Gotowe bibliografie tematyczne / Dairy microbiology

Gotowa bibliografia na temat „Dairy microbiology”

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Data publikacji: 4 czerwca 2021
Data aktualizacji: 27 lipca 2024

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Artykuły w czasopismach na temat "Dairy microbiology"

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Messer, James W. "Dairy Microbiology". Journal of AOAC INTERNATIONAL 71, nr 1 (1.01.1988): 102. http://dx.doi.org/10.1093/jaoac/71.1.102.

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Messer, James W. "Dairy Microbiology". Journal of AOAC INTERNATIONAL 72, nr 1 (1.01.1989): 101. http://dx.doi.org/10.1093/jaoac/72.1.101a.

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Jelen, P. "Applied dairy microbiology". International Dairy Journal 10, nr 8 (styczeń 2000): 586. http://dx.doi.org/10.1016/s0958-6946(00)00079-0.

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Bishop, J. Russell. "Food Microbiology—Dairy". Journal of AOAC INTERNATIONAL 75, nr 1 (1.01.1992): 128. http://dx.doi.org/10.1093/jaoac/75.1.128a.

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Bishop, J. Russell. "Food Microbiology—Dairy". Journal of AOAC INTERNATIONAL 76, nr 1 (1.01.1993): 153–54. http://dx.doi.org/10.1093/jaoac/76.1.153.

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Bishop, J. Russell. "Food Microbiology (Dairy)". Journal of AOAC INTERNATIONAL 77, nr 1 (1.01.1994): 186–87. http://dx.doi.org/10.1093/jaoac/77.1.186a.

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Bishop, J. Russell. "Food Microbiology—Dairy". Journal of AOAC INTERNATIONAL 78, nr 1 (1.01.1995): 181–82. http://dx.doi.org/10.1093/jaoac/78.1.181.

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Bishop, J. Russell. "Food Microbiology–Dairy". Journal of AOAC INTERNATIONAL 79, nr 1 (1.01.1996): 253–54. http://dx.doi.org/10.1093/jaoac/79.1.253.

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Tatini, Sita R. "Food Microbiology-Dairy". Journal of AOAC INTERNATIONAL 81, nr 1 (1.01.1998): 191–92. http://dx.doi.org/10.1093/jaoac/81.1.191.

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Tzora, Athina. "Food Microbiology: Dairy Products’ Microbiota". Applied Sciences 13, nr 22 (7.11.2023): 12111. http://dx.doi.org/10.3390/app132212111.

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Rozprawy doktorskie na temat "Dairy microbiology"

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McAstocker, Michael. "The effects of dietary dairy products on mammalian cholesterol metabolism". Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317559.

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Sarhan, Hassan Raheem. "Rapid fluorogenic methods for the detection of Escherichia coli in dairy products and water supply". Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258363.

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Coklin, Tatjana. "Detection and molecular characterization of Giardia and Cryptosporidium in Canadian dairy cattle". Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27823.

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Giardia and Cryptosporidium are intestinal protozoan parasites that infect a wide range of host species, including humans. DNA sequencing of Giardia and Cryptosporidium isolates from human and animal sources has identified numerous species and genotypes, and has demonstrated that a number of Giardia and Cryptosporidium genotypes are shared between animals and humans. Therefore, livestock may act as a source of contamination of the food and water supply. The goal of this study was to optimize methods for the detection and molecular characterization of Giardia and Cryptosporidium. Achieving this objective involved the incorporation of immunomagnetic separation, as well as the evaluation of different methods, including microscopy, flow cytometry and polymerase chain reaction. A number of faecal samples from adult cattle and calves were collected from farms in Ontario and Prince Edward Island (PEI). Following DNA extractions from stool samples, a nested-PCR was used for Giardia to amplify a fragment of the 18S rRNA gene generating a 292-bp product. Nested-PCR protocol was also used for Cryptosporidium to amplify fragments of the heat-shock protein 70 (HSP-70) gene (ca. 325 bp). For Giardia, of 143 cattle samples analyzed by PCR, 32 (22.4 %) were positive. When IMS was incorporated into the methodology, 64 out of 143 (44.8 %) samples analyzed were positive for Giardia. For Cryptosporidum, out of 143 cattle faecal samples analyzed by the PCR method using the HSP-70 gene, 58 were positive (40.6 %), while using IMS, plus PCR, 60 samples were positive (42 %). Results from this study indicated that incorporation of IMS significantly improve the sensitivity of PCR for the detection of both Giardia (p<0.01) and Cryptosporidium (p=0.02). Among the other genes that were targeted, including the beta-giardin gene and glutamate dehydrogenase (GDH) for Giardia, and the Cryptosporidium oocyst wall protein (COWP) and 18S rRNA for Cryptosporidium, the 18S rRNA for Giardia , and HSP-70 for Cryptosporidium were found to be the "best genes". When different methods, including microscopy, flow cytometry and PCR-IMS were compared, the PCR method showed the highest sensitivity in detecting both parasites. Genotyping done by DNA sequencing showed that there was a high prevalence of zoonotic genotypes (Assemblage A for Giardia , and C. parvum bovine genotype for Cryptosporidium ) among the samples from both PEI and Ontario. In addition, a temporal study was done on calf samples from Ontario and showed that over time there was a decrease in Cryptosporidium infections, concomitant with an increase in Giardia infections.
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Davidse, Elton (Elton Kurt). "Prevention and treatment of mastitis in dairy cows with bacteriocins produced by Enterococcus faecalis". Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/16296.

