifically in Qatar. Objective: To explore potential risk factors of vitamin D deficiency among women aged 20 to 65, using a sample of records from women volunteers to Qatar Biobank. Hypothesis: The study potential factors (age, BMI, education, income, milk consumption, occupation, pregnancy, physical activity and soft drinks) are associated with vitamin D deficiency. Methodology: We assessed some potential risk factors to vitamin D deficiency using data from Qatar Biobank (n=1000). Women aged 20-65 years old were included in the study. Univariate and multiple logistic regression models were used to model the association between our study potential factors (age, BMI, education, income, milk consumption, occupation, number of children, physical activity, and soft drinks) and being vitamin D deficient. Analysis was conducted using Stata (IC) version 15.0. Results: 654 women out of 1000 had vitamin D deficiency (serum level<20ng/mL), and 346 women that had normal level of vitamin D (serum level>20ng/mL). Vitamin D deficiency was significantly associated with women who drank soda 1-3 per month (p-value= 0.038) and 1-3 per week or more (p-value= 0.021). Also, women who were 41-50 years old (p-value= 0.006), 50 years and older (p-value= 0.000) and women who were students as their occupation (p-value= 0.003). Conclusion: Vitamin D deficiency was common among women in Qatar, as found in the present study. Students, women who drank soda, and younger age (<50) had the highest vitamin D deficiency
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Nagao, T., Y. Hanawa, K. Sawada, I. Tsukimoto, I. Ikeda, M. Komazawa, K. Shiraki, et al. "THE VITAMIN K DEFICIENCY IN INFANCY IN JAPAN -- THE SECOND NATIONWIDE SURVEY." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644263.

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Questionnaires were sent to 1,218 hospitals with more than 200 beds, in order to know the incidence of hemorrhagic disease due to vitamin K deficiency in infancy beyond 2 weeks after birth, during 4 and a half years, i.e. from January 1981 to June 1985. Out of the 534 cases reported, 407 had no obvious reasons for vitamin K deficiency: "idiopathic vitamin K deficiency in infancy". Other 68 cases had bleedingepisodes due to vitamin K deficiency associated with hepatobiliary lesions (e.g.congenital bile duct atresia), chronic diarrhea, long term antibiotic therapy and so on: "secondary vitamin K deficiencyin infancy". The third group consisting of 59 cases was so called "near miss" type, in which hemorrhagic tendency was discovered at the time of mass screening tests for vitamin K deficiency or by chance withoutany clinical hemorrhage. In the idiopatic group, 345 cases (84.8%) developed their bleeding episodes between 21 and 59 days of age, and 368 cases (90.4%) were wholly breast-fed. Intracranial hemorrhage was seen in 338 cases (83.0%) of this group. In most cases of this series (97.3%),no vitamin K was supplemented after birth. Administration of vitamin K is an urgent routine procedure during the first one or two months of life for all newbornbabies, although the incidence of the idiopathic vitamin K deficiency in infancyhas not decreased significantly comparedto the results of the first nation-wide survey (Jan. 1978 - Dec. 1980). This study was sponsored by the Ministry of Health and Welfare of Japan.
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Omotosho, Oluyinka, Yetunde Akinwale, and Adedoyin Idris. "Semantic Based Vitamin Deficiency Monitoring System." In ICSCA 2020: 2020 9th International Conference on Software and Computer Applications. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3384544.3384598.

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Chaithanya, T. Krishna, Jiniya Gupta, and M. S. Roobini. "Vitamin Deficiency Detection Using Neural Networks." In 2024 International Conference on Wireless Communications Signal Processing and Networking (WiSPNET). IEEE, 2024. http://dx.doi.org/10.1109/wispnet61464.2024.10533044.

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Bellocchia, Michela, Monica Boita, Filippo Patrucco, Cinzia Ferrero, Giulia Verri, Daniela Libertucci, Francesco Coni, Giuseppe Tabbia, Alessio Mattei, and Caterina Bucca. "Vitamin D deficiency and COPD exacerbations: Effect of vitamin D supplementation." In Annual Congress 2015. European Respiratory Society, 2015. http://dx.doi.org/10.1183/13993003.congress-2015.pa3961.

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Filipovic, Snezana, Vucinic Violeta, Videnovic Jelica, Stjepanovic Mihailo, and Jandric Aleksandar. "Vitamin D deficiency and activity of sarcoidosis." In ERS International Congress 2016 abstracts. European Respiratory Society, 2016. http://dx.doi.org/10.1183/13993003.congress-2016.pa827.

