%0 Journal Article %T Quantitative Microbiological Evaluation of <i>Salmonella</i> Typhimurium Shed in Diarrhea, Loose, and Normal Stools of Infected Pigs %A Tsuyoshi Tanaka %A Yasuo Imai %A Naosuke Kumagae %A Takashi Sasaki %A Narutoshi Ochiai %A Katsuyoshi Uruno %A Haruki Kitazawa %A Tadao Saito %A Shizuo Sato %J Open Journal of Veterinary Medicine %P 58-66 %@ 2165-3364 %D 2014 %I Scientific Research Publishing %R 10.4236/ojvm.2014.44007 %X

Control of within-herd transmission of Salmonella is important for reducing the prevalence of this organism on pig farms and for preventing Salmonella-contamination of pork. At the farm level, understanding the within-herd transmission of Salmonella can lead to more effective control. Salmonella infection is dependent on the inoculation dose; hence, quantitative evaluation of Salmonella shed in feces would provide useful information for developing effective measures. In this study, to reproduce and evaluate the number of Salmonella shed in diarrhea, loose stools, and normal feces, weaned pigs were inoculated with 3.2 กม 109, 3.2 กม 107, and 3.2 กม 105 cfu of Salmonella Typhimurium, respectively. The number of S. Typhimurium shed in the feces peaked within 1 week post-inoculation in every group and the most amount of diarrhea and loose stools were observed within 2 weeks post-inoculation. Diarrhea occurred 10 times (six pigs), and loose stools were observed 25 times (11 pigs). The average concentration of S. Typhimurium shed in diarrhea, loose stools, and normal feces was 1.0 กม 108, 1.6 กม 104, and 7.1 กม 10