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Thesis (MSc)--University of Stellenbosch, 2003.
ENGLISH ABSTRACT: The effect of the bacteriocin-like peptide AS-48, produced by Enterococcus faecalis FAIRE 92, was tested against a mastitis isolate of Staphylococcus aureus in an in vivo and in vitro study. During initial tests peptide AS-48 showed no significant activity towards S. aureus, even with a ten-fold concentrated cell-free supernatant. Activity was obtained only after purification with Triton X-114 phase partitioning, followed by cation exchange chromatography. Titers for the purified peptide varied between 3200 and 12800 AU/ml. The purified peptide also exhibited activity towards Streptococcus agalactiae and Streptococcus dysgalactiae, but not against Escherichia coli. The size of peptide AS-48 was determined at 7150 Da, based on electronspray mass spectrometry and SDS-PAGE. Complete inhibition of cell growth was obtained by adding 1ml of the purified peptide (3200 AU/ml) to 100 ml of cells of S. aureus in the lag growth phase. When the same concentration of peptide AS-48 was added to a culture of S. aureus in mid-exponential growth, a slight decrease in viable cell numbers was recorded, which lasted for only 30 min. Cell growth commenced thereafter. In situ experiments in cows were done with purified peptide AS-48, encapsulated in liposomes. These in vivo studies were conducted by administering peptide AS-48 (6400 AU/ml) to different udder quarters. In a prevention trial, i.e. where quarters were pretreated with peptide AS-48, a reduction close to 90% in the viable cell numbers of S. aureus was recorded relative to the control quarters, which were not treated with the peptide. A 50% reduction in somatic cell count (SCC) was recorded. In the treatment trial, i.e. infected quarters treated with peptide AS-48, a reduction of up to 94% in viable cell numbers of S. aureus was recorded. In the same quarters, a reduction in SCC amounted to almost 80%. A recombinant strain was constructed by conjugating plasmid 92 (p92), encoding peptide AS-48, from Enterococcus faecalis FAIRE 92 to E. faecalis FA2/Ent, which produces enterocins 1071A and 1071B. Southern blot hybridization experiments revealed thepresence of plasmid p92 in the recipient strain without the loss of plasmid pEF1071, which encodes enterocins 1071A and 1071B. All three antimicrobial peptides, i.e. enterocin 1071A, enterocin 1071B and peptide AS-48, were produced in transconjugant FA2/Ent/AS-48. The spectrum of antimicrobial activity of the transconjugant was greater than that recorded for strains FA2/Ent and FAIRE 92, respectively and included E. faecalis, Bacillus cereus, Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus curvatus, Lactobacillus fermentum, Lactobacillus plantarum, Lactobacillus reuteri, Lactobacillus sakei, Leuconostoc cremoris, Leuconostoc pentosaceus, Staphylococcus carnosus and S. aureus. These organisms are not inhibited by strain FA2/Ent. However, low levels of peptide AS-48 was produced by strain FA2/Ent/AS-48. Further research in fermentation and gene expression will be needed before the transconjugant E. faecalis FA2/Ent/AS-48 may be used in the treatment of mastitis.
AFRIKAANSE OPSOMMING: Die effek van die bakteriosien-agtige, peptied AS-48, geproduseer deur Enterococcus faecalis FAIRE 92, is gedurende ‘n in vivo en in vitro studie teen ‘n mastitiese Staphylococcus aureus-isolaat getoets. Aanvanklike toetse met peptied AS-48, selfs tienvoudig gekonsentreerde selvrye supernatant, het geen beduidende aktiwiteit teen S. aureus getoon nie. Aktiwiteit is eers verkry na suiwering met Triton X-114 fase-skeiding gevolg deur katioon uitruilingschromatografie. Titers vir die gesuiwerde peptied het tussen 3200 en 12800 AE/ml gewissel. Die gesuiwerde peptied het ook aktiwiteit teen Streptococcus agalactiae en Streptococcus dysgalctiae getoon, maar nie teen Escherichia coli nie. Peptied AS-48 het ‘n molekulêre massa van 7150 Da, soos bepaal met elektronsproeimassa spektrometrie en SDS-PAGE. Totale inhibisie van selgroei is verkry deur 1 ml gesuiwerde peptied AS-48 (3200 AE/ml) by ‘n 100 ml kultuur van S. aureus in die sloerfase te voeg. Dieselfe konsentrasie peptied AS-48, toegevoeg tydens die mideksponensiële groeifase, het egter slegs ‘n klein vermindering in die aantal lewende selle teweeg gebring en het ook vir slegs ‘n 30 min geduur. Selgroei het hierna weer normaal voort gegaan. In situ eksperimente op koeie is uitgevoer met gesuiwerde peptied AS-48, geenkapsuleerd in liposome. Hierdie In vivo studies is onderneem deur peptied AS-48 (6400 AE/ml) in verskillende kwarte van die uier, kunsmatig of reeds geïnfekteerd met S. aureus, toe te dien. In ‘n voorkomings-eksperiment waar kwarte vooraf met peptied AS- 48 behandel is, is ‘n verlaging van byna 90% in die lewende seltelling van S. aureus relatief tot die kontrole kwarte, sonder behandeling met peptied AS-48, verkry. ‘n 50% verlaging in die somatiese seltelling (SST) is verkry. In die behandelings-eksperiment, waar geïnfekteerde kwarte met peptied AS-48 behandel is, is ‘n verlaging van byna 90% in lewende S. aureus selle gevind. In dieselfde kwarte is ‘n verlaging van byna 80% in die SST genoteer.‘n Rekombinante ras is gekonstrueer deur plasmied 92 (p92), wat kodeer vir peptied AS- 48, vanaf Enterococcus faecalis FAIRE 92 na E. faecalis FA2/Ent, wat enterosien 1071A en 1071B produseer, te konjugeer. Southern-klad hibridisasie het die teenwoordigheid van plasmied p92 in die ontvanger ras, sonder die verlies van plasmied pEF1071 wat enterosien 1071A en 1071B kodeer, getoon. Al drie antimikrobiese peptiede, nl. enterosien 1071A, enterosien 1071B en peptied AS-48, is deur die transkonjugant FA2/Ent/AS-48 geproduseer. Die spektum van antimikrobiese aktiwiteit van die transkonjugant vand die transkonjugant is breër as dié van rasse FA2/Ent en FAIRE 92, onderskeidelik en het ook E. faecalis, Bacillus cereus, Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus curvatus, Lactobacillus fermentum, Lactobacillus plantarum, Lactobacillus reuteri, Lactobacillus sakei, Leuconostoc cremoris, Leuconostoc pentosaceus, Staphylococcus carnosus en S. aureus ingesluit. Hierdie organismes word nie deur ras FA2/Ent geïnhibeer nie. Lae vlakke van peptied AS-48 is egter deur ras FA2/Ent/AS-48 geproduseer. Verdere navorsing in fermentasie en geenuitdrukking is nodig voordat E. faecalis FA2/Ent/AS-48 in die behandeling van mastitis gebruik kan word.
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Sanchez, Luis R. "Removal of bacterial indicators and pathogens from dairy wastewater by a treatment system". Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284075.

