Relevant bibliographies by topics / Campylobacter

Academic literature on the topic 'Campylobacter'

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Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Campylobacter"

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Huang, Hongsheng, Brian W. Brooks, Ruff Lowman, and Catherine D. Carrillo. "Campylobacter species in animal, food, and environmental sources, and relevant testing programs in Canada." Canadian Journal of Microbiology 61, no. 10 (October 2015): 701–21. http://dx.doi.org/10.1139/cjm-2014-0770.

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Campylobacter species, particularly thermophilic campylobacters, have emerged as a leading cause of human foodborne gastroenteritis worldwide, with Campylobacter jejuni, Campylobacter coli, and Campylobacter lari responsible for the majority of human infections. Although most cases of campylobacteriosis are self-limiting, campylobacteriosis represents a significant public health burden. Human illness caused by infection with campylobacters has been reported across Canada since the early 1970s. Many studies have shown that dietary sources, including food, particularly raw poultry and other meat products, raw milk, and contaminated water, have contributed to outbreaks of campylobacteriosis in Canada. Campylobacter spp. have also been detected in a wide range of animal and environmental sources, including water, in Canada. The purpose of this article is to review (i) the prevalence of Campylobacter spp. in animals, food, and the environment, and (ii) the relevant testing programs in Canada with a focus on the potential links between campylobacters and human health in Canada.
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SMITH, JAMES L., and PINA M. FRATAMICO. "Fluoroquinolone Resistance in Campylobacter." Journal of Food Protection 73, no. 6 (June 1, 2010): 1141–52. http://dx.doi.org/10.4315/0362-028x-73.6.1141.

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Campylobacter is a commensal in poultry, and therefore, poultry and poultry products are major sources of Campylobacter infections in humans. Fluoroquinolones inhibit the growth of Campylobacter and other microorganisms by binding to bacterial DNA gyrase and DNA topoisomerase IV. These enzymes are associated with bacterial transcription, replication, and chromosome condensation and segregation. Selection pressure in the presence of fluoroquinolones rapidly leads to resistance in Campylobacter, due to the selection for mutations in DNA gyrase. Fluoroquinolone-resistant campylobacters have been found in poultry feces and carcasses, and in retail poultry meat products in most areas of the world. In addition, other food animals and the meat products from those animals have been shown contaminated with fluoroquinolone-resistant campylobacters. Even the removal of fluoroquinolones from use in treating animal diseases has not entirely eliminated the presence of resistant Campylobacter jejuni and Campylobacter coli from animals and animal products. Human exposure to Campylobacter infection could be reduced by using strategies that decrease colonization of chickens by the pathogen.
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LINE, J. ERIC. "Development of a Selective Differential Agar for Isolation and Enumeration of Campylobacter spp." Journal of Food Protection 64, no. 11 (November 1, 2001): 1711–15. http://dx.doi.org/10.4315/0362-028x-64.11.1711.

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Direct plating is an effective technique for isolation and enumeration of Campylobacters from a variety of sample types; however, distinguishing Campylobacters from non-Campylobacter contaminants that frequently grow on many existing agars is difficult. In this study, it was determined that exposing Campylobacters to low levels (200 mg/liter) of triphenyltetrazolium chloride (TTC) was not inhibitory to growth yet was sufficient to give a deep-red to magenta color to the colonies. The new agars (Campy-Line agar [CLA] and Campy-Line blood agar [CLBA]) are translucent. The contrast of deep-red colonies on a translucent background greatly facilitates Campylobacter isolation and makes enumeration on light boxes or by electronic means possible. Direct plating of broiler carcass rinse samples (n = 20) was compared on Campy-Cefex agar and CLA. Recovery of Campylobacter populations was not significantly different between the agars (P < 0.05); however, enumeration was much less labor intensive with the CLA. No contaminants were observed on the CLA, whereas the Cefex agar supported the growth of approximately 14 contaminating (non-Campylobacter) CFU/ml. In a separate trial, recovery of Campylobacters from carcass rinses (n = 25) was similarly compared on Cefex, CLA, and CLBA. Again, recovery of Campylobacters was not significantly different between the agars (Pearson correlation coefficient = 0.988), whereas about nine contaminating (non-Campylobacter) CFU/ml were observed on Cefex agar and none on CLA or CLBA. Although some contaminants can still grow on CLA and CLBA and can present red colonies, most of these contaminants are easily distinguished from Campylobacter by differences in colony morphology.
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El-Shibiny, A., P. L. Connerton, and I. F. Connerton. "Enumeration and Diversity of Campylobacters and Bacteriophages Isolated during the Rearing Cycles of Free-Range and Organic Chickens." Applied and Environmental Microbiology 71, no. 3 (March 2005): 1259–66. http://dx.doi.org/10.1128/aem.71.3.1259-1266.2005.

