Salmonella in a modern broiler operation: a longitudinal study
Vaughn, J.B.; Williams, L.P.; LeBlanc, D.R.; Helsdon, H.L.; Taylor, C.
American Journal of Veterinary Research 35(5): 737-741
1974
ISSN/ISBN: 0002-9645 PMID: 4830443 Document Number: 81493
A single lot of 10000 birds was followed during a 9-week period to determine if salmonella serotypes found in protein feed ingredient meals (PFIM) at a feed mill could be traced forward in time through a complete feed ration (CFR) fed to broilers on a farm, to broilers during processing, and finally to finished bird carcasses as they were packed for shipment to market. Of a total of 125 samples of PFIM collected at the mill, 34 (27%) contained one or more serotypes, and 41 different serotypes were identified. Of seven loads of CFR delivered to the broiler farm, one (14%) contained salmonella, and one serotype (Salmonella eimsbuettel) was identified. Of a total of 500 samples of viscera collected from broilers during processing, 18 (3.6%) were positive for salmonella, and two serotypes were isolated: S. heidelberg and S. binza. In 250 whole bird carcasses sampled after processing, three (1.2%) were contaminated with salmonella, and one serotype (S. heidelberg) was identified. Although none of the 41 different serotypes recovered from PFIM could be traced sequentially to CFR, to broilers, and to processed carcasses, some were recovered at different stages of the investigation. However, when special laboratory techniques were used to further characterize these isolates, a relationship was not seen. The results in the present study indicated that the heat treatment applied to the CFR as part of the pelleting process was of considerable importance in the reduction of the transmission of salmonellae in this broiler operation.