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An integrated wastewater treatment facility at a dairy in Glendale, Arizona, consisting of an upper subsystem (solids separators, anaerobic lagoons, and aerobic ponds) and lower subsystem (wetland subsystems) has been proven to be successful in reducing indicator organisms and potential pathogens (bacteria, enteric viruses, and parasites). The collection sump of the new integrated system collects all dairy wastewater and pumps it to solid separators, which then flows by gravity to anaerobic lagoons and aerobic ponds. The upper subsystem achieved significant microbial reductions of >98 percent for total coliform, >91 percent for coliphage, >95 percent for enterococci, >91 percent for Listeria monocytogenes, and >99.9 percent for Cryptosporidium . Additional reductions although limited were observed in the outflow from the wetland cells.
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Manshadi, Faezeh Dehghan. "Occurence of pathogenic and indicator microorganisms on produce irrigated with dairy wastewater". Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/289980.

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This project was designed to assess the potential for contamination of produce during irrigation with wastewater from animal operations. Dairy wastewater from the University of Arizona Campus Dairy Research Center was used to irrigate three different types of vegetable crops: lettuce, carrot, and bell pepper. This study was conducted over two consecutive years. The crops were planted in February and vegetables were harvested from May through July. Irrigation water and vegetable samples were examined for Escherichia coli, Clostridium perfringens, Listeria monocytogenes, and coliphage. In the dairy wastewater, E. coli concentrations averaged 5.7 x 10⁵ MPN/100 mL in the first year (2000), and 9.9 x 10⁷ MPN/100 mL in the second year (2001). C. perfringens concentrations were nearly the same in both years (1.7 x 10⁴ and 3.4 x 10⁴ CFU per 100 mL). Coliphage averaged 2.0 PFU/mL in 2000 and 1.3 x 10⁴ PFU/mL in 2001 in wastewater. E. coli was detected with greater frequency on carrots (100 and 96%) succeeded by lettuce (67 and 96%) and bell peppers (63 and 58%). The same was true for C. perfringens : carrots (100%), lettuce (86 and 88%), and bell peppers (100 and 50%). Coliphages were not detected on any of the vegetable crops except for average concentrations of 2 PFU/g on lettuce in the first year. L. monocytogenes was not detected on any of the vegetable samples. ANOVA test results indicates that E. coli and C. perfringens concentrations on three crops were statistically different (p < 0.0001) which suggest that the degree of contamination on the surface of the vegetables depends on where the edible portion of the crop is situated (above the soil or under the soil). The greatest contamination occurred on the carrots followed by lettuce and bell peppers. E. coli and C. perfringens were recovered from the carrots, bell peppers, and soil 55 days after wastewater irrigation of the plots had ceased. Positive correlations (p < 0.05) were found between E. coli and C. perfringens density and soil moisture content. The greatest risk of infection from pathogenic E. coli (O157:H7) occurs from consumption of lettuce and carrots. The annual risk of infection from consumption of all three vegetables was above the acceptable risk of 1:10,000 per year. The results of this study suggest that a more strict irrigation water quality standard for root and leafy vegetables might be appropriate to prevent the risk of infection in exposed population.
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Mosteller, Tracy M. "Sanitizer efficacy towards attached bacteria in a simulated milk pipeline system using pure and mixed cultures". Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08062007-094410/.