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ABSTRACT Campylobacters and Campylobacter-specific bacteriophages were isolated and enumerated during the rearing cycle of free-range (56 days) and organic chickens (73 days) at 3-day intervals from hatching until slaughter. In both flocks Campylobacter jejuni was the initial colonizer but Campylobacter coli was detected more frequently from 5 weeks of age. The diversity of the Campylobacter isolates was examined by pulsed-field gel electrophoresis of SmaI-digested genomic DNA and antimicrobial resistance typing. Bacteriophages were isolated from 51% (19 of 37 birds) of Campylobacter-positive organic birds (log10 2.5 to log10 5.7 PFU/g of cecal contents). The bacteriophages were all typical group III Campylobacter bacteriophages in terms of genomic size but could be characterized in terms of their host range and placed into five different groups. In contrast to the organic birds, anti-Campylobacter activity (bacteriocin-like) was observed in 26% (10 of 38 birds) of Campylobacter-positive free-range birds, and only one bacteriophage was isolated. Appearance of either bacteriophages or anti-Campylobacter activity was associated with changes in the levels of colonization and the predominant genotypes and species isolated. The frequency and potential influence of naturally occurring bacteriophages and/or inhibitory substances on the diversity and fluctuations of populations of campylobacters have not previously been reported in either free-range or organic chickens.
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MOORE, JOHN E., TOM S. WILSON, DAVID R. A. WAREING, TOM J. HUMPHREY, and PHILIP G. MURPHY. "Prevalence of Thermophilic Campylobacter spp. in Ready-to-Eat Foods and Raw Poultry in Northern Ireland." Journal of Food Protection 65, no. 8 (August 1, 2002): 1326–28. http://dx.doi.org/10.4315/0362-028x-65.8.1326.

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Although there have been numerous studies investigating the prevalence of campylobacters in animals and raw meats, there are limited data on the persistence of these organisms in ready-to-eat (RTE) foodstuffs. Although poultry is now well established as a major reservoir of thermophilic campylobacters, it is widely assumed that hazard analysis critical control point (HACCP) controls in commercial and industrial settings are effective in eliminating this hazard through thorough cooking of RTE products. Therefore, it was the primary aim of this study to investigate the effectiveness of HACCP controls in eliminating campylobacters in such cooked RTE foods by attempting to isolate viable organisms from product. Concurrently, the results of this study demonstrate that local poultry is highly contaminated with campylobacters. Commercially available RTE foodstuffs (n = 2,030) consisting of 1,061 poultry-related cooked products and 969 other products were analyzed and were not found to contain thermophilic Campylobacter spp. In addition, 107 raw chickens (63 fresh birds and 44 frozen birds) were sampled, and 94% of the fresh birds and 77% of the frozen birds examined were demonstrated to be contaminated with campylobacters, with Campylobacter jejuni, Campylobacter coli, and Campylobacter lari accounting for 69, 30, and 1% of the contaminating organisms, respectively. In general, commercially available RTE foodstuffs, including cooked poultry, are not commonly contaminated with campylobacters and thus do not appear to represent a significant cause of clinical infection of Campylobacter spp. in Northern Ireland. However, raw poultry produce, including fresh and frozen chicken, frequently tested positive for campylobacters. Implementation of HACCP systems by food processors will help to minimize and/or eliminate the risk posed by this organism to the consumer.
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Inglis, G. D., L. D. Kalischuk, and H. W. Busz. "A survey ofCampylobacterspecies shed in faeces of beef cattle using polymerase chain reaction." Canadian Journal of Microbiology 49, no. 11 (November 1, 2003): 655–61. http://dx.doi.org/10.1139/w03-087.

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A polymerase chain reaction (PCR)-based survey of campylobacters associated with faeces collected from 382 beef cattle was undertaken. To ensure the removal of PCR inhibitors present in faeces and determine if adequate extraction was achieved, faeces were seeded with internal control DNA (i.e., DNA designed to amplify with the Campylobacter genus primer set, but provide a smaller amplicon) before the extraction procedure. In only two samples (0.5%) were the internal control or Campylobacter genus amplicons not detected. In the remaining 380 faecal samples, Campylobacter DNA was detected in 83% of the faecal samples (80% of the faecal samples were positive for Campylobacter genus DNA, and 3% of the samples were negative for Campylobacter genus DNA but positive for DNA of individual species). The most frequently detected species was Campylobacter lanienae (49%), a species only recently connected to livestock hosts. Campylobacter jejuni DNA was detected in 38% of the faecal samples, and Campylobacter hyointestinalis and Campylobacter coli DNA were detected in 8% and 0.5% of the samples, respectively. Campylobacter fetus DNA was not detected. Twenty-four percent of the faecal samples contained DNA of at least two species of Campylobacter. Of these samples, the majority (81%) contained DNA of C. jejuni and C. lanienae. The results of this study indicate that beef cattle commonly release a variety of Campylobacter species into the environment and may contribute to the high prevalence of campylobacteriosis in humans inhabiting areas of intensive cattle production, such as southern Alberta. Furthermore, this study demonstrates the utility of using PCR as a rapid and accurate method for simultaneously detecting the DNA of a diverse number of Campylobacter species associated with bovine faeces.Key words: campylobacters, detection, technique, Bos taurus.
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Abd El-Aziz, Norhan K., Ahmed M. Ammar, Mona M. Hamdy, Adil A. Gobouri, Ehab Azab, and Alaa H. Sewid. "First Report of aacC5-aadA7Δ4 Gene Cassette Array and Phage Tail Tape Measure Protein on Class 1 Integrons of Campylobacter Species Isolated from Animal and Human Sources in Egypt." Animals 10, no. 11 (November 8, 2020): 2067. http://dx.doi.org/10.3390/ani10112067.

