AIMS: In this study, a real-time quantitative polymerase chain reaction (PCR) method was examined for its ability to quantify Campylobacter spp. in chicken carcass rinses and compared with bacteriological culturing. METHODS AND RESULTS: The linearity of the real-time PCR quantification protocol was assessed on pure DNA. The amplification efficiency was 100% and the square regression coefficient (R(2)) was 0.998. Quantification was linear over at least 7 log units. Using a crude cell lysate gave the highest sensitivity and the detection limit of the method was 3.3 log CFU per carcass. The statistical correlation between the bacteriological enumeration and the real-time quantitative (Q)-PCR determined using chicken carcasses sampled at the end of the slaughter line was 0.733. The difference in detection levels was probably because of the detection of stressed, dead or viable but not culturable cells by Q-PCR. CONCLUSION: The real-time Q-PCR method described in this study is a powerful tool for determining the number of Campylobacter cells on carcasses. SIGNIFICANCE AND IMPACT OF THE STUDY: The real-time Q-PCR method is available to quantify the Campylobacter contamination at the slaughterhouse level and could be used to evaluate primary production.
AIMS: In this study, a real-time quantitative polymerase chain reaction (PCR) method was examined for its ability to quantify Campylobacter spp. in chicken carcass rinses and compared with bacteriological culturing. METHODS AND RESULTS: The linearity of the real-time PCR quantification protocol was assessed on pure DNA. The amplification efficiency was 100% and the square regression coefficient (R(2)) was 0.998. Quantification was linear over at least 7 log units. Using a crude cell lysate gave the highest sensitivity and the detection limit of the method was 3.3 log CFU per carcass. The statistical correlation between the bacteriological enumeration and the real-time quantitative (Q)-PCR determined using chicken carcasses sampled at the end of the slaughter line was 0.733. The difference in detection levels was probably because of the detection of stressed, dead or viable but not culturable cells by Q-PCR. CONCLUSION: The real-time Q-PCR method described in this study is a powerful tool for determining the number of Campylobacter cells on carcasses. SIGNIFICANCE AND IMPACT OF THE STUDY: The real-time Q-PCR method is available to quantify the Campylobacter contamination at the slaughterhouse level and could be used to evaluate primary production.
Authors: M H Josefsen; C Löfström; T B Hansen; L S Christensen; J E Olsen; J Hoorfar Journal: Appl Environ Microbiol Date: 2010-06-18 Impact factor: 4.792
Authors: Ruthly François; Pablo Peñataro Yori; Saba Rouhani; Mery Siguas Salas; Maribel Paredes Olortegui; Dixner Rengifo Trigoso; Nora Pisanic; Rosa Burga; Rina Meza; Graciela Meza Sanchez; Michael J Gregory; Eric R Houpt; James A Platts-Mills; Margaret N Kosek Journal: PLoS Negl Trop Dis Date: 2018-02-07
Authors: Jasmien Vandeputte; An Martel; Gunther Antonissen; Marc Verlinden; Lieven De Zutter; Marc Heyndrickx; Freddy Haesebrouck; Frank Pasmans; An Garmyn Journal: Poult Sci Date: 2020-02-14 Impact factor: 3.352