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Cribb DM, Varrone L, Wallace RL, McLure AT, Smith JJ, Stafford RJ, Bulach DM, Selvey LA, Firestone SM, French NP, Valcanis M, Fearnley EJ, Sloan-Gardner TS, Graham T, Glass K, Kirk MD. Risk factors for campylobacteriosis in Australia: outcomes of a 2018-2019 case-control study. BMC Infect Dis 2022; 22:586. [PMID: 35773664 PMCID: PMC9245254 DOI: 10.1186/s12879-022-07553-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 06/09/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We aimed to identify risk factors for sporadic campylobacteriosis in Australia, and to compare these for Campylobacter jejuni and Campylobacter coli infections. METHODS In a multi-jurisdictional case-control study, we recruited culture-confirmed cases of campylobacteriosis reported to state and territory health departments from February 2018 through October 2019. We recruited controls from notified influenza cases in the previous 12 months that were frequency matched to cases by age group, sex, and location. Campylobacter isolates were confirmed to species level by public health laboratories using molecular methods. We conducted backward stepwise multivariable logistic regression to identify significant risk factors. RESULTS We recruited 571 cases of campylobacteriosis (422 C. jejuni and 84 C. coli) and 586 controls. Important risk factors for campylobacteriosis included eating undercooked chicken (adjusted odds ratio [aOR] 70, 95% CI 13-1296) or cooked chicken (aOR 1.7, 95% CI 1.1-2.8), owning a pet dog aged < 6 months (aOR 6.4, 95% CI 3.4-12), and the regular use of proton-pump inhibitors in the 4 weeks prior to illness (aOR 2.8, 95% CI 1.9-4.3). Risk factors remained similar when analysed specifically for C. jejuni infection. Unique risks for C. coli infection included eating chicken pâté (aOR 6.1, 95% CI 1.5-25) and delicatessen meats (aOR 1.8, 95% CI 1.0-3.3). Eating any chicken carried a high population attributable fraction for campylobacteriosis of 42% (95% CI 13-68), while the attributable fraction for proton-pump inhibitors was 13% (95% CI 8.3-18) and owning a pet dog aged < 6 months was 9.6% (95% CI 6.5-13). The population attributable fractions for these variables were similar when analysed by campylobacter species. Eating delicatessen meats was attributed to 31% (95% CI 0.0-54) of cases for C. coli and eating chicken pâté was attributed to 6.0% (95% CI 0.0-11). CONCLUSIONS The main risk factor for campylobacteriosis in Australia is consumption of chicken meat. However, contact with young pet dogs may also be an important source of infection. Proton-pump inhibitors are likely to increase vulnerability to infection.
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Affiliation(s)
- Danielle M Cribb
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, ACT, Australia
| | - Liana Varrone
- Department of Health, Government of Western Australia, Perth, WA, Australia
| | - Rhiannon L Wallace
- Agriculture and Agri-Food Canada, Agassiz Research and Development Centre, Agassiz, BC, Canada
| | - Angus T McLure
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, ACT, Australia
| | - James J Smith
- Food Safety Standards and Regulation, Health Protection Branch, Queensland Health, Brisbane, Qld, Australia.,School of Biology and Environmental Science, Faculty of Science, Queensland University of Technology, Brisbane, Qld, Australia
| | - Russell J Stafford
- OzFoodNet, Communicable Diseases Branch, Queensland Health, Brisbane, Qld, Australia
| | - Dieter M Bulach
- Melbourne Bioinformatics, The University of Melbourne, Melbourne, Vic, Australia.,Microbiological Diagnostic Unit Public Health Laboratory, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Vic, Australia
| | - Linda A Selvey
- Faculty of Medicine, The University of Queensland, Brisbane, Qld, Australia
| | - Simon M Firestone
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Vic, Australia
| | - Nigel P French
- Infectious Disease Research Centre, Massey University, Palmerston North, New Zealand
| | - Mary Valcanis
- Microbiological Diagnostic Unit Public Health Laboratory, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Vic, Australia
| | - Emily J Fearnley
- OzFoodNet, Government of South Australia, Department for Health and Wellbeing, Adelaide, SK, Australia
| | | | - Trudy Graham
- Public Health Microbiology, Forensic and Scientific Services, Queensland Health, Brisbane, Qld, Australia
| | - Kathryn Glass
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, ACT, Australia
| | - Martyn D Kirk
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, ACT, Australia.
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Ricke SC, Feye KM, Chaney WE, Shi Z, Pavlidis H, Yang Y. Developments in Rapid Detection Methods for the Detection of Foodborne Campylobacter in the United States. Front Microbiol 2019; 9:3280. [PMID: 30728816 PMCID: PMC6351486 DOI: 10.3389/fmicb.2018.03280] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 12/17/2018] [Indexed: 12/27/2022] Open
Abstract
The accurate and rapid detection of Campylobacter spp. is critical for optimal surveillance throughout poultry processing in the United States. The further development of highly specific and sensitive assays to detect Campylobacter in poultry matrices has tremendous utility and potential for aiding the reduction of foodborne illness. The introduction and development of molecular methods such as polymerase chain reaction (PCR) have enhanced the diagnostic capabilities of the food industry to identify the presence of foodborne pathogens throughout poultry production. Further innovations in various methodologies, such as immune-based typing and detection as well as high throughput analyses, will provide important epidemiological data such as the identification of unique or region-specific Campylobacter. Comparable to traditional microbiology and enrichment techniques, molecular techniques/methods have the potential to have improved sensitivity and specificity, as well as speed of data acquisition. This review will focus on the development and application of rapid molecular methods for identifying and quantifying Campylobacter in U.S. poultry and the emergence of novel methods that are faster and more precise than traditional microbiological techniques.