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Campylobacter species are common commensals in the gastrointestinal tract of livestock animals; thus, animal-to-human transmission occurs frequently. We investigated for the first time, class 1 integrons and associated gene cassettes among pan drug-resistant (PDR), extensively drug-resistant (XDR), and multidrug-resistant (MDR) Campylobacter species isolated from livestock animals and humans in Egypt. Campylobacter species were detected in 58.11% of the analyzed chicken samples represented as 67.53% Campylobacter jejuni(C. jejuni) and 32.47% Campylobacter coli (C. coli). C. jejuni isolates were reported in 51.42%, 74.28%, and 66.67% of examined minced meat, raw milk, and human stool samples, respectively. Variable antimicrobial resistance phenotypes; PDR (2.55%), XDR (68.94%), and MDR (28.5%) campylobacters were reported. Molecular analysis revealed that 97.36% of examined campylobacters were integrase gene-positive; all harbored the class 1 integrons, except one possessed an empty integron structure. DNA sequence analysis revealed the predominance of aadA (81.08%) and dfrA (67.56%) alleles accounting for resistance to aminoglycosides and trimethoprim, respectively. This is the first report of aacC5-aadA7Δ4 gene cassette array and a putative phage tail tape measure protein on class 1 integrons of Campylobacter isolates. Evidence from this study showed the possibility of Campylobacter–bacteriophage interactions and treatment failure in animals and humans due to horizontal gene transfer mediated by class 1 integrons.
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Strakova, Nicol, Kristyna Korena, Tereza Gelbicova, Pavel Kulich, and Renata Karpiskova. "A Rapid Culture Method for the Detection of Campylobacter from Water Environments." International Journal of Environmental Research and Public Health 18, no. 11 (June 5, 2021): 6098. http://dx.doi.org/10.3390/ijerph18116098.

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The natural environment and water are among the sources of Campylobacter jejuni and Campylobacter coli. A limited number of protocols exist for the isolation of campylobacters in poorly filterable water. Therefore, the goal of our work was to find a more efficient method of Campylobacter isolation and detection from wastewater and surface water than the ISO standard. In the novel rapid culture method presented here, samples are centrifuged at high speed, and the resuspended pellet is inoculated on a filter, which is placed on Campylobacter selective mCCDA agar. The motile bacteria pass through the filter pores, and mCCDA agar suppresses the growth of background microbiota on behalf of campylobacters. This culture-based method is more efficient for the detection and isolation of Campylobacter jejuni and Campylobacter coli from poorly filterable water than the ISO 17995 standard. It also is less time-consuming, taking only 72 h and comprising three steps, while the ISO standard method requires five or six steps and 144–192 h. This novel culture method, based on high-speed centrifugation, bacterial motility, and selective cultivation conditions, can be used for the detection and isolation of various bacteria from water samples.
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WILSON, I. G. "Antibiotic resistance of Campylobacter in raw retail chickens and imported chicken portions." Epidemiology and Infection 131, no. 3 (December 2003): 1181–86. http://dx.doi.org/10.1017/s0950268803001298.

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Campylobacter isolates from raw retail chickens (n=434) sampled between 1998 and 2000 were tested for resistance to 12 antibiotics. Among 208 campylobacters tested, more than 90% of isolates were susceptible to 4 out of 9 antibiotics (nalidixic acid, erythromycin, chloramphenicol and gentamicin). Most campylobacters were resistant to 3 antibiotics and multiple resistance was found in 4%. Ciprofloxacin resistance was 11%. Campylobacter contamination (28%) in imported chickens (n=150) was almost half that found in local whole chickens (50%), but the resistance of imported isolates (n=42) was similar to that of local campylobacters. Resistance in isolates from imported chicken breasts was generally more common, but to only 4 antibiotics. Resistance patterns of chicken isolates were compared to human clinical isolates (n=494), and a greater similarity was found between the clinical and local isolates than with imported campylobacters. Lower chloramphenicol resistance was found in clinical Campylobacter isolates than in those from chicken sources.
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VALDIVIESO-GARCIA, ALFONSO, KATHLEEN HARRIS, EDWARD RICHE, STEPHANIE CAMPBELL, ANNE JARVIE, MARIA POPA, ANNE DECKERT, RICHARD REID-SMITH, and KRIS RAHN. "Novel Campylobacter Isolation Method Using Hydrophobic Grid Membrane Filter and Semisolid Medium†." Journal of Food Protection 70, no. 2 (February 1, 2007): 355–62. http://dx.doi.org/10.4315/0362-028x-70.2.355.