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Mugabi, Robert. "Genotypes And Phenotypes Of Staphylococci On Selected Dairy Farms In Vermont". ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/844.

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The genus Staphylococcus contains at least 47 species and 23 subspecies. Bacteria in this genus are ubiquitous; many are commensals on human and animal skin and can be opportunistic pathogens. In dairy cattle, staphylococci are the leading cause of intramammary infections (IMI) and mastitis. Mastitis is the inflammation of the mammary gland, and is one of the leading infectious diseases causing production losses in the dairy industry. Based on the ability to clot blood plasma in vitro, members of the genus can be divided into two groups: coagulase positive staphylococci (CPS) and coagulase negative staphylococci (CNS). In the dairy industry, Staphylococcus aureus is the most common CPS causing mastitis and is considered a major mastitis pathogen compared to the CNS, which as a group have been described as minor mastitis pathogens. The CNS species are increasingly recognized as an important cause of bovine mastitis, although the relative role of some species is still uncertain. Our understanding of the local and global epidemiology of CNS mastitis is improving with application of more accurate DNA sequence-based species identification methods and techniques to discriminate between strains within species. These factors have led to a shift in perspective, with the CNS being recognized as a heterogeneous group where some species are more important than others in bovine mastitis. The major goals of this thesis were to describe Staphylococcus mastitis epidemiology, and to identify phenotypes that may contribute to persistence in various niches on selected dairy farms in Vermont. We conducted 2 field studies on 2 groups of farms in Vermont. In the first study, we collected S. aureus isolates from bulk tank milk of 44 certified organic dairy farms. In the second field study, we completed quarter milk, cow skin, and environmental sampling of 5 herds that make farmstead cheeses. In both studies, we used non-selective and selective agar medium to isolate staphylococci from the farm sources. From these studies, we collected 1,853 Staphylococcus spp. isolates. We used PCR-amplicon sequence-based species identification to describe Staphylococcus species diversity on these selected Vermont dairy farms. S. aureus isolates were strain-typed using an established Multilocus Sequence Typing (MLST) scheme. A novel MLST scheme was developed to investigate the molecular epidemiology of S. chromogenes, one of the leading CNS species causing bovine mastitis in this and other studies. We also evaluated antibiotic resistance and biofilm formation phenotypes and genotypes of staphylococci to test the hypothesis that these phenotypes may be associated with strain types. In the study of organic dairy farms, 20 S. aureus strain types (STs) were identified, including ten novel STs. The majority of STs belonged to lineages or clonal complexes (CCs) previously identified as cattle adapted (e.g. CC97 and CC151). Associations between ST and carriage of beta-lactam resistance and biofilm forming capacity were identified among the S. aureus isolates from these farms. In the 5-herd study, a total of 27 different staphylococci species were identified from various niches including humans, but only five species; S. chromogenes, S. aureus, S. haemolyticus, S. simulans, and S. xylosus were commonly identified to cause IMI. S. aureus and S. chromogenes strain types were niche specific.
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Yam, Godward Georgia Nga-Mun. "Studies on enhancing the viability and survival of probiotic bacteria in dairy foods through strain selection and microencapsulation". Thesis, View thesis View thesis, 2000. http://handle.uws.edu.au:8081/1959.7/411.

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In this study, strains of probiotic bacteria have been selected for tolerance to low pH, bile, sucrose, oxygen in media and low storage temperatures. Lactobacillus acidophilus 2401 and Bifidobacterium infantis 1912 were selected as strains able to survive in these conditions. These two strains were then offered further protection from the adverse conditions of food processing and storage by microencapsulation in a calcium alginate and starch gel matrix. Encapsulation in calcium alginate increases survival in yoghurt. In cheddar cheese the free L. acidophilus 2401 and B. infantis 1912 cells survived better than the encapsulated cells, probably due to the dense nature of the cheddar cheese matrix combined with the encapsulation restricting the flow of the nutrients and metabolites between the outside environment and the cells. In ice cream survival was high, probably due to the high fat and solids nature of the ice cream combined with the low storage temperature. The trial results of the laboratory scale production was consistent with the survival results for yoghurt and cheddar cheese. Incorporation of encapsulated probiotic bacteria into ice cream and cheddar cheese was acceptable by sensory standards and largely unnoticeable in comparison with the same foods without capsules. The capsules were visible and able to be felt on the tongue when eaten in yoghurt causing the product to be disliked by the panellists.
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Yam, Godward Georgia Nga-Mun, of Western Sydney Hawkesbury University, Faculty of Science and Technology i of Science Food and Horticulture School. "Studies on enhancing the viability and survival of probiotic bacteria in dairy foods through strain selection and microencapsulation". THESIS_FST_SFH_YamGodward_G.xml, 2000. http://handle.uws.edu.au:8081/1959.7/411.

