Prevalence of porcine circovirus type 2 in swine populations in Nam Dan and Yen Thanh district, Nghe An province

Abstract

Porcine circovirus type 2 (PCV2) is a wide spread, important pathogen of domestic swine and the causative agent of post-weaning syndrome and other diseases, known as "porcine circovirus diseases". The objective of this study was to evaluate the prevalence of infection with porcine circovirus-2 (PCV-2) in the post-weaning pigs in 6 communes of Nam Dan and Yen Thanh district, Nghe An province. Result of analyzing 93 samples collected in 2015 by Real time PCR technique showed that all of the investigated communes were infected by PCV2 with an average infection rate of 23.7%. Of which, Hoa Thanh commune accounted for the highest prevalence (29.4%), followed by Phu Thanh and Nam Anh commune (25.0%). The rate of positive samples with PCV2 collecting from pigs with and without symptom of the typical respiratory diseases was 25.0% and 22.2%, respectively. Samples collected from oral cavity, serum and innards were positive with PCV2 to be 23.7%; 22.7% and 24.2%, respectively. Therefore, in order to diagnose PCV diseases, apart from common methods of serum and innards collection, sample collecting from oral cavity is also an effective method. This result seems to be meaningful for the subsequent studies on the prevalence of PCV2 in Nghe An province and for the prevention of diseases caused by PCV2 in the swine herds in Viet Nam.