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Culture procedures for isolation of thermophilic campylobacters from food matrices are complex, labor intensive, and time-consuming. Most available methods include the use of antibiotics as selective agents to prevent the growth of competing microflora. A simple procedure for isolation of thermophilic campylobacters after enrichment in Rosef's enrichment broth was developed using a hydrophobic grid membrane filter (HGMF) on semisolid medium (SSM). SSM contains no antibiotics, and the HGMF physically separates Campylobacter from the enrichment broth, allowing isolation based on differential motility. The HGMF-SSM method was compared to the Agriculture and Agri-Food Canada Food Safety Procedures Manual (FSPM-10) method (Isolation of Thermophilic Campylobacters from Fresh Pork, Beef, Veal, Poultry and Ready-to-Eat Meat Products), which includes the use of selective antibiotics. During the initial study, after enrichment the HGMF-SSM method yielded pure cultures of campylobacters after 16 to 18 h (overnight) compared with 48 h for the FSPM-10 method. Ninety-four turkey samples collected at local retail stores and 38 frozen pig fecal samples were processed by both methods. Thirty-five samples (26.5%) were positive by the HGMF-SSM method; 24 (18.2%) of these positive samples contained Campylobacter jejuni and 11 (8.3%) contained Campylobacter coli. With the FSPM-10 method, 25 samples (18.9%) were positive: 21 (15.9%) with C. jejuni and 4 (3%) with C. coli. For a subsequent field study, only the HGMF-SSM method was used to isolate Campylobacter from 1,200 chicken samples and 454 turkey samples sold at retail. Analysis of five subisolates from various samples indicated that only one type of Campylobacter was recovered by the HGMF-SSM method, as ascertained by MICs for 10 antimicrobials, sequencing of the short variable region of the flaA gene, and fingerprinting based on amplified fragment length polymorphism. The absence of antibiotics in the SSM may explain the higher recovery of thermophilic campylobacters. The HGMF-SSM method resulted in improved isolation of campylobacters and is simpler, faster, cheaper, and less labor intensive than the FSPM-10 method. The recovery of one type of Campylobacter from the chicken samples may have important implications, particularly in epidemiological studies.
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Dissertations / Theses on the topic "Campylobacter"

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Okwumabua, Ogi Emeke. "Biochemical and molecular characterization of urease-positive campylobacters (campylobacter pylori and campylobacter mustelae." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/25297.

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Pratt, Alisa Annabelle. "Antibiotic Resistance Determinants of Australian Campylobacter Jejuni & Campylobacter Coli Isolates." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/366198.

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Abstract: Campylobacter species are the most common cause of foodborne disease in Australia and many countries throughout the World. Although campylobacteriosis is usually self-limiting, severe cases and those in the young, elderly and immunocompromised require antibiotic therapy. Antibiotic resistant Campylobacter isolates however may prolong illness and increase the risk of invasive disease. Antibiotic resistance in Campylobacter is thought to have arisen through the selective pressure of exposure to antimicrobial agents in veterinary medicine or animal husbandry, leading to the acquisition and dissemination of antibiotic resistance determinants, and genetic elements that harbour such genes, amongst isolates. Little was known about tetracycline and trimethoprim resistance in Australian campylobacters, including the presence of resistance genes and associated genetic elements. Aims of this study were therefore to identify in Australian Campylobacter jejuni and Campylobacter coli isolates i). Tetracycline resistant determinants and associated genetic elements, ii). Trimethoprim resistant determinants and associated genetic elements, and iii). Integron like structures and associated genetic elements. High-level tetracycline resistance was observed in 46 C. jejuni and C. coli isolates, with MICs ranging from 32 to >256mg/ml. All isolates examined harboured the tetO gene, confirming that tetracycline resistance in Australian campylobacters is also due to the previously reported TetO determinant. While several studies have described a significant role for plasmids in tetracycline resistance, this study demonstrated that in the majority of isolates (78%), including two thirds of strains that harboured plasmids, resistance was due to chromosomally encoded tetO. Six C. jejuni isolates were able to transfer a tetO harbouring plasmid to another C. jejuni strain. Plasmids were detected in approximately 74% of resistant strains, and ranged in size from small to larger plasmids (21 - 50kb). ClaI profiling of plasmids revealed genetic diversity and indicated that the tetO gene may be carried by a variety of plasmids. High level trimethoprim resistance (MICs of 1000mg/ml and >1000mg/ml) was observed in all isolates (>100) examined from a second collection of C. jejuni, C. coli and non-C. jejuni/coli spp. Just over half of isolates harboured plasmids indicating that plasmids may not be involved in trimethoprim resistance in campylobacters. Isolates were also examined for the presence of the previously identified Campylobacter associated trimethoprim resistance genes dfr1 and dfr9. Although these genes play a significant role in this resistance, only approximately 16% of strains examined putatively harboured dfr1, and dfr9 was not detected. Integrons, antibiotic resistance gene acquisition and expression systems, play an important role in trimethoprim resistance due to carriage of dfr genes as inserted gene cassettes. Trimethoprim resistant Campylobacter isolates were examined for the presence of the intI1 and intI2 genes, encoding the class 1 and class 2 integrons. Only 5.56% of strains examined for intI1 putatively carried this gene, and only 1.67% of isolates examined for intI2 putatively carried intI2. Both putative intI1 positive and negative isolates produced a variety of amplicons, ranging in size from »210bp to >1.5kb, when analysed for gene cassette sequences inserted into class 1 integrons. This study has contributed to the knowledge of tetracycline and trimethoprim resistance, including the presence of resistance genes and associated genetic elements, in Australian isolates of C. jejuni and C. coli.
Thesis (Masters)
Master of Philosophy (MPhil)
Griffith University. School of Medical Science.
Griffith Health
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Nguyen, Hai. "Acanthamoeba-Campylobacter Interactions." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20172.