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Koldobskiy, Dafna, Giora Netzer, Sachin Patel, and Avelino Verceles. "Vitamin D Deficiency In Chronically Ventilated Patients." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a3094.

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Quiles, K., F. Z. Shao, E. Johnson, and F. Chen. "Vitamin A Deficiency and the Lung Microbiome." In American Thoracic Society 2020 International Conference, May 15-20, 2020 - Philadelphia, PA. American Thoracic Society, 2020. http://dx.doi.org/10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a7442.

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Al-Lebawy, Noor Sami, Hedaa M. Nahab, and Nuha Mohammed Mousa. "Relationship between vitamin d deficiency and tuberculosis." In PROCEEDING OF THE 1ST INTERNATIONAL CONFERENCE ON ADVANCED RESEARCH IN PURE AND APPLIED SCIENCE (ICARPAS2021): Third Annual Conference of Al-Muthanna University/College of Science. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0094453.

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Kumar, Toshita, Ali Sadoughi, Nina Kohn, Rebecca Miller, Twinkle Chandak, and Arunabh Talwar. "Vitamin D Deficiency In Advanced Lung Disease." In American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado. American Thoracic Society, 2011. http://dx.doi.org/10.1164/ajrccm-conference.2011.183.1_meetingabstracts.a2346.

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Reports on the topic "Vitamin A deficiency"

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Hansen, Natasha. Vitamin D Deficiency in Athletes. Ames (Iowa): Iowa State University, January 2019. http://dx.doi.org/10.31274/cc-20240624-1591.

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Rosero, A., J. García, and J. Morelo. Varietal selection of high beta-carotene cassava genotypes adapted to dry and humid Caribbean Region of Colombia. Corporación colombiana de investigación agropecuaria - AGROSAVIA, 2018. http://dx.doi.org/10.21930/agrosavia.poster.2018.6.

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Cassava (Manihot esculenta Crantz) is a four staple crop for human consume worldwide after rice, wheat and corn. Mainly, it is used as energetic source due high carbohydrate content; however, improvement of its nutritional quality can contribute to food security, especially in vulnerable region as Caribe, where several factors have threaten with nutritional balance in children. In Colombia, close to of children are born with a birth weight of less than 2,500 grams, which is one of the main risk factors for the mortality of newborns. In children less than 5 years old, 43,3% has zinc deficiency, 24,3% has A vitamin deficiency and 10,6 has Iron deficiency
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Singh, Ruchi, Akhiya Nail, and Nirendra Kumar Rai. Effectiveness of Vitamin B12 Supplementation on cognitive, motor & mood instability of Parkinson’s disease patients on levodopa treatment :A Systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, February 2023. http://dx.doi.org/10.37766/inplasy2023.2.0066.

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Review question / Objective: The treatment of choice for patients of Parkinson's disease is levodopa. However, levodopa has been suggested to decrease Vit B12 level in these patients. Thus, the research question for this systematic review is whether vit B 12 supplementation in Parkinson's disease(PD) patients on treatment with levodopa improves vit B12 level effecting the Cognition, Motor functions and Mood instability among them in comparison to PD patients on levodopa treatment who are not supplemented with Vit B12. Condition being studied: Parkinson disease is the progressive degeneration of dopaminergic neurons present within the substantia nigra that can lead to altered movements along with the prevalence of cognitive and mood instability as a result of dopamine(neurotransmitter) deficiency. The most effective treatment for the Parkinson's disease is the administration of levodopa, a dopamine precursor . Long term treatment with levodopa causes an increase in homocysteine levels and tissue deficiency of vitamin B12 and folate may occur. Vitamin B12 supplementation is administered as after management regime, in Parkinson patient on levodopa treatment . This study aims to conduct a systematic review, of studies , randomized control trials investigating the ability of vitamin B12 supplementation to enhances the recovery/reduce the decline, if any, of the symptoms of cognitive, motor, mood impairments associated with Parkinson's disease patient on levodopa treatment.
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Shi, Shanzhen, Jiaxing Feng, Yu Li, and Huaxiu Shi. Risk factors for vitamin D deficiency in inflammatory bowel disease: a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2020. http://dx.doi.org/10.37766/inplasy2020.6.0028.