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Affiliation(s)
- Steven C. Ricke
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | - Kristina M. Feye
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | | | - Zhaohao Shi
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | | | - Yichao Yang
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
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3
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Generation and characterization of a novel recombinant scFv antibody specific for Campylobacter jejuni. Appl Microbiol Biotechnol 2018; 102:4873-4885. [PMID: 29627856 PMCID: PMC5953994 DOI: 10.1007/s00253-018-8949-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/15/2018] [Accepted: 03/17/2018] [Indexed: 12/11/2022]
Abstract
Campylobacter jejuni is a leading cause of foodborne illness worldwide, mainly due to consumption and handling of contaminated raw chicken. Rapid detection methods for C. jejuni are vital for monitoring contamination levels in chicken products and reducing human Campylobacteriosis cases. The 'gold standard' culture-based method of Campylobacter detection takes 3-5 days and is too slow to permit effective intervention. Immuno-based methods are faster, but usually necessitate use of animals or hybridoma technology to produce antibodies; making them difficult and expensive to produce. Here, we report the generation and characterization of recombinant single-chain variable fragment (scFv) antibodies specific for C. jejuni cells, and evaluation of one scFv antibody for an immunomagnetic separation-quantitative PCR (IMS-qPCR) method to rapidly, sensitively, and specifically detect low numbers of C. jejuni. An scFv antibody phage-display library was constructed using spleen mRNA derived from a rabbit immunized with gamma-irradiated C. jejuni cells. This library was screened by surface biopanning against C. jejuni whole cells. Enriched clones were analyzed by enzyme-linked immunosorbent assay (ELISA). Two scFv antibodies that strongly and specifically recognized C. jejuni cell were expressed in Escherichia coli. Western blot analysis showed that one antibody, scFv80, was expressed as a soluble protein and retained its specific and strong binding to C. jejuni cells. This recombinant monoclonal scFv antibody was purified and used to covalently coat paramagnetic beads to be used for IMS-qPCR. The IMS-qPCR method was able to specifically and sensitively detect C. jejuni in mixed cultures within 3 h.
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4
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Khan JA, Rathore RS, Abulreesh HH, Qais FA, Ahmad I. Prevalence and Antibiotic Resistance Profiles ofCampylobacter jejuniIsolated from Poultry Meat and Related Samples at Retail Shops in Northern India. Foodborne Pathog Dis 2018; 15:218-225. [DOI: 10.1089/fpd.2017.2344] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- Javed Ahamad Khan
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University (AMU), Aligarh, India
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, India
| | - Ram Swaroop Rathore
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, India
| | - Hussein Hasan Abulreesh
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Faizan Abul Qais
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University (AMU), Aligarh, India
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University (AMU), Aligarh, India
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5
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Mangal M, Bansal S, Sharma SK, Gupta RK. Molecular Detection of Foodborne Pathogens: A Rapid and Accurate Answer to Food Safety. Crit Rev Food Sci Nutr 2015; 56:1568-84. [DOI: 10.1080/10408398.2013.782483] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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6
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Isolation and detection of Campylobacter jejuni from chicken fecal samples by immunomagnetic separation–PCR. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.08.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Colak DN, Inan K, Karaoglu H, Canakci S, Belduz AO. Molecular analysis of the genus Anoxybacillus based on sequence similarity of the genes recN, flaA, and ftsY. Folia Microbiol (Praha) 2012; 57:61-9. [PMID: 22223049 DOI: 10.1007/s12223-011-0094-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 12/13/2011] [Indexed: 11/24/2022]
Abstract
Genome predictions based on selected genes would be a very welcome approach for taxonomic studies. We analyzed three genes, recN, flaA, and ftsY, for determining if these genes are useful tools for systematic analyses in the genus Anoxybacillus. The genes encoding a DNA repair and genetic recombination protein (recN), the flagellin protein (flaA), and GTPase signal docking protein (ftsY) were sequenced for ten Anoxybacillus species. The sequence comparisons revealed that recN sequence similarities range between 61% and 99% in the genus Anoxybacillus. Comparisons to other bacterial recN genes indicated that levels of similarity did not differ from the levels within genus Anoxybacillus. These data showed that recN is not a useful marker for the genus Anoxybacillus. A 550-600-bp region of the flagellin gene was amplified for all Anoxybacillus strains except for Anoxybacillus contaminans. The sequence similarity of flaA gene varies between 61% and 76%. Comparisons to other bacterial flagellin genes obtained from GenBank (Bacillus, Pectinatus, Proteus, and Vibrio) indicated that the levels of similarity were lower (3-42%). Based on these data, we concluded that the variability in this single gene makes it a particularly useful marker. Another housekeeping gene ftsY suggested to reflect the G+C (mol/mol) content of whole genome was analyzed for Anoxybacillus strains. A mean difference of 1.4% was observed between the G+C content of the gene ftsY and the G+C content of the whole genome. These results showed that the gene ftsY can be used to represent whole G+C content of the Anoxybacillus species.