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Campylobacter jejuni is an avian commensal bacterium and causes gastrointestinal diarrhea in humans called campylobacteriosis. Campylobacteriosis is acquired by consumption of undercooked poultry contamined with C. jejuni. Poultry can become colonized from contaminated drinking water. The chicken flock and drinking water of 4 poultry farms in Ontario were sampled and the prevalence of C. jejuni in these flocks was determined to be 16.7% over a 1 year sampling period. We determined that contamined- water was a significant risk factor for Campylobacter-positive flocks from flaA typing, PFGE analysis, and genomotyping several isolated strains. Free living amoebae, such as Acanthamoeba species, live in the drinking water of poultry farms. It is hypothesized that Acanthamoeba in the drinking water of poultry farms can take up and act as environmental reservoirs of C. jejuni. Acanthamoeba species were isolated from the drinking water. Acanthamoeba strains were found to act as a vehicle for protection, persistence and growth of C. jejuni isolated from the farm water. The transcriptome of both C. jejuni and A. castellanii during the initial stages of C. jejuni internalization were described by RNA-seq. C. jejuni oxidative defence genes (such as katA, sodB, fdxA) and some other unknown genes (Cj0170, Cj1325, Cj1725) were found to be essential in the interaction with A. castellanii. Our findings suggest that Acanthamoebae act as a C. jejuni reservoir and could be a contributing source of C. jejuni in the environment. Through transcriptomics studies, we have begun to uncover some genetic clues involved in this interaction.
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Ghaffer, Nacheervan M. "Filamentation of Campylobacter." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/35597/.

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The bacterial pathogen Campylobacter jejuni is a leading cause of foodborne gastroenteritis worldwide. Consumption of contaminated poultry meat is considered a major source of infection. Changes in cell morphology were demonstrated to occur spontaneously on entry in to stationary phase, with development of filamentous cells amongst short spiral morphotypes. The aim of this study was to investigate differences between the morphotypes of C. jejuni and C. coli and gain insights into their development. Using a minimal culture medium filament formation was observed to be wide spread amongst C. jejuni strains tested but was not universal in C. coli strains. Filamentation did not appear to arise due to the release of diffusible molecules or the accumulation of either toxic metabolites or oxidative stressors in the medium. Separated filaments exhibited greater intracellular ATP contents compared to spiral cells, and were able to survive longer in water at 4 and 37 C. C. jejuni 12661 was identified as producing long filaments but genome sequence analysis provided no clear explanation for the enhanced filament formation. Using RNA-Seq, transcriptome differences were examined between cells growing in exponential phase and separated cell morphotypes recovered from stationary phase cultures of the C. jejuni strains 12661 and PT14. These studies identified profound transcriptional differences between the cell morphotypes present at stationary phase, and highlighted problems of interpreting such data without separation of these sub-populations. Stationary phase cells of either morphotype were impaired in motility, which likely resulted from down-regulation of rpoN encoding sigma factor 54, and several key motility associated genes. The spoT gene of C. jejuni mediates the synthesis of ppp(G)pp as part of the stringent response to stress. The spoT gene was differentially regulated in the stationary phase morphotypes recovered in this study, as were the genes encoding the phosphohydrolases PPX1/PPX2 and polyphosphate kinases PPK1/PPK2 that control cellular (p) pp(G)pp pools. Prominent heat-shock and oxidative stress responses were evident in stationary phase cells compared to cells in exponential growth phase but transcription of the ribosomal proteins was not down-shifted. The transcript levels of several cell division associated genes were down-regulated in stationary phase spiral and filamentous cells. The formation of long filamentous cell morphotypes by C. jejuni 12661 corresponds with reduced expression of maf (inhibitor of septum formation), mreB (actin-like rod-shape determining protein), mreC (rod-shape determining protein), parA, parB (chromosome partitioning proteins), ftsA (actin-like function in cytokinesis), ftsH (ATP-dependent zinc metallopeptidase), ftsW (lipid II-linked peptidoglycan transporter) and ftsZ (tubulin-like z-ring formation) that collectively function in septum formation between daughter cells.
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Gormley, Fraser James. "The epidemiology of Campylobacter jejuni and Campylobacter coli in north east Scotland." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25813.

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Shaheen, Bashar Wajeeh. "In vitro survival of Campylobacter jejuni and Campylobacter coli at low Ph." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/SHAHEEN_BASHAR_0.pdf.

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McTavish, Sharla. "Comparative analysis of New Zealand campylobacter isolates using MLST, PFGE and flaA PCR RFLP genotyping : a thesis submitted to the Victoria University of Wellington in partial fulfilment of the requirements for the degree of Master of Science in Molecular Microbiology /." ResearchArchive@Victoria e-Thesis, 2008. http://hdl.handle.net/10063/413.