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Laird, Eamon, and Rose Anne Kenny. Vitamin D deficiency in Ireland – implications for COVID-19. Results from the Irish Longitudinal Study on Ageing (TILDA). The Irish Longitudinal Study on Ageing, April 2020. http://dx.doi.org/10.38018/tildare.2020-05.

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Poverenov, Elena, Tara McHugh, and Victor Rodov. Waste to Worth: Active antimicrobial and health-beneficial food coating from byproducts of mushroom industry. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7600015.bard.

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Background. In this proposal we suggest developing a common solution for three seemingly unrelated acute problems: (1) improving sustainability of fast-growing mushroom industry producing worldwide millions of tons of underutilized leftovers; (2) alleviating the epidemic of vitamin D deficiency adversely affecting the public health in both countries and in other regions; (3) reducing spoilage of perishable fruit and vegetable products leading to food wastage. Based on our previous experience we propose utilizing appropriately processed mushroom byproducts as a source of two valuable bioactive materials: antimicrobial and wholesome polysaccharide chitosan and health-strengthening nutrient ergocalciferol⁽ᵛⁱᵗᵃᵐⁱⁿ ᴰ2⁾. ᴬᵈᵈⁱᵗⁱᵒⁿᵃˡ ᵇᵉⁿᵉᶠⁱᵗ ᵒᶠ ᵗʰᵉˢᵉ ᵐᵃᵗᵉʳⁱᵃˡˢ ⁱˢ ᵗʰᵉⁱʳ ᵒʳⁱᵍⁱⁿ ᶠʳᵒᵐ ⁿᵒⁿ⁻ᵃⁿⁱᵐᵃˡ ᶠᵒᵒᵈ⁻ᵍʳᵃᵈᵉ source. We proposed using chitosan and vitamin D as ingredients in active edible coatings on two model foods: highly perishable fresh-cut melon and less perishable health bars. Objectives and work program. The general aim of the project is improving storability, safety and health value of foods by developing and applying a novel active edible coating based on utilization of mushroom industry leftovers. The work plan includes the following tasks: (a) optimizing the UV-B treatment of mushroom leftover stalks to enrich them with vitamin D without compromising chitosan quality - Done; (b) developing effective extraction procedures to yield chitosan and vitamin D from the stalks - Done; (c) utilizing LbL approach to prepare fungal chitosan-based edible coatings with optimal properties - Done; (d) enrichment of the coating matrix with fungal vitamin D utilizing molecular encapsulation and nano-encapsulation approaches - Done, it was found that no encapsulation methods are needed to enrich chitosan matrix with vitamin D; (e) testing the performance of the coating for controlling spoilage of fresh cut melons - Done; (f) testing the performance of the coating for nutritional enhancement and quality preservation of heath bars - Done. Achievements. In this study numerous results were achieved. Mushroom waste, leftover stalks, was treated ʷⁱᵗʰ ᵁⱽ⁻ᴮ ˡⁱᵍʰᵗ ᵃⁿᵈ ᵗʳᵉᵃᵗᵐᵉⁿᵗ ⁱⁿᵈᵘᶜᵉˢ ᵃ ᵛᵉʳʸ ʰⁱᵍʰ ᵃᶜᶜᵘᵐᵘˡᵃᵗⁱᵒⁿ ᵒᶠ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2, ᶠᵃʳ ᵉˣᶜᵉᵉᵈⁱⁿᵍ any other dietary vitamin D source. The straightforward vitamin D extraction procedure and ᵃ ˢⁱᵐᵖˡⁱᶠⁱᵉᵈ ᵃⁿᵃˡʸᵗⁱᶜᵃˡ ᵖʳᵒᵗᵒᶜᵒˡ ᶠᵒʳ ᵗⁱᵐᵉ⁻ᵉᶠᶠⁱᶜⁱᵉⁿᵗ ᵈᵉᵗᵉʳᵐⁱⁿᵃᵗⁱᵒⁿ ᵒᶠ ᵗʰᵉ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2 ᶜᵒⁿᵗᵉⁿᵗ suitable for routine product quality control were developed. Concerning the fungal chitosan extraction, new freeze-thawing protocol was developed, tested on three different mushroom sources and compared to the classic protocol. The new protocol resulted in up to 2-fold increase in the obtained chitosan yield, up to 3-fold increase in its deacetylation degree, high whitening index and good antimicrobial activity. The fungal chitosan films enriched with Vitamin D were prepared and compared to the films based on animal origin chitosan demonstrating similar density, porosity and water vapor permeability. Layer-by-layer chitosan-alginate electrostatic deposition was used to coat fruit bars. The coatings helped to preserve the quality and increase the shelf-life of fruit bars, delaying degradation of ascorbic acid and antioxidant capacity loss as well as reducing bar softening. Microbiological analyses also showed a delay in yeast and fungal growth when compared with single layer coatings of fungal or animal chitosan or alginate. Edible coatings were also applied on fresh-cut melons and provided significant improvement of physiological quality (firmness, weight ˡᵒˢˢ⁾, ᵐⁱᶜʳᵒᵇⁱᵃˡ ˢᵃᶠᵉᵗʸ ⁽ᵇᵃᶜᵗᵉʳⁱᵃ, ᵐᵒˡᵈ, ʸᵉᵃˢᵗ⁾, ⁿᵒʳᵐᵃˡ ʳᵉˢᵖⁱʳᵃᵗⁱᵒⁿ ᵖʳᵒᶜᵉˢˢ ⁽Cᴼ2, ᴼ²⁾ ᵃⁿᵈ ᵈⁱᵈ not cause off-flavor (EtOH). It was also found that the performance of edible coating from fungal stalk leftovers does not concede to the chitosan coatings sourced from animal or good quality mushrooms. Implications. The proposal helped attaining triple benefit: valorization of mushroom industry byproducts; improving public health by fortification of food products with vitamin D from natural non-animal source; and reducing food wastage by using shelf- life-extending antimicrobial edible coatings. New observations with scientific impact were found. The program resulted in 5 research papers. Several effective and straightforward procedures that can be adopted by mushroom growers and food industries were developed. BARD Report - Project 4784
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Cordero Cordero, Carina Cecilia, Yanine Rozo Leguizamón, Pablo Julián Tamayo Molano, Rafael de Oro Aguado, and Germán Salgado. Características varietales y desempeño agronómico de la variedad de fríjol biofortificado Corpoica Rojo 43 en el Caribe seco colombiano. Corporación colombiana de investigación agropecuaria - AGROSAVIA, 2018. http://dx.doi.org/10.21930/agrosavia.folleto.2018.2.