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Affiliation(s)
- Dilsat Nigar Colak
- Department of Biology, Faculty of Sciences, Karadeniz Technical University, Trabzon, Turkey
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8
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Levin RE. Campylobacter jejuni: A Review of its Characteristics, Pathogenicity, Ecology, Distribution, Subspecies Characterization and Molecular Methods of Detection. FOOD BIOTECHNOL 2007. [DOI: 10.1080/08905430701536565] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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GLYNN BARRY, LAHIFF SINEAD, WERNECKE MARTINA, BARRY THOMAS, SMITH TERRYJ, MAHER MAJELLA. Current and emerging molecular diagnostic technologies applicable to bacterial food safety. INT J DAIRY TECHNOL 2006. [DOI: 10.1111/j.1471-0307.2006.00253.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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10
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Mandrell RE, Harden LA, Bates A, Miller WG, Haddon WF, Fagerquist CK. Speciation of Campylobacter coli, C. jejuni, C. helveticus, C. lari, C. sputorum, and C. upsaliensis by matrix-assisted laser desorption ionization-time of flight mass spectrometry. Appl Environ Microbiol 2005; 71:6292-307. [PMID: 16204551 PMCID: PMC1265991 DOI: 10.1128/aem.71.10.6292-6307.2005] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Multiple strains of Campylobacter coli, C. jejuni, C. helveticus, C. lari, C. sputorum, and C. upsaliensis isolated from animal, clinical, or food samples have been analyzed by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). Whole bacterial cells were harvested from colonies or confluent growth on agar and transferred directly into solvent and then to a spot of dried 3-methoxy-4-hydroxycinnamic acid (matrix). Multiple ions in the 5,000- to 15,000-Da mass range were evident in spectra for each strain; one or two ions in the 9,500- to 11,000-Da range were consistently high intensity. "Species-identifying" biomarker ions (SIBIs) were evident from analyses of multiple reference strains for each of the six species, including the genome strains C. jejuni NCTC 11168 and C. jejuni RM1221. Strains grown on nine different combinations of media and atmospheres yielded SIBI masses within +/-5 Da with external instrument calibration. The highest-intensity C. jejuni SIBIs were cytosolic proteins, including GroES, HU/HCj, and RplL. Multiple intraspecies SIBIs, corresponding probably to nonsynonymous nucleotide polymorphisms, also provided some intraspecies strain differentiation. MALDI-TOF MS analysis of 75 additional Campylobacter strains isolated from humans, poultry, swine, dogs, and cats revealed (i) associations of SIBI type with source, (ii) strains previously speciated incorrectly, and (iii) "strains" composed of more than one species. MALDI-TOF MS provides an accurate, sensitive, and rapid method for identification of multiple Campylobacter species relevant to public health and food safety.
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11
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Nam HM, Srinivasan V, Murinda SE, Oliver SP. Detection ofCampylobacter jejuniin Dairy Farm Environmental Samples Using SYBR Green Real-Time Polymerase Chain Reaction. Foodborne Pathog Dis 2005; 2:160-8. [PMID: 15992311 DOI: 10.1089/fpd.2005.2.160] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to evaluate a SYBR Green based real-time PCR assay using well-characterized primers to detect Campylobacter jejuni in naturally contaminated dairy farm environmental samples. Specificity of the assay was determined with 62 C. jejuni strains and 120 non-C. jejuni strains. Peak melting temperature obtained with melting curves specific for C. jejuni was 77.5 degrees C. Standard curves were constructed using mean threshold cycle (C(T)) and various concentrations of C. jejuni ranging from 10(0) to 10(8) colony forming units (CFU)/mL, which resulted in a linear relationship between C(T) and log input DNA. Correlation coefficients of standard curves based on pure culture of C. jejuni in broth and spiked cells in lagoon water were R(2) = 0.995 (slope = 3.21) and R(2) = 0.988 (slope = 3.22), respectively, and sensitivity limits were <10 and >10(3) CFU/mL, respectively. After 24-h enrichment, total C. jejuni counts of all samples spiked with 10(0) CFU/mL reached >10(5) CFU/mL, and the detection limit was improved from >10(3) CFU/mL to <10 CFU/mL of inoculum in broth. Eighty-two dairy farm environmental samples, including fecal slurry, feed/silage, lagoon water, drinking water, bulk tank milk, farm soil, and bedding material, were analyzed. The real-time PCR assay detected C. jejuni in 25 (30.4%) of 82 samples, with 17 (68%) of these samples being culture positive for C. jejuni. All samples that were positive by standard culture methods were also positive by the real-time PCR method. Mean C( T ) values of 48-h enriched cultures for 17 PCR-positive/culture-positive samples and eight PCR-positive/culture-negative samples were 21.4 +/- 3.6, and 34.6 +/- 1.5 (p < 0.0001), respectively. C( T ) values for negative samples were >38.0. These results indicate that the SYBR Green real-time PCR assay provides a specific, reproducible, and simple method for detecting C. jejuni in dairy farm environmental samples.