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Murphy, Helen. "Host Responses to Campylobacter." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520636.

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John, Amy. "Campylobacter in farm animals." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/13732/.

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Campylobaeter jejuni and C. coli are common causes of acute gastroenteritis in humans that are also associated with Guillain Barre and Miller Fisher syndrome. Poultry and other farm animals are the major sources of these pathogens. In this thesis it was demonstrated that hydrogen has the potential to act as an antioxidant to reduce oxidative stress caused during the growth of C. jejuni HPC5 when grown in a gas replacement jar. Growth in the absence of hydrogen in a modular atmosphere controlled system (MACS) was characterised by an intiallag that could be overcome by adding an antioxidant reagent FBP (10% ferrous sulphate, sodium pyruvate and sodium metabisulphite). Transcriptomic studies revealed that growth in the absence of hydrogen resulted in significant increases in the expression of superoxide dismutase, thiol peroxidase and ribosomal proteins. Transcriptomic studies were performed on the variants of C. jejuni HPC5 where bacteriophage predation had provoked intragenornic recombination to create second generation resistant types that are inefficient colonisers of chickens but revert to efficient colonisers and bacteriophage sensitivity when reintroduced into chickens to create third generation variants. The second generation variants were temperature sensitive, exhibited increased expression ofprophage Mu genes and low expression of motility associated genes. In contrast third generation variants showed an increase in the expression of the motility genes, an increase in the genes associated with the putative bacteriophage immunity factor CRISPR and reduced expression of Mu genes. Studies conducted on pigs demonstrated that a single pig can be colonised by campylobacters belonging to multiple genotypes and species. Comparative genomic hybridisation (CGH) of C. coli and C. jejuni isolated from the intestines of a single pig demonstrated these isolates shared plasmid and chromosomal encoded genes, and therefore may have undergone inter-species gene transfer due to cohabitation of a common intestinal niche. The aim of this thesis is to genotypically characterise Campylobaeter strains from chicken and pig in ideal atmospheric conditions. Our hypothesis is that Campylobacter can be grown in vitro both in gas replacement jar (ORJ) and in MACS and the molecular characterisation by transcriptomic analysis and CGH of the strains will be ideal in an atmospheric condition which is stress free.
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Garg, Nitanshu. "Copper, cytochromes and Campylobacter." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22930/.

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Books on the topic "Campylobacter"

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Nachamkin, Irving, Christine M. Szymanski, and Martin J. Blaser, eds. Campylobacter. Washington, DC, USA: ASM Press, 2008. http://dx.doi.org/10.1128/9781555815554.

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Irving, Nachamkin, Szymanski Christine M, and Blaser Martin J, eds. Campylobacter. 3rd ed. Washington, DC: ASM Press, 2008.

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Butcher, James, and Alain Stintzi, eds. Campylobacter jejuni. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6536-6.

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Menge, H., M. Gregor, G. N. J. Tytgat, and B. J. Marshall, eds. Campylobacter pylori. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83322-9.

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Backert, Steffen, ed. Fighting Campylobacter Infections. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65481-8.

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International Workshop on Campylobacter Infections (5th 1989 Puerto Vallarta, Mexico). Campylobacter V: Proceedings of the Fifth International Workshop on Campylobacter Infections, Puerto Vallarta, Mexico, 25 February-1 March, 1989. Mexico, D.F: Department of Infectious Diseases, Instituto Nacionalde la Nutricion., 1991.

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United States. Food Safety and Inspection Service. Campylobacter questions and answers. Washington, D.C.?]: U.S. Dept. of Agriculture, Food Safety and Inspection Service, 1991.

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editor, Méric Guillaume, and Swansea University, eds. Campylobacter ecology and evolution. Norfolk, UK: Caister Academic Press, 2014.

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Food, Great Britain Advisory Committee on the Microbiological Safety of. Interim report on Campylobacter. London: H.M.S.O., 1993.

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Ottenjann, R., and W. Schmitt, eds. Aktuelle Gastroenterologie — Campylobacter pylori. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-85515-3.

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Book chapters on the topic "Campylobacter"

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Debruyne, Lies, Dirk Gevers, and Peter Vandamme. "Taxonomy of the Family Campylobacteraceae." In Campylobacter, 1–25. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch1.

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On, Stephen L. W., Noel McCarthy, William G. Miller, and Brent J. Gilpin. "Molecular Epidemiology of Campylobacter Species." In Campylobacter, 191–211. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch10.

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van Bergen, Marcel A. P., Jos P. M. van Putten, Kate E. Dingle, Martin J. Blaser, and Jaap A. Wagenaar. "Isolation, Identification, Subspecies Differentiation, and Typing of Campylobacter fetus." In Campylobacter, 213–25. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch11.

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Fitzgerald, Collette, Jean Whichard, and Irving Nachamkin. "Diagnosis and Antimicrobial Susceptibility of Campylobacter Species." In Campylobacter, 227–43. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch12.