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In this study, strains of probiotic bacteria have been selected for tolerance to low pH, bile, sucrose, oxygen in media and low storage temperatures. Lactobacillus acidophilus 2401 and Bifidobacterium infantis 1912 were selected as strains able to survive in these conditions. These two strains were then offered further protection from the adverse conditions of food processing and storage by microencapsulation in a calcium alginate and starch gel matrix. Encapsulation in calcium alginate increases survival in yoghurt. In cheddar cheese the free L. acidophilus 2401 and B. infantis 1912 cells survived better than the encapsulated cells, probably due to the dense nature of the cheddar cheese matrix combined with the encapsulation restricting the flow of the nutrients and metabolites between the outside environment and the cells. In ice cream survival was high, probably due to the high fat and solids nature of the ice cream combined with the low storage temperature. The trial results of the laboratory scale production was consistent with the survival results for yoghurt and cheddar cheese. Incorporation of encapsulated probiotic bacteria into ice cream and cheddar cheese was acceptable by sensory standards and largely unnoticeable in comparison with the same foods without capsules. The capsules were visible and able to be felt on the tongue when eaten in yoghurt causing the product to be disliked by the panellists.
Master of Science (Hons)
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Książki na temat "Dairy microbiology"

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K, Robinson R., red. Dairy microbiology. Wyd. 2. London: Elsevier Applied Science, 1990.

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H, Marth Elmer, i Steele James L. 1959-, red. Applied dairy microbiology. New York: Marcel Dekker, 1998.

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Robinson, Richard K., red. Dairy Microbiology Handbook. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2002. http://dx.doi.org/10.1002/0471723959.

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Robinson, Richard K., red. Dairy Microbiology Handbook. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2002. http://dx.doi.org/10.1002/0471723959.

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Robinson, Richard K. Dairy Microbiology Handbook. New York: John Wiley & Sons, Ltd., 2005.

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H, Marth Elmer, i Steele James L. 1959-, red. Applied dairy microbiology. Wyd. 2. New York: Marcel Dekker, 2001.

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K, Robinson R., red. Dairy microbiology handbook. Wyd. 3. New York: Wiley Interscience, 2002.

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Poltronieri, Palmiro, red. Microbiology in Dairy Processing. Chichester, UK: John Wiley & Sons Ltd and the Institute of Food Technologists, 2017. http://dx.doi.org/10.1002/9781119115007.

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Quin, Melanie. Applied microbiology in the dairy industry. Cambridge: Hobsons, 1989.

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Y, Tamime A., red. Probiotic dairy products. Oxford, UK: Blackwell Pub., 2005.

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Części książek na temat "Dairy microbiology"

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Johnson, Mark E., i James L. Steele. "Fermented Dairy Products". W Food Microbiology, 823–39. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555818463.ch32.

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Farkye, Nana Y., i Ebenezer R. Vedamuthu. "Microbiology of Soft Cheeses". W Dairy Microbiology Handbook, 479–513. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch10.

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Cogan, Timothy M., i Thomas P. Beresford. "Microbiology of Hard Cheese". W Dairy Microbiology Handbook, 515–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch11.

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Boor, Kathryn J., i Steven C. Murphy. "Microbiology of Market Milks". W Dairy Microbiology Handbook, 91–122. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch3.

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Tamime, Adnan Y. "Microbiology of Starter Cultures". W Dairy Microbiology Handbook, 261–366. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch7.

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Robinson, Richard K., Adnan Y. Tamime i Monika Wszolek. "Microbiology of Fermented Milks". W Dairy Microbiology Handbook, 367–430. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch8.

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Gardiner, Gillian E., R. Paul Ross, Phil M. Kelly, Catherine Stanton, J. Kevin Collins i Gerald Fitzgerald. "Microbiology of Therapeutic Milks". W Dairy Microbiology Handbook, 431–78. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch9.

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Chambers, James V. "The Microbiology of Raw Milk". W Dairy Microbiology Handbook, 39–90. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch2.

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Wilbey, R. Andrew. "Microbiology of Cream and Butter". W Dairy Microbiology Handbook, 123–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471723959.ch4.

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Nsofor, Obianuju N., i Joseph F. Frank. "Milk and Dairy Products". W Food Microbiology, 169–85. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555818463.ch7.

