Abstract
Porcine epidemic diarrhea virus (PEDV) is a Coronavirus that caused an enteric infectious disease with high death rate for piglets particularly newborn. A survey on PEDV infection in sows was carried out in Tien Giang province. Blood samples from unvaccinated PED sows were collected. Antibodies against PEDV was determined by ELISA test with Porcine epidemic diarrhea virus antibody test kit, SwinecheckR PED indirect - Biovet – Canada. Results showed that a PEDV prevalence of sows was 33.72%. The highest prevalence was found in Cho Gao district (59.22%), then in Cai Lay (27.66%), Cai Be (14.52%) and lowest rate was in Chau Thanh district (10.20%). The highest PED antibody positive rate was found in the herd of the size from over 50 sows (34.95%). These rates for the herd size of 20-50 sows and under 20 sows were 33.66%, and 31.58% respectively. The positive rate of the sows that have given 4-5 litters and over 5 litters were 56.67% and 38.59% respectively. While these rates for sows given 2 and 3 litters were 33.33% and 27.5% respectively. Analysing the risk factors to PED suspected epidemic showed that, the highest risk factor was not disinfectant housing or disinfecting fewer than one time per every 2 weeks. The others were without disinfectant pits in the house; near distance to the disease outbreaking farm.
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