A study of Campylobacterjejuni on a broiler chicken farm between 1989 and 1994 gave an estimated isolation rate of 27% (3,304 of 12,233) from a 0.9% sample of 1.44 million broiler chickens from six to eight sheds over 32 consecutive rearing flocks comprising 251 broiler shed flocks.
During the study, C.
Jejuni was found in 35.5% of the 251 shed flocks but only 9.2% (23 of 251) had Campylobacter isolates in successive flocks, with 9 of those 23 sheds having the same serotype between consecutive flocks, indicating a low level of transmission between flocks.
Analysis of a systematic sample of 484 of 3,304 (14.6%) C. jejuni isolates showed that 85% were of 10 serotype complexes but 58% were of 3 serotype complexes, indicating a high degree of strain similarity throughout the entire study.
The three commonest types were detected in 8 of 32 flocks during the 5-year study period, suggesting an intermittent common external Campylobacter source.
This hypothesis was tested by a retrospective cohort analysis of C. jejuni rates and types by reference to hatchery supplier of the 1-day-old chicks.
Isolation rates of C. jejuni and frequency distribution of types were determined in 6-week-old broiler chickens identified by the hatchery supplying the original chicks.
The isolation rate of C. jejuni in broilers, supplied by hatchery A, was 17.6%, compared to 42.9% (P<0.0001) for broilers reared from chicks supplied by hatchery B. (...)
Mots-clés Pascal : Campylobacter jejuni, Campylobacteraceae, Bactérie, Poulet, Aves, Vertebrata, Ecloserie, Elevage, Chaîne fabrication, Aliment, Contamination biologique, Transmission, Prévalence, Epidémiologie, Angleterre, Grande Bretagne, Royaume Uni, Europe
Mots-clés Pascal anglais : Campylobacter jejuni, Campylobacteraceae, Bacteria, Chicken, Aves, Vertebrata, Hatchery, Rearing, Production line, Food, Biological contamination, Transmission, Prevalence, Epidemiology, England, Great Britain, United Kingdom, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0075607
Code Inist : 002A35B05. Création : 21/05/1997.