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Streszczenia konferencji na temat "Dairy microbiology"

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CASTRO, ELISÂNGELA DE ANDRADE, ELISABETH MARIANO BATISTA, POLIANA BRITO DE SOUSA, ANTONIO BELFORT DANTAS CAVALCANTE i MARLENE NUNES DAMACENO. "Evaluation of Microbiological Stability of Frozen Fermented Dairy Drink Prebiotic Flavored Caja-Umbu". W XII Latin American Congress on Food Microbiology and Hygiene. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/foodsci-microal-200.

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Biscola, Vanessa, Jean-Marc Chobert, Thomas Haertlé i Bernadette Dora Gombossy de Melo Franco. "Screening for Proteolytic Lactic Acid Bacteria With Potential for Application in the Production of Fermented Hypoallergenic Dairy Products". W XII Latin American Congress on Food Microbiology and Hygiene. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/foodsci-microal-029.

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Golban, Rita. "Aspecte privind implicarea speciilor microbiene în fermentațiile din produsele lactate". W Scientific and practical conference with international participation: "Management of the genetic fund of animals – problems, solutions, outlooks". Scientific Practical Institute of Biotechnologies in Animal Husbandry and Veterinary Medicine, 2023. http://dx.doi.org/10.61562/mgfa2023.53.

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n the present research were investigated some microbiological aspects of the microflora of some assortments of dairy products regarding the involvement of microbial species in fermentation processes in various periods of refrigeration according to the scheme of laboratory microbiological conduct. The registered results through the evaluations of the number of colonies in dairy products determined by the species Streptococcus lactis, in various refrigeration periods regarding the quantitative study as well as its importance in the lactic fermentation, allowed us to obtain relevant knowledge specific to the microbiology of food products. Isolation of the species from dairy products of different varieties determined a favorable saprophytic microflora in the bacteriological study of microbial cultures on culture media in different periods of refrigeration and microscopic in-dices of streptococcal cells specific to the species.
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Calil, Natalia Oliveira, Humberto Moreira Húngaro, Flavio Oliveira Ferraz, Aline Siqueira Ferreira i Silvio Silvério da Silva. "Growth of Kluyveromyces marxianus yeasts strains in deproteined whey obtained from dairy industry". W Proceedings of the II International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2007). WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789812837554_0092.

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Santosa, C. M., N. P. Rukmi, F. B. Lestari, M. Wasissa, D. A. Dewananda i S. I. O. Salasia. "Susceptibility Test of Staphylococcus aureus Isolated from Cow Milk, Goat Milk, and Dairy Farm Workers Against Various Antibiotics". W 10th International Seminar and 12th Congress of Indonesian Society for Microbiology (ISISM 2019). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/absr.k.210810.022.

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Cruz, Fernando Costa da, BRENO FIGUEIREDO MAIA, FERNANDO AUGUSTO MIRANDA COSTA, NAILLA BYATRIZ SILVA DE MORAIS i MAYKON LEAL BRANDÃO. "A INFLUÊNCIA DE ANTIBIÓTICOS NA RESISTÊNCIA E BACTÉRIAS E NO AUMENTO DOS RISCOS À SAÚDE HUMANA: UMA REVISÃO DE LITERATURA." W II Congresso Nacional de Microbiologia Clínica On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/ii-conamic/36.

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Introdução: Os antibióticos são fundamentais para o tratamento das infecções bacterianas. Entretanto, anos de irrestrita utilização e de uso inadequado desses fármacos têm criado ambientes nos quais as bactérias resistentes a antibióticos acabam se multiplicando. Tomando como base a ideia de que bactérias de microbiota são as que carregam grande quantidade de genes de resistência a uma ou mais drogas, é possível predizer que os mecanismos de resistência podem ser intrínsecos ao microrganismo estudado ou adquiridos por meio de transmissão de material genético. Objetivo: Identificar e revisar, dentro da literatura especializada, dados sobre a influência da utilização irrestrita de antibióticos na resistência de bactérias presentes no meio ambiente, além de identificar seu grau de influência na elevação dos riscos à saúde do homem. Material e Métodos: Este estudo foi realizado por intermédio de revisão bibliográfica, sendo realizada a seleção por tipos de espécies catalogadas em literatura específica. Ademais, foi utilizada plataforma SciELO para leitura e análise de diversos documentos pertinentes ao tema proposto. Resultados: De acordo com estudos catalogados, pôde-se encontrar espécies altamente resistentes a exemplo das bactérias estafilococos, as enterobactérias, a Pseudomonas aeruginosa, o Acinetobacter baumannii e, mais recentemente, os hemófilos, gonococos, enterococos e pneumococos. Foi possível analisar que bactérias oportunistas resistentes a antibióticos possuem potencial para gerar infecções graves, e que a eventual exposição desses micro-organismos à medicamentos podem surtir efeito adverso na manutenção da saúde humana, haja vista que o aumento da resistência a medicamentos antimicrobianos amplia o potencial dessas bactérias em causar estragos maiores para a saúde humana. Conclusão: Foi possível constatar, nesse aspecto, a necessidade de emprego de metodologia ATC/DDD (Anatomical Therapeutic Chemical/ Defined Daily Dose) como ferramenta de ampliação do leque de possibilidades de estudos.
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Maziero, João Pedro, Carolina Toledo Santos, Pricila Veiga dos Santos i Juliano Gonçalves Pereira. "Avaliação do uso de ozônio em temperaturas de leite cru refrigerado na contagem de psicrotróficos". W Semana Online Científica de Veterinária. CONGRESSE.ME, 2021. http://dx.doi.org/10.54265/gsri7118.

