Comparison of the environmental survival characteristics of Salmonella Dublin and Salmonella Typhimurium

Veterinary Microbiology
M KirchnerRobert Davies

Abstract

To examine possible correlations in bovine Salmonella isolates between environmental survival and serovar-associated epidemiological patterns, bovine field isolates of Salmonella serovars Typhimurium and Dublin (two each) were inoculated into bovine faeces slurry and tested monthly by culture for survival during a six-month period of storage at a variable ambient temperature in a disused animal transporter. Low moisture conditions, where the slurry was dried onto wooden dowels, increased detectable survival of a low-level inoculum by up to five months, compared with wet slurry. A more modest increase of survival time was seen with storage of wet slurry under refrigeration at 4°C. Under both dry and wet conditions, the concentration of culturable Salmonella Typhimurium declined at a slower rate than did that of Salmonella Dublin. Salmonella that was naturally contaminating bovine faeces from farms with Salmonella Typhimurium did not show superior survival times compared with Salmonella Typhimurium that had been artificially inoculated into samples. The differing survival characteristics of the two serovars that was observed in environmental faeces may complement their different modes of infection in cattle. Salmonella Dublin, be...Continue Reading

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Citations

Mar 18, 2016·Emerging Infectious Diseases·Liljana PetrovskaRobert A Kingsley
Jan 23, 2016·Preventive Veterinary Medicine·Estelle C C ÅgrenJenny Frössling
Nov 6, 2018·Journal of Applied Microbiology·K A NybergJ Elving
Apr 17, 2020·Journal of Food Protection·Zeynal TopalcengizMichelle D Danyluk

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