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Affiliation(s)
- H M Nam
- Food Safety Center of Excellence, 59 McCord Hall, The University of Tennessee, Knoxville, TN 37996, USA
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12
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Keramas G, Bang DD, Lund M, Madsen M, Bunkenborg H, Telleman P, Christensen CBV. Use of culture, PCR analysis, and DNA microarrays for detection of Campylobacter jejuni and Campylobacter coli from chicken feces. J Clin Microbiol 2004; 42:3985-91. [PMID: 15364980 PMCID: PMC516363 DOI: 10.1128/jcm.42.9.3985-3991.2004] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2003] [Revised: 01/27/2004] [Accepted: 05/03/2004] [Indexed: 11/20/2022] Open
Abstract
A DNA microarray for detection of Campylobacter spp. was recently developed and applied to detect Campylobacter spp. directly from chicken feces. Sixty-five pooled chicken cloacal swab samples from 650 individual broiler chickens were included in the study. The results of Campylobacter sp. detection obtained with DNA microarrays were compared to those obtained by conventional culture and gel electrophoresis. By conventional culture, 60% of the samples were positive for either Campylobacter jejuni or Campylobacter coli. By PCR and capillary electrophoresis, 95% of the samples were positive for Campylobacter spp., whereas with DNA microarrays all samples were positive for Campylobacter spp. By application of DNA microarray analysis, the isolates in 4 samples (6%) could not be identified to the species level, whereas by PCR-capillary electrophoresis, the isolates in 12 samples (19%) remained unidentified. Interestingly, PCR-capillary electrophoresis analysis revealed that two (3%) of the samples were positive for both C. jejuni and C. coli, while DNA microarray analysis revealed that nine (14%) of the samples were positive for both species. Of 65 samples, 2 samples were identified to contain C. coli by conventional culture but were positive for C. jejuni by both PCR-capillary electrophoresis and DNA microarray analysis. The discrepancy between the methods is discussed.
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Affiliation(s)
- Georgios Keramas
- MIC-Department of Micro and Nanotechnology, Technical University of Denmark, DTU-Building 345 east, DK-2800 Kongens Lyngby, Denmark
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13
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Keramas G, Bang DD, Lund M, Madsen M, Rasmussen SE, Bunkenborg H, Telleman P, Christensen CBV. Development of a sensitive DNA microarray suitable for rapid detection of Campylobacter spp. Mol Cell Probes 2003; 17:187-96. [PMID: 12944122 DOI: 10.1016/s0890-8508(03)00052-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Campylobacter is the most common cause of human acute bacterial gastroenteritis worldwide, widely distributed and isolated from human clinical samples as well as from many other different sources. To comply with the demands of consumers for food safety, there is a need for development of a rapid, sensitive and specific detection method for Campylobacter. In this study, we present the development of a novel sensitive DNA-microarray based detection method, evaluated on Campylobacter and non-Campylobacter reference strains, to detect Campylobacter directly from the faecal cloacal swabs. The DNA-microarray method consists of two steps: first, both universal bacterial sequences and specific Campylobacter sequences (size range: 149-307 bp) are amplified and fluorescently labeled using multiplex-PCR, targeting the 16S rRNA, the 16S-23S rRNA intergenic region and specific Campylobacter genes. Secondly, the Cy5 labeled PCR-amplicons are hybridised to immobilised capture probes on the microarray. The method allows detection of three to thirty genome equivalents (6-60 fg DNA) of Campylobacter within 3 h, with a hands on time of only 15 min. Using the DNA-microarrays, two closely related Campylobacter species, Campylobacter jejuni and Campylobacter coli could be detected and differentiated directly from chicken faeces. The DNA-microarray method has a high potential for automation and incorporation into a dedicated mass screening microsystem.
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Affiliation(s)
- Georgios Keramas
- Mikroelektronik Centret (MIC), Technical University of Denmark, Building 345 East, Kongens 2800, Lyngby, Denmark
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Cheng Z, Griffiths MW. Rapid detection of Campylobacter jejuni in chicken rinse water by melting-peak analysis of amplicons in real-time polymerase chain reaction. J Food Prot 2003; 66:1343-52. [PMID: 12929818 DOI: 10.4315/0362-028x-66.8.1343] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Five DNA extraction protocols for the detection of Campylobacter spp. by polymerase chain reaction (PCR) were compared. A method involving Triton X-100 produced template DNA of sufficient quality to allow the detection of Campylobacter jejuni at levels of 100 CFU/ml in pure culture. Primers were designed on the basis of the cadF gene sequence. With a SYBR Green I real-time PCR assay, these primers amplified only sequences present in C. jejuni to produce a product with a melting temperature of 81.5 degrees C. None of the strains of Campylobacter coli, Campylobacter lari, or Campylobacter fetus tested produced this product during the PCR assay. Other noncampylobacter species tested were shown not to possess the cadF sequence. The real-time PCR combined with a rapid, simple Triton X-100 DNA extraction protocol made it possible to detect < 10 CFU of C. jejuni per ml of chicken rinse within 14 h.