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A qualidade do leite cru está associada às boas práticas de ordenha proveniente de rebanhos sadios e com refrigeração obrigatória do leite cru na granja leiteira entre 4 e 7° C, podendo chegar até, no máximo, 9° C durante a coleta final (BRASIL 2018). Embora a refrigeração seja eficaz para aumentar a vida útil do leite cru, a manutenção das baixas temperaturas favorece a multiplicação de bactérias psicrotróficas, que produzem proteases e lipases termorresistentes, que permanecendo ativas mesmo após a pasteurização, podem afetar negativamente, tanto o próprio leite, quanto seus derivados (RIBEIRO et al., 2018). Visando reduzir a contagem de microrganismos psicrotróficos no leite cru, o presente trabalho avaliou a eficácia da aplicação de ozônio, considerado um bactericida verde por não ser poluente e não deixar resíduos no alimento, diretamente no tanque de resfriamento. As amostras de leite cru foram obtidas de um rebanho saudável e recolhidas diretamente do tanque de resfriamento da propriedade e armazenadas em frascos estéreis com volume de 6 litros sob refrigeração (4 e 9° C). A aplicação do ozônio seguiu delineamento fatorial com variáveis independentes sendo as temperaturas do leite (4 e 9° C) e os tempos de exposição ao ozônio (5 e 15 minutos) utilizando Gerador de Ozônio N202F Bivolt 500mg/h O³ Disinfector - Diluka Power. Foram retiradas amostras antes e após a ozonização. As amostras foram então armazenadas por 48 horas sob refrigeração (4° C) para permitir a proliferação da flora psicrotrófica. O teor de psicrotróficos e a contagem bacteriana total das amostras e do grupo controle foram avaliados em meio ágar bacteriológico PCA por 10 dias a 7° C e a 36° C por 24 horas, respectivamente. A aplicação de ozônio foi eficaz em reduzir a contagem de microrganismos psicrotróficos no tempo de 5 minutos a 4° C, esse resultado é extremamente satisfatório, visto que, a temperatura de aplicação é a mesma aplicada aos tanques de refrigeração nas propriedades, o que permitiria, facilmente, a aplicação nas próprias fazendas. Agradecimentos Agradecemos à equipe do Serviço de Orientação à Alimentação Pública da FMVZ-Unesp e ao proprietário da fazenda por disponilibizar o material utilizado na pesquisa. Referências BRASIL. Ministério da Agricultura, Pecuária e Abastecimento. Instrução normativa nº 76, de 26 de novembro de 2018. Regulamentos Técnicos que fixam a identidade e as características de qualidade que devem apresentar o leite cru refrigerado, o leite pasteurizado e o leite pasteurizado tipo A. Diário Oficial da União, Brasília, 2018. RIBEIRO JÚNIOR, J. C.et al. The main spoilage1 related psychrotrophic bacteria in refrigerated raw milk. Journal of dairy science, v. 101, n. 1, p. 75-83, 2018. PALAVRAS-CHAVE: Microbiologia dos alimentos, Qualidade do leite, Tecnologia verde
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Raporty organizacyjne na temat "Dairy microbiology"

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Mizrahi, Itzhak, i Bryan A. White. Uncovering rumen microbiome components shaping feed efficiency in dairy cows. United States Department of Agriculture, styczeń 2015. http://dx.doi.org/10.32747/2015.7600020.bard.

