Longitudinal study of Salmonella dispersion and the role of environmental contamination in commercial swine production systems.

Applied and Environmental Microbiology
Paul M DorrWondwossen A Gebreyes

Abstract

This study investigated the roles of various environmental sources, such as truck-washing systems, waste-processing lagoons, and other sources, as potential contributors to the exposure and dissemination of Salmonella in commercial swine production systems. Four cohorts of nursery age swine herds which originated from distinct farm flows were selected. In addition, cross-sectional sampling of four truck wash stations selected based on the types of disinfectants and sources of water used for sanitizing trucks were tested. Salmonella isolates were recovered from pigs (feces, cecal contents, and mesenteric lymph nodes) and environmental sources (barn floor, lagoon, barn flush, trucks, and holding pens). Antimicrobial susceptibility testing and genotyping were conducted using Kirby-Bauer disk diffusion and amplified fragment length polymorphism, respectively. Salmonella prevalence significantly increased with age from late nursery to slaughter for all of the cohorts (P = 0.007). In two of three instances, all three pig holding pens (lairage) sampled at processing were Salmonella positive. The predominant antibiotypes for all sources included ACSSuT (51.8%), SSuT (16.8%), T (6%), and pansusceptible (7.4%). For the isolates obtained ...Continue Reading

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Citations

Nov 15, 2012·Epidemiology and Infection·A F A PiresC A Bolin
Dec 30, 2011·American Journal of Veterinary Research·H Scott HurdBing Wang
Dec 2, 2014·Future Microbiology·Roger SimmUte Römling
Mar 16, 2016·Foodborne Pathogens and Disease·Alda F A PiresCarole Bolin
May 13, 2015·Risk Analysis : an Official Publication of the Society for Risk Analysis·R R L SimonsE L Snary
Jul 10, 2014·Preventive Veterinary Medicine·A F A PiresC Bolin
Aug 17, 2016·Veterinary Microbiology·Laura FernandesConstança Pomba
Aug 24, 2016·Zoonoses and Public Health·A Casanova-HigesR C Mainar-Jaime
Nov 12, 2009·Journal of Food Protection·Ann LetellierSylvain Quessy

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