경남 북부지역 위축자돈에 대한 질병조사

Abstract

This study was investigated to diagnose pathogenic organisms of atrophic piglets in northern area ofthe Gyeongnam province, Korea. Samples such as feces, blood and necropsy specimens of 42 atrophicpiglets (≤10 weeks old) were taken from May to December 2013 for this survey. Samples were examinedby reverse transcriptase-polymerase chain reaction (RT-PCR) assay and bacteria isolation for detectionof pathogenic agents. 93 pathogens were isolated from 42 samples can be classified into llgroups. We identified bacterial agents in 56 cases (60.2%) and viral agents in 31 cases (33.3%). However, 6 cases (6.5%) were undetected. Among these pathogens, the most prevalent disease wereporcine reproductive and respiratory syndrome (PRRS) in 22 cases (23.7%). The major diseases wereColibacillosis in 15 cases (16.1%), Glasser's disease in 12 cases (12.9%), and porcine epidemic disease(PED) in 9 cases (9.7%). Mixed infections were accounted for 77.8% of atrophic piglets. In particular,the rate of mixed infections with PRRS virus showed the highest frequency (71.4%). In addition, thereis a seasonal variation. Viral pathogens were dominantly detected in winter, but in the rest of the seasonbacterial agents were mainly detected. Gastrointestinal diseases occurred mainly in the pre-weaning piglets,the respiratory diseases and wasting diseases occurred mainly in the post-weaning piglets.