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Ruminants provide human society with high quality food from non-human-edible resources, but their emissions negatively impact the environment via greenhouse gas production. The rumen and its resident microorganisms dictate both processes. The overall goal of this project was to determine whether a causal relationship exists between the rumen microbiome and the host animal's physiology, and if so, to isolate and examine the specific determinants that enable this causality. To this end, we divided the project into three specific parts: (1) determining the feed efficiency of 200 milking cows, (2) determining whether the feed- efficiency phenotype can be transferred by transplantation and (3) isolating and examining microbial consortia that can affect the feed-efficiency phenotype by their transplantation into germ-free ruminants. We finally included 1000 dairy cow metadata in our study that revealed a global core microbiome present in the rumen whose composition and abundance predicted many of the cows’ production phenotypes, including methane emission. Certain members of the core microbiome are heritable and have strong associations to cardinal rumen metabolites and fermentation products that govern the efficiency of milk production. These heritable core microbes therefore present primary targets for rumen manipulation towards sustainable and environmentally friendly agriculture. We then went beyond examining the metagenomic content, and asked whether microbes behave differently with relation to the host efficiency state. We sampled twelve animals with two extreme efficiency phenotypes, high efficiency and low efficiency where the first represents animals that maximize energy utilization from their feed whilst the later represents animals with very low utilization of the energy from their feed. Our analysis revealed differences in two host efficiency states in terms of the microbial expression profiles both with regards to protein identities and quantities. Another aim of the proposal was the cultivation of undescribed rumen microorganisms is one of the most important tasks in rumen microbiology. Our findings from phylogenetic analysis of cultured OTUs on the lower branches of the phylogenetic tree suggest that multifactorial traits govern cultivability. Interestingly, most of the cultured OTUs belonged to the rare rumen biosphere. These cultured OTUs could not be detected in the rumen microbiome, even when we surveyed it across 38 rumen microbiome samples. These findings add another unique dimension to the complexity of the rumen microbiome and suggest that a large number of different organisms can be cultured in a single cultivation effort. In the context of the grant, the establishment of ruminant germ-free facility was possible and preliminary experiments were successful, which open up the way for direct applications of the new concepts discovered here, prior to the larger scale implementation at the agricultural level.
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Klement, Eyal, Elizabeth Howerth, William C. Wilson, David Stallknecht, Danny Mead, Hagai Yadin, Itamar Lensky i Nadav Galon. Exploration of the Epidemiology of a Newly Emerging Cattle-Epizootic Hemorrhagic Disease Virus in Israel. United States Department of Agriculture, styczeń 2012. http://dx.doi.org/10.32747/2012.7697118.bard.

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In September 2006 an outbreak of 'Bluetongue like' disease struck the cattle herds in Israel. Over 100 dairy and beef cattle herds were affected. Epizootic hemorrhagic disease virus (EHDV) (an Orbivirusclosely related to bluetongue virus (BTV)), was isolated from samples collected from several herds during the outbreaks. Following are the aims of the study and summary of the results: which up until now were published in 6 articles in peer-reviewed journals. Three more articles are still under preparation: 1. To identify the origin of the virus: The virus identified was fully sequenced and compared with the sequences available in the GenBank. It appeared that while gene segment L2 was clustered with EHDV-7 isolated in Australia, most of the other segments were clustered with EHDV-6 isolates from South-Africa and Bahrain. This may suggest that the strain which affected Israel on 2006 may have been related to similar outbreaks which occurred in north-Africa at the same year and could also be a result of reassortment with an Australian strain (Wilson et al. article in preparation). Analysis of the serological results from Israel demonstrated that cows and calves were similarly positive as opposed to BTV for which seropositivity in cows was significantly higher than in calves. This finding also supports the hypothesis that the 2006 EHD outbreak in Israel was an incursive event and the virus was not present in Israel before this outbreak (Kedmi et al. Veterinary Journal, 2011) 2. To identify the vectors of this virus: In the US, Culicoides sonorensis was found as an efficient vector of EHDV as the virus was transmitted by midges fed on infected white tailed deer (WTD; Odocoileusvirginianus) to susceptible WTD (Ruder et al. Parasites and Vectors, 2012). We also examined the effect of temperature on replication of EHDV-7 in C. sonorensis and demonstrated that the time to detection of potentially competent midges decreased with increasing temperature (Ruder et al. in preparation). Although multiple attempts were made, we failed to evaluate wild-caught Culicoidesinsignisas a potential vector for EHDV-7; however, our finding that C. sonorensis is a competent vector is far more significant because this species is widespread in the U.S. As for Israeli Culicoides spp. the main species caught near farms affected during the outbreaks were C. imicolaand C. oxystoma. The vector competence studies performed in Israel were in a smaller scale than in the US due to lack of a laboratory colony of these species and due to lack of facilities to infect animals with vector borne diseases. However, we found both species to be susceptible for infection by EHDV. For C. oxystoma, 1/3 of the Culicoidesinfected were positive 11 days post feeding. 3. To identify the host and environmental factors influencing the level of exposure to EHDV, its spread and its associated morbidity: Analysis of the cattle morbidity in Israel showed that the disease resulted in an average loss of over 200 kg milk per cow in herds affected during September 2006 and 1.42% excess mortality in heavily infected herds (Kedmi et al. Journal of Dairy Science, 2010). Outbreak investigation showed that winds played a significant role in virus spread during the 2006 outbreak (Kedmi et al. Preventive Veterinary Medicine, 2010). Further studies showed that both sheep (Kedmi et al. Veterinary Microbiology, 2011) and wild ruminants did not play a significant role in virus spread in Israel (Kedmi et al. article in preparation). Clinical studies in WTD showed that this species is highly susceptibile to EHDV-7 infection and disease (Ruder et al. Journal of Wildlife Diseases, 2012). Experimental infection of Holstein cattle (cows and calves) yielded subclinical viremia (Ruder et al. in preparation). The findings of this study, which resulted in 6 articles, published in peer reviewed journals and 4 more articles which are in preparation, contributed to the dairy industry in Israel by defining the main factors associated with disease spread and assessment of disease impact. In the US, we demonstrated that sufficient conditions exist for potential virus establishment if EHDV-7 were introduced. The significant knowledge gained through this study will enable better decision making regarding prevention and control measures for EHDV and similar viruses, such as BTV.
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