Salmonella prevalence in crops of Ontario and Quebec broiler chickens at slaughter

Abstract

Swabs of crop contents of 635 broiler chickens were obtained from 9 Ontario and 12 Quebec processing plants and cultured for Salmonella to determine prevalence in broiler crops. Serotypes of positive cultures were determined to evaluate the serotype profile. The overall prevalence of contamination was low (4.3%). Prevalence was higher in broilers sampled in Quebec (5.8%) than in those sampled in Ontario (2.2%). In Quebec, there were differences in prevalence among the groups of broilers sampled at the various plants. These differences were believed to be attributable to differences in Salmonella prevalence among groups of flocks delivered to the plants due to the limited exposure of the chickens to the plant. The serotype profile of Salmonella isolated from the crops of broilers in this study was similar in several respects to profiles obtained from other surveys of Canadian broiler flocks using either environmental samples or cloacal swabs. Similarities included: predominance of Salmonella hadar and Salmonella heidelberg; several other common serotypes at a low prevalence; little Salmonella enteritidis isolated in other studies, and no S. enteritidis isolated in this study. Results of this field survey of Salmonella in crops of broilers are similar to those of Canadian studies of other internal and environmental sites of broilers. The similarity indicates that monitoring of Salmonella environments of flocks of live broiler chickens should define profiles of Salmonella contamination of the carcasses and would also aid in determination of Salmonella contamination status of broiler flocks. Such information would assist efforts to reduce Salmonella contamination in broiler chickens.

Isolation ofSalmonella entericaSerovar Enteritidis from Houseflies (Musca domestica) Found in Rooms ContainingSalmonellaSerovar Enteritidis-Challenged Hens

“…The primary function of the crop is food storage while the stomach is full. The chicken crop was shown to routinely harbor Salmonella and was touted as an important source of broiler carcass contamination during processing (3,5,11). Birds challenged with Salmonella serovar Enteritidis showed equal levels of colonization of the crop and intestinal tract (23).…”

Prévalence de la contamination parSalmonellades élevages de poulet de chair au Maroc

“…Dans les pays en développement, les rares études disponibles révèlent 100 % d'infection en Thaïlande (Sasipreeyajan et al, 1996), 28,6 % au Sénégal (Cardinale et al, 2004) et 21,7 % au Brésil (Tavechio et al, 2002). Dans les pays développés, la prévalence de Salmonella dans les élevages de poulet de chair varie d'un pays à l'autre : 76,9 % au Canada (Chambers et al, 1998) ; 69,8 % en France (Rose et al, 1999) ; 41,3 % en Turquie (Carli et al, 2001) ; 25 % au Danemark (Chadfield et al, 2001) ; 0,7 % en Finlande et 0,03 % en Suède (Anon, 1998). En revanche, il faut reconnaître que différentes méthodes de prélèvement sont utilisées dans les différentes études ; la comparaison de ces données doit donc être effectuée avec précaution.…”

Salmonellosis and Related Risk Factors in Broiler Flocks in Mazandaran Province, Northern Iran

“…The vertical transmission of these bacteria can also be an important issue in poultry (6,7). Different prevalence rate of these bacteria are reported between countries, nearly 0 in Sweden, 68.2% in Hungary (8), 76.9% in Canada (9); 69.8% in France (10); 41.3% in Turkey (11) and 25% in Denmark (12). Some management and environmental risk factors are associated with the incidence of salmonellosis in the flocks.…”