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Affiliation(s)
- Zhihui Cheng
- Department of Food Science, University of Guelph, 43 McGilvray Street, Guelph, Ontario, Canada N1G 2W1
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15
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Lund M, Wedderkopp A, Wainø M, Nordentoft S, Bang DD, Pedersen K, Madsen M. Evaluation of PCR for detection of Campylobacter in a national broiler surveillance programme in Denmark. J Appl Microbiol 2003; 94:929-35. [PMID: 12694459 DOI: 10.1046/j.1365-2672.2003.01934.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To develop and evaluate a rapid and sensitive PCR method for detection of Campylobacter spp. directly from chicken faeces. METHODS AND RESULTS DNA was isolated from faecal swabs using magnetic beads followed by PCR using a prealiquoted PCR mixture, which had been stored in the freezer. The result could be obtained in <6 h. The method was evaluated on 1282 samples from the Danish surveillance programme for Campylobacter in broilers by comparing with conventional culture. The diagnostic specificity was calculated to be 0.99. The detection limits of the PCR method and of the conventional culture were compared using spiked control material. For both methods the detection limit was 36 CFU ml-1. CONCLUSIONS It was concluded that the PCR proved useful for detection of Campylobacter in pooled cloacal swabs from broilers. SIGNIFICANCE AND IMPACT OF THE STUDY By taking cloacal samples in the broiler flocks the technique can be used as an important tool for planning and directing the broiler slaughtering process. This will be a great help in minimizing the risk of contaminating Campylobacter-free flocks at the abattoir.
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Affiliation(s)
- M Lund
- Danish Veterinary Institute, Arhus N, Denmark.
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Gavín R, Merino S, Altarriba M, Canals R, Shaw JG, Tomás JM. Lateral flagella are required for increased cell adherence, invasion and biofilm formation by Aeromonas spp. FEMS Microbiol Lett 2003; 224:77-83. [PMID: 12855171 DOI: 10.1016/s0378-1097(03)00418-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two types of flagella are responsible for motility in mesophilic Aeromonas strains. A polar unsheathed flagellum is expressed constitutively that allows the bacterium to swim in liquid environments and, in media where the polar flagellum is unable to propel the cell, Aeromonas express peritrichous lateral flagella. Recently, Southern blot analysis using a DNA probe based on the Aeromonas caviae Sch3N lateral flagellin gene sequence showed a good correlation between strains positive for the DNA probe, swarming motility and the presence of lateral flagella by microscopy. Here, we conclude that the easiest method for the detection of the lateral flagellin gene(s) is by PCR (polymerase chain reaction); this showed good correlation with swarming motility and the presence of lateral flagella. This was despite the high degree of DNA heterogeneity found in Aeromonas gene sequences. Furthermore, by reintroducing the laf (lateral flagella) genes into several mesophilic lateral-flagella-negative Aeromonas wild-type strains, we demonstrate that this surface structure enhances the adhesion to and invasion of HEp-2 cells and the capacity for biofilm formation in vitro. These results, together with previous data obtained using Laf- mutants, demonstrate that lateral flagella production is a pathogenic feature due to its enhancement of the interaction with eukaryotic cell surfaces.
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Affiliation(s)
- Rosalina Gavín
- Departamento Microbiología, Facultad Biología, Universidad Barcelona, Diagonal 645, 08071 Barcelona, Spain
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Padungtod P, Hanson R, Wilson DL, Bell J, Linz JE, Kaneene JB. Identification of Campylobacter jejuni isolates from cloacal and carcass swabs of chickens in Thailand by a 5' nuclease fluorogenic polymerase chain reaction assay. J Food Prot 2002; 65:1712-6. [PMID: 12430691 DOI: 10.4315/0362-028x-65.11.1712] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A rapid 5' nuclease fluorogenic polymerase chain reaction (PCR) assay for identifying Campylobacter jejuni was applied to Campylobacter isolates from chicken cloacal and carcass swabs collected from three chicken farms and a slaughterhouse in Thailand. The primers and the probe were based on the sequence of the gyrA gene in C jejuni. C. jejuni isolates were identified by fluorogenic PCR assay of bacterial cells directly from Campylobacter-selective agar medium. This assay allowed the identification of C. jejuni within 1 day after colonies appeared on selective media. The fluorogenic PCR assay yielded results comparable to those of the conventional test kit (kappa = 0.76) but required less time. When the two methods disagreed with regard to species identification, results were confirmed by PCR restriction fragment length polymorphism of 23S rRNA genes. In these instances, the fluorogenic PCR assay correctly identified more isolates of C. jejuni than did the conventional test kit (six of seven isolates were unidentifiable by the conventional test kit). The fluorogenic PCR assay is a rapid and specific method that outperforms the conventional test kit in the identification of C. jejuni from environmental samples.
