Abstract
Serotypes and genotypes of 154 Erysipelothrix rhusiopathiae strains from slaughter pigs at Sueyoshi and Kanoya Meat Inspection Centers in southern Kyushu during the period of April 2004 to March 2006 were determined. The strains were classified into four serotypes, 1a (53 strains), 1b (4 strains), 2 (95 strains) and 11 (2strains). Randomly amplified polymorphic DNA (RAPD) analysis categorized the strains into four genotypes, A (47 strains), B (6 strains), C (91 strains) and D (10 strains). Combination of the serotypes and genotypes formed two major types, 1a-A (47 strains; 29.9%) and 2-C (91 strains; 54.5%). The strains belonging to the major type la-A were isolated only from internal iliac lymph nodes and arthritic fluid, while the strains of the another major type 2-C were isolated from urticaria, kidneys, spleens, and knots of endocarditis. Multiple RAPD types were detected from some farms, but each major RAPD type appeared at the individual farms where the incidence of erysipelas was found to be high. The prevalence of acryflavin resistance among the strains was31.0%(47/154).
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