Distribution,quantitative load and characterization of Salmonella associated with swine farms in upper-northern Thailand     

Pakpoom Tadee  Kittipong Kumpapong  Danai Sinthuya  Panuwat Yamsakul  Nipa Chokesajjawatee  Supachai Nuanualsuwan  Suchawan Pornsukarom  Bayleyegn Z. Molla  Wondwossen A. Gebreyes  Prapas Patchanee 《Journal of veterinary science (Suw?n-si, Korea)》2014,15(2):327-334

This study was conducted to analyze the prevalence and quantitative loads of Salmonella spp. on pig farms in Chiang Mai, Lamphun, Thailand to assess loading levels before slaughtering. The serotype diversity, antimicrobial-resistance pattern and pulse-field type of Salmonella spp. were also characterized to assess the dynamic propagation of the pathogen. The Salmonella-positive prevalence was 246/805 (30.56%), and the quantitative loads varied from 1.48~4.04 Log₁₀MPN/g, with a mean ± standard deviation of 2.11 ± 0.57. AMP/S/TE (ampicillin/streptomycin/tetracycline) was the highest frequency antimicrobial resistance pattern found in this study. In addition, Salmonella Rissen was the primary serotype in this region. PFGE results indicated the occurrence of infection by cross contamination among pig farms. Our study showed that pork is easily contaminated with this pathogen. Farm control programs must be based on strict biosecurity and hygienic measures, which could further reduce the contamination pressure at slaughterhouses or retail shops.  相似文献