Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Prevalence of Lawsonia intracellularis, Brachyspira hyodysenteriae and Salmonella in swine herds | J. Vet. Sci. 2005 6 4 289-293 JOURNAL OF Veterinary Science Prevalence of Lawsonia intracellularis Brachyspira hyodysenteriae and Salmonella in swine herds Dong Kyun Suh1 Jae Chan Song2 1 Research Institute of Health and Environment Daegu 706-841 Korea 2College of Veterinary Medicine Kyungpook National University Daegu 702-701 Korea The prevalence of Lawsonia intracellidaris Brachyspira hyodysenteriae and Salmonella spp. were investigated by multiplex PCR using fecal samples of pigs with diarrhea or a history of diarrhea. The overall herd prevalence of L. intracellularis B. hyodysenteriae and Salmonella spp. were 465 and respectively. Also the prevalence of L. intracellularis B. hyodysenteriae and Salmonella spp. among all sampled pigs were and respectively. Seventeen of 43 herds were positive with 2 enteric organisms and 2 herds were positive with L. intracellularis B. hyodysenteriae and Salmonella spp. simultaneously. It was notable that 11 of 12 herds with more than 2 000 pigs were affected with Salmonella spp. and that only 2 of 12 the herds were affected with B. hyodysenteriae. This study suggested that herds positive for L. intracellularis B. hyodysenteriae and Salmonella spp. were distributed throughout Korea although the relationship among other pathogens such as viral or parasitic ones and or with metabolic disorders was not determined. Key words Brachyspira hyodysenteriae Lawsonia intracel-lularis prevalence Salmonella swine Introduction Porcine proliferative enteropathy PPE swine dysentery SD and porcine salmonellosis PS are bacterial enteric diseases with severe diarrhea and similar in clinical aspects. These diseases have occurred at a growing and finishing stage in swine production cycle and the causative bacteria are transmitted by fecal-oral route. Therefore diagnosis of PPE SD and PS in laboratory requfres special handling of intestinal specimens in time-consuming procedures 7 17 . Corresponding author Tel 82-53-950-5958 .