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Las leguminosas en general, y especialmente el fríjol común, constituyen fuentes importantes de proteínas, vitaminas y minerales (Ulloa, Rosas, Ramírez, & Ulloa, 2011). Aunque las vitaminas y minerales son requeridos en el cuerpo humano en bajas cantidades, existe en el país, y en el mundo, una gran problemática ligada a las enfermedades que se derivan del bajo consumo de vitamina A, hierro y zinc en niños y adultos. Algunas de estas afecciones son infecciones recurrentes, raquitismo, deficiencia visual, retraso en el crecimiento y bajo aprendizaje. De acuerdo con la OMS, para un buen funcionamiento del cuerpo humano el aporte recomendado en la dieta es 11 mg/día de Zn para hombres adultos, 8 mg/día para mujeres adultas y 60 mg/día de hierro para adolescentes y mujeres en edad fértil (Ministerio de Salud Protección Social [Minsalud], 2015). La inclusión de fríjoles biofortificados en la dieta representaría un posible aporte nutricional de 18,5 mg/persona-día de hierro y 3,5 de zinc mg/persona-día, a partir de raciones de 100 g (Tofiño-Rivera, Melo, Ruidiaz, & Lissbrant, 2015). Esto significa que el consumo de 200 g diarios de fríjol biofortificado Corpoica Rojo 43 supliría la mitad de los aportes de hierro y zinc sugeridos para una dieta saludable (Minsalud, 2015).
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Treating vitamin D deficiency may reduce exacerbations of COPD. National Institute for Health Research, February 2019. http://dx.doi.org/10.3310/signal-000737.

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Training of Trainers (ToT) Provitamin A Maize: A Biofortified Solution for Vitamin A Deficiency. Facilitator’s Guide. International Potato Center, 2018. http://dx.doi.org/10.4160/9789290604990.

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Training of Trainers (ToT) Provitamin A Maize: A Biofortified Solution for Vitamin A Deficiency. Participant’s Guide. International Potato Center, 2018. http://dx.doi.org/10.4160/9789290605003.

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