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Affiliation(s)
- Pawin Padungtod
- Population Medicine Center, Michigan State University, East Lansing 48824-1314, USA
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18
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Abstract
A rapid, sensitive, and specific polymerase chain reaction (PCR) assay was developed for the direct detection of Campylobacter in environmental samples from hatcheries. PCR, with a set of primers specific for the Campylobacter flaA short variable region (SVR), detected the presence of Campylobacter in both fluff and eggshell samples; however, a determination of whether the organism was living or dead could not be made. Conventional cultural methods detected no Campylobacter from the same samples. An additional benefit of the direct PCR assay is it allows for the production of a product that can be sequenced to provide further epidemiologic information.
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Affiliation(s)
- Kelli L Hiett
- United States Department of Agriculture, Agricultural Research Service, Poultry Microbiological Safety Research Unit, Athens, GA 30604-5677, USA
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19
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Apajalahti JH, Kettunen A, Bedford MR, Holben WE. Percent G+C profiling accurately reveals diet-related differences in the gastrointestinal microbial community of broiler chickens. Appl Environ Microbiol 2001; 67:5656-67. [PMID: 11722920 PMCID: PMC93357 DOI: 10.1128/aem.67.12.5656-5667.2001] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Broiler chickens from eight commercial farms in Southern Finland were analyzed for the structure of their gastrointestinal microbial community by a nonselective DNA-based method, percent G+C-based profiling. The bacteriological impact of the feed source and in-farm whole-wheat amendment of the diet was assessed by percent G+C profiling. Also, a phylogenetic 16S rRNA gene (rDNA)-based study was carried out to aid in interpretation of the percent G+C profiles. This survey showed that most of the 16S rDNA sequences found could not be assigned to any previously known bacterial genus or they represented an unknown species of one of the taxonomically heterogeneous genera, such as Ruminococcus or Clostridium. The data from bacterial community profiling were analyzed by t-test, multiple linear regression, and principal-component statistical approaches. The percent G+C profiling method with appropriate statistical analyses detected microbial community differences smaller than 10% within each 5% increment of the percent G+C profiles. Diet turned out to be the strongest determinant of the cecal bacterial community structure. Both the source of feed and local feed amendment changed the bacteriological profile significantly, whereas profiles of individual farms with identical feed regimens hardly differed from each other. This suggests that the management of typical Finnish farms is relatively uniform or that hygiene on the farm, in fact, has little impact on the structure of the cecal bacterial community. Therefore, feed compounders should have a significant role in the modulation of gut microflora and consequently in prevention of gastrointestinal disorders in farm animals.
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20
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Che Y, Li Y, Slavik M. Detection of Campylobacter jejuni in poultry samples using an enzyme-linked immunoassay coupled with an enzyme electrode. Biosens Bioelectron 2001; 16:791-7. [PMID: 11679257 DOI: 10.1016/s0956-5663(01)00222-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
An enzyme-linked immunoassay coupled with a tyrosinase modified enzyme electrode was used for rapid detection of Campylobacter jejuni. The immunomagnetic separation (IMS) method was investigated to achieve optimal isolation of C. jejuni cells. Eight types of beads with three different sizes and function groups were coated with anti-C. jejuni to isolate C. jejuni from the sample solution. Bead size and coating methods were found to be major factors that influenced the capture efficacy. Streptavidin-labeled beads (2.8 microm) provided the greatest capture ability. Three blocking reagents were tested to minimize non-specific binding. Bovine serum albumin (BSA) showed the best blocking capability. Two IMS formats were tested. Competitive immunoassay cut the detection time to 1.5 h, but the detection limit was relatively high (10(6) CFU/ml). This system was evaluated using C. jejuni pure culture and poultry samples inoculated with C. jejuni. This detection method for C. jejuni could be completed within 2.5 h and had a detection limit of 2.1 x 10(4) CFU/ml. No significant difference was found between pure culture samples and poultry samples (P>0.01). A linear relationship was found between C. jejuni cell numbers and the peak current ratio in a range of 10(2)-10(7) CFU/ml (R(2)=0.94).
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Affiliation(s)
- Y Che
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA
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21
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Denis M, Refrégier-Petton J, Laisney MJ, Ermel G, Salvat G. Campylobacter contamination in French chicken production from farm to consumers. Use of a PCR assay for detection and identification of Campylobacter jejuni and Camp. coli. J Appl Microbiol 2001; 91:255-67. [PMID: 11473590 DOI: 10.1046/j.1365-2672.2001.01380.x] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Campylobacter contamination in French chicken production from the farm to the consumer was determined using a PCR assay for bacteria detection and identification. METHODS AND RESULTS Samples were bird droppings from poultry houses, neck skins, livers, hearts, gizzards, wings, legs and escalopes from slaughterhouses and gizzards, legs, drumstick, breast and escalopes from a supermarket. Bacterial DNA extraction was performed after an enrichment step in a broth and was followed by PCR. An internal control (IC) was used for both DNA extraction and PCR. Campylobacter were detected in 79.2% of poultry houses. Of the 303 samples, 201 were Campylobacter-positive (i.e. 66.3%) including 43.2% faecal samples, 5.6% slaughterhouse samples and 17.5% supermarket samples. There was no significant difference between the molecular method and the conventional culture technique for Campylobacter detection whatever the samples. The sensitivity was 5 UFC g(-1) of samples and 1.5 x 10(3) UFC ml(-1) of enrichment broth. The use of IC revealed PCR inhibition in 13 samples and problems in the DNA extraction in five samples. CONCLUSION Significant Campylobacter contamination affects all stages of French chicken production. SIGNIFICANCE AND IMPACT OF THE STUDY The understanding of Campylobacter contamination at different levels of chicken production and the determination of the best place(s) for intervention are important for significantly decreasing Campylobacteriosis. Our technique is rapid and can be used on different chicken samples for Campylobacter detection and identification.