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Jacobs, Bart C., Alex van Belkum, and Hubert P. Endtz. "Guillain-Barré Syndrome and Campylobacter Infection." In Campylobacter, 245–61. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch13.

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Zhang, Qijing, and Paul J. Plummer. "Mechanisms of Antibiotic Resistance in Campylobacter." In Campylobacter, 263–76. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch14.

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Gerner-Smidt, Peter, Steven G. Stroika, and Collette Fitzgerald. "National Molecular Subtyping Network for Food-Borne Bacterial Disease Surveillance in the United States." In Campylobacter, 277–85. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch15.

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Watson, Robert O., and Jorge E. Galán. "Interaction of Campylobacter jejuni with Host Cells." In Campylobacter, 287–96. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch16.

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Hu, Lan, and Dennis J. Kopecko. "Cell Biology of Human Host Cell Entry by Campylobacter jejuni." In Campylobacter, 297–313. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch17.

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Larson, Charles L., Jeffrey E. Christensen, Sophia A. Pacheco, Scott A. Minnich, and Michael E. Konkel. "Campylobacter jejuni Secretes Proteins via the Flagellar Type III Secretion System That Contribute to Host Cell Invasion and Gastroenteritis." In Campylobacter, 315–32. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815554.ch18.

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Conference papers on the topic "Campylobacter"

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Dantas, Joao Victor Jose de Barros, PAULO ROBERTO ELEUTÉRIO DE SOUZA, and NARA SUZY AGUIAR FREITAS. "VARIAÇÃO E PADRÕES DE CONSERVAÇÃO ENTRE DIFERENTES CEPAS DE CAMPYLOBACTER JEJUNI PARA O GENE GYRA." In I Congresso Nacional de Pesquisas e Estudos Genéticos On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/geneticon/8298.

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Introdução: Polimorfismos de nucleotídeo único no gene gyrA têm sido relacionados com resistência antimicrobiana à infecção por Campylobacter jejuni. Com o passar dos anos, a ciência avançou com diversos medicamentos, entre eles os antimicrobianos. Entretanto, concomitantemente ao advento dos antimicrobianos, mais especificamente os antibióticos, notou-se uma certa resistência aos diversos mecanismos de atuação desses aliados contra agentes patogênicos. O grupo abordado neste trabalho foi a espécie Campylobacter jejuni. Objetivo: O objetivo deste estudo foi avaliar, através de análises comparativas, procurando regiões de alta similaridade e pequenas variações em regiões específicas do gene gyrA de Campylobacter jejuni depositado em um banco de dados NCBI. Material e Método: Um total de 18 sequências genômicas completas do gene gyrA de Campylobacter jejuni foram baixadas e alinhadas pelo software Clustalw. As análises comparativas mostraram regiões com dois grupos distintos de genomas. Resultados: O primeiro grupo apresentou regiões com alto grau de similaridade e também regiões com pequena variação de bases. No segundo grupo, todos os genomas foram 100% semelhantes. Assim, sugerimos que essa variação está relacionada à localização geográfica e origem (organismo, hospedeiro e isolados da alimentação humana) dessas sequências. Conclusão: Em conclusão, é possível que variações e padrões de genes estejam associados à história evolutiva, genética e ecológica dos genomas. Além disso, percebe-se que os genótipos de Campylobacter jejuni que apresentavam o gene gyrA, estavam associados aos organismos que foram isolados de hospitais, criações bovinas e criações aviárias, demonstrando a alta relação desse agente patogênico com o uso exacerbado de antibióticos. Dado isto, é de suma importância estudos futuros para investigar mais genes de resistência à antimicrobianos, visando a melhor alternativa para contornar essa situação que impacta cada vez mais todos os cenários da sociedade.
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Gaull, Florian, Thomas Alter, Annekathrin Froeb, and Karsten Fehlhaber. "Campylobacter in pigs: an epidemiological study." In Third International Symposium on the Epidemiology and Control of Salmonella in Pork. Iowa State University, Digital Press, 2001. http://dx.doi.org/10.31274/safepork-180809-1087.

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Jensen, A. N., and E. M. Nielsen. "Campylobacter species distribution in outdoor pigs." In Second International Symposium on Epidemiology and Control of Salmonella in Pork. Iowa State University, Digital Press, 2003. http://dx.doi.org/10.31274/safepork-180809-479.

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Kérouanton, A., B. Chidaine, V. Rose, V. Samson, and M. Denis. "Direct detection of Campylobacter from feces of organic and conventional pigs highlighted the presence of Campylobacter lanienae." In Fourth International Symposium on the Epidemiology and Control of Salmonella and Other Food Borne Pathogens in Pork. Iowa State University, Digital Press, 2015. http://dx.doi.org/10.31274/safepork-180809-281.

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Young, Colin R., Alice Lee, and Larry H. Stanker. "Detection of Campylobacter species using monoclonal antibodies." In Photonics East (ISAM, VVDC, IEMB), edited by Yud-Ren Chen. SPIE, 1999. http://dx.doi.org/10.1117/12.335779.

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Kreling, V., and A. Hensel. "Campylobacter jejuni – Phytotherapeutische Möglichkeiten zur Prävention schwerer Gastroenterititen." In Jubiläumskongress Phytotherapie 2021 Leib und Magen – Arzneipflanzen in der Gastroenterologie 50 Jahre Gesellschaft für Phytotherapie. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/s-0041-1731479.

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Boes, Jaap, Eval Møller Nielsen, and Dorte Lau Baggesen. "Campylobacter in finisher pigs - from farm to slaughter." In Sixth International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork. Iowa State University, Digital Press, 2005. http://dx.doi.org/10.31274/safepork-180809-747.

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Borsato-Moysés, Juliano, Sarah Jarschel de Camargo, Maristela da Silva do Nascimento, Neusely da Silva, and Valéria Cristina Amstalden Junqueira. "Quantification of Thermotolerant Campylobacter Spp. in Frozen Chicken Carcasses." In XII Latin American Congress on Food Microbiology and Hygiene. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/foodsci-microal-144.

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Wehebrink, T., N. Kemper, E. grosse Beilage, and J. Krieter. "Carry-over risks in fattening units for Campylobacter spp." In First International Symposium on the Ecology of Salmonella in Pork Production. Iowa State University, Digital Press, 2007. http://dx.doi.org/10.31274/safepork-180809-73.

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Horrocks, Shane M., Yong Soo Jung, Steven C. Rilke, Todd R. Callaway, Thomas S. Edrington, Roger B. Harvey, Robin C. Anderson, and David J. Nisbet. "Effects of nitroethane and 2-nitropropanol against Campylobacter jejuni." In Sixth International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork. Iowa State University, Digital Press, 2005. http://dx.doi.org/10.31274/safepork-180809-750.

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Reports on the topic "Campylobacter"

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Blaser, Martin J., Guillermo Perez, Paul F. Smith, Charlotte Patton, and Fred C. Tenover. Extraintestinal Campylobacter Jejuni and Campylobacter Coli Infections: Host Factors and Strain Characteristics. Fort Belvoir, VA: Defense Technical Information Center, March 1986. http://dx.doi.org/10.21236/ada265464.

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Blaser, Martin J., Janet A. Hopkins, Guillermo I. Perez-Perez, Henry J. Cody, and Diane G. Newell. Antigenicity of Campylobacter Jejuni Flagella. Fort Belvoir, VA: Defense Technical Information Center, March 1986. http://dx.doi.org/10.21236/ada265460.

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Black, Robert E., Myron M. Levine, Mary L. Clements, Timothy P. Hughes, and Martin J. Blaser. Experimental Campylobacter Jejuni Infection in Humans. Fort Belvoir, VA: Defense Technical Information Center, March 1988. http://dx.doi.org/10.21236/ada265410.

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Dame-Korevaar, Anita, Ewa Pacholewicz, Marleen van der Most, Janneke Schreuder, Miriam Koene, Hilko Ellen, Martien Bokma, et al. Beheersing van Campylobacter in de pluimveesector ;: onderzoek naar Campylobacter op Nederlandse vleeskuikenbedrijven en de bijbehorende risicofactoren. Lelystad: Wageningen Bioveterinary Research, 2022. http://dx.doi.org/10.18174/573974.

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Koene, M. G. J., J. A. van der Goot, J. B. W. J. Cornelissen, Ingrid de Jong, Johan Kollenstart, and Mark den Hartog. Maternale antilichamen tegen Campylobacter in eieren van verschillende merken kippen. Wageningen University & Research, 2019. http://dx.doi.org/10.18174/573977.

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Koene, M. G. J., J. A. van der Goot, Ingrid de Jong, and Mark den Hartog. Bevuiling en Campylobacter : Onderzoek naar een mogelijke relatie tussen de mate van bevuiling van levend aangevoerde vleeskuikens en Campylobacter besmettingen tijdens en na het slachtproces. Wageningen University & Research, 2019. http://dx.doi.org/10.18174/574412.

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Teglia, Osvaldo, Noemí Borda, Alejandro García, and Rodolfo Notario. Bacteriemia recurrente debida a Campylobacter fetus en un paciente sin inmunodepresión. Buenos Aires: siicsalud.com, October 2014. http://dx.doi.org/10.21840/siic/143341.

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Dunn, Bruce E., Martin J. Blaser, and Edward L. Snyder. Two-Dimensional Gel Electrophoresis and Immunoblotting of Campylobacter Outer Membrane Proteins. Fort Belvoir, VA: Defense Technical Information Center, April 1987. http://dx.doi.org/10.21236/ada265461.

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Perez-Perez, Guillermo I., Martin J. Blaser, and John H. Bryner. Lipopolysaccharide Structures of Campylobacter fetus are Related to Heat-Stable Serogroups. Fort Belvoir, VA: Defense Technical Information Center, January 1986. http://dx.doi.org/10.21236/ada265573.

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Blaser, Martin J., David N. Taylor, and Peter Echeverria. Immune Response to Campylobacter jejuni in a Rural Community in Thailand. Fort Belvoir, VA: Defense Technical Information Center, February 1986. http://dx.doi.org/10.21236/ada265583.

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