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Affiliation(s)
- M Denis
- Unité HQPAP, Agence Française de Sécurité Sanitaire des Aliments, Ploufragan, France
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22
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BANG DANGDUONG, PEDERSEN KARL, MADSEN MOGENS. DEVELOPMENT OF A PCR ASSAY SUITABLE FOR CAMPYLOBACTER SPP. MASS SCREENING PROGRAMS IN BROILER PRODUCTION. ACTA ACUST UNITED AC 2001. [DOI: 10.1111/j.1745-4581.2001.tb00233.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Houng HS, Sethabutr O, Nirdnoy W, Katz DE, Pang LW. Development of a ceuE-based multiplex polymerase chain reaction (PCR) assay for direct detection and differentiation of Campylobacter jejuni and Campylobacter coli in Thailand. Diagn Microbiol Infect Dis 2001; 40:11-9. [PMID: 11448558 DOI: 10.1016/s0732-8893(01)00251-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A novel ceuE-based multiplex PCR system was developed as an efficient diagnostics test to detect and differentiate C. jejuni and C. coli. There is no cross reactivity between C. jejuni and C. coli. In addition, the assay does not produce a positive signal from other enteric bacteria including Salmonella, Shigella and Escherichia coli strains. Campylobacter detection sensitivity was determined to be equivalent to previously reported PCR for other enteric bacteria. We also noticed that silicon dioxide extraction can improve Campylobacter detection sensitivity from infected stool samples. It was demonstrated that the PCR assay developed in this study had a much better Campylobacter detection rate than the traditional culturing method (77% versus 56%). However, we also identified small numbers of culture positive stools (8%, or 16 out of 202 samples) that did not yield PCR positive results for Campylobacter. These PCR negative/culture positive stools were proven to be inhibitory to PCR amplification.
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Affiliation(s)
- H S Houng
- Department of Enteric Infections, Walter Reed Army Institute of Research, Silver Spring, MD 20910-7500, USA
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24
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Englen MD, Kelley LC. A rapid DNA isolation procedure for the identification of Campylobacter jejuni by the polymerase chain reaction. Lett Appl Microbiol 2000; 31:421-6. [PMID: 11123549 DOI: 10.1046/j.1365-2672.2000.00841.x] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have developed an efficient process for rapidly isolating campylobacter DNA using mechanical disruption combined with the guanidine-based reagent DNAzol. Template DNA was isolated by this method from cultures of Campylobacter jejuni resistant to lysis by boiling or enzymes and identified following polymerase chain reaction (PCR) amplification using primers specific for the hippuricase gene. Direct detection of campylobacters in poultry-processing samples by PCR is demonstrated in chicken carcass rinses spiked with lysis-resistant C. jejuni. Our results indicate that this method of DNA isolation may be ideal for direct PCR detection of pathogenic bacteria in complex samples of widely varied origin, especially when the target organisms are difficult to lyse by other means.
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Affiliation(s)
- M D Englen
- Poultry Microbiological Safety Research Unit, Richard B. Russell Agricultural Research Center, USDA Agricultural Research Service, Athens, GA 30604-5677, USA.
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26
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O'Sullivan NA, Fallon R, Carroll C, Smith T, Maher M. Detection and differentiation of Campylobacter jejuni and Campylobacter coli in broiler chicken samples using a PCR/DNA probe membrane based colorimetric detection assay. Mol Cell Probes 2000; 14:7-16. [PMID: 10725058 DOI: 10.1006/mcpr.1999.0274] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Campylobacter enteritis in humans has been linked to consumption of poultry meat. Surveys show that 30-100% of poultry harbour Campylobacter as normal flora of the digestive tract which indicates a need to identify prevalent organism types in flocks and trace their epidemiology. In this study we describe a Campylobacter genus specific polymerase chain reaction (PCR) assay, amplifying the 16 S-23 S rRNA intergenic spacer region with an internal Campylobacter genus specific DNA probe and species specific probes for Campylobacter jejuni and Campylobacter coli designed for confirmation of the amplified PCR products by Southern blot and colorimetric reverse hybridization assays. The specificity of this assay was established by testing a range of food pathogens. Broiler chicken samples were tested following presumptive positive identification by the Malthus System V analyser (Malthus Instruments, UK). The combined PCR and colorimetric reverse hybridization assay is easy to perform and faster than conventional methods for confirmation and identification of Campylobacter species.
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Affiliation(s)
- N A O'Sullivan
- DNA Diagnostics, National Diagnostics Centre, Galway, Ireland
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27
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Waage AS, Vardund T, Lund V, Kapperud G. Detection of small numbers of Campylobacter jejuni and Campylobacter coli cells in environmental water, sewage, and food samples by a seminested PCR assay. Appl Environ Microbiol 1999; 65:1636-43. [PMID: 10103261 PMCID: PMC91231 DOI: 10.1128/aem.65.4.1636-1643.1999] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A rapid and sensitive assay was developed for detection of small numbers of Campylobacter jejuni and Campylobacter coli cells in environmental water, sewage, and food samples. Water and sewage samples were filtered, and the filters were enriched overnight in a nonselective medium. The enrichment cultures were prepared for PCR by a rapid and simple procedure consisting of centrifugation, proteinase K treatment, and boiling. A seminested PCR based on specific amplification of the intergenic sequence between the two Campylobacter flagellin genes, flaA and flaB, was performed, and the PCR products were visualized by agarose gel electrophoresis. The assay allowed us to detect 3 to 15 CFU of C. jejuni per 100 ml in water samples containing a background flora consisting of up to 8, 700 heterotrophic organisms per ml and 10,000 CFU of coliform bacteria per 100 ml. Dilution of the enriched cultures 1:10 with sterile broth prior to the PCR was sometimes necessary to obtain positive results. The assay was also conducted with food samples analyzed with or without overnight enrichment. As few as </=3 CFU per g of food could be detected with samples subjected to overnight enrichment, while variable results were obtained for samples analyzed without prior enrichment. This rapid and sensitive nested PCR assay provides a useful tool for specific detection of C. jejuni or C. coli in drinking water, as well as environmental water, sewage, and food samples containing high levels of background organisms.
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Affiliation(s)
- A S Waage
- Department of Bacteriology, National Institute of Public Health, 0403 Oslo, Norway.
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28
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Vanniasinkam T, Lanser JA, Barton MD. PCR for the detection of Campylobacter spp. in clinical specimens. Lett Appl Microbiol 1999; 28:52-6. [PMID: 10030032 DOI: 10.1046/j.1365-2672.1999.00474.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The suitability of PCR (based on the amplification of the 16S rRNA gene) for use as a diagnostic test for the detection of Campylobacter spp. in human faecal specimens was assessed. A total of 493 faecal specimens from patients with symptoms of enteritis were tested for the presence of campylobacters using PCR. Results were compared with those obtained from the analyses of the same specimens by culture techniques, using chi 2 square with Fisher's exact test. PCR was found to detect significantly more positive specimens than culture (chi 2 = 200.086; P < 0.0001). The sensitivity and specificity of PCR when compared with the culture technique were found to be 91 and 97%, respectively. It is proposed that the PCR is a reliable and sensitive method which may be used as a routine diagnostic technique for the detection of campylobacters in clinical specimens.
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Affiliation(s)
- T Vanniasinkam
- School of Pharmacy and Medical Sciences, University of South Australia, Australia
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29
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Takeshi K, Ikeda T, Kubo A, Fujinaga Y, Makino S, Oguma K, Isogai E, Yoshida S, Sunagawa H, Ohyama T, Kimura H. Direct detection by PCR of Escherichia coli O157 and enteropathogens in patients with bloody diarrhea. Microbiol Immunol 1997; 41:819-22. [PMID: 9403509 DOI: 10.1111/j.1348-0421.1997.tb01934.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Direct detection of Escherichia coli O157 and foodborne pathogens associated with bloody diarrhea were achieved using polymerase chain reaction (PCR) after the preparation of DNA from stool specimens using the microspin technique. PCR was compared with cultivation and toxin production tests with respect to the efficiency of detection of each pathogen; E. coli O157, Vibrio parahaemolyticus, Salmonella serovar Enteritidis and Campylobacter jejuni. Detection of some or all of the above pathogens in clinical stool specimens was achieved using PCR. The minimum number of cells required for the detection of the above pathogens by PCR was 10(1) CFUs/0.5 g of stool sample. PCR was completed within 6 hr. The above pathogens were also detected in cultivation and toxin production tests. Partial purification of the template DNA using the microspin technique was essential for the elimination of PCR inhibitors from the DNA samples. This PCR method is an accurate, easy-to-read screening method for the detection of Shiga-like toxin producing E. coli O157 and enteropathogens associated with bloody diarrhea in stool specimens.
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Affiliation(s)
- K Takeshi
- Hokkaido Institute of Public Health, Sapporo, Japan
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30
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Winstanley C, Morgan JAW. The bacterial flagellin gene as a biomarker for detection, population genetics and epidemiological analysis. MICROBIOLOGY (READING, ENGLAND) 1997; 143 ( Pt 10):3071-3084. [PMID: 9353913 DOI: 10.1099/00221287-143-10-3071] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Craig Winstanley
- Biosciences Group, School of Natural and Environmental Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - J Alun W Morgan
- Horticulture Research International, Wellesbourne, Warwickshire CV35 9EF, UK
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