Study on some risky factors affecting the spread of PRRS epidemic in Thai Binh province

Abstract

Situation of PRRS epidemic in Thai Binh province was surveyed at some representative communes of Vu Thu and Kien Xuong districts, Thai Binh province. The study was carried out by analyzing the secondary data and conducting the survey through interviewing the pig raising farmers. The surveyed results showed that in 2013, there were 528 PRRS infection pigs accounting for 0.05% of total pig number in the province. Of which, the number of dead pigs were 104, accounting for 19.70% of the infection pigs. There were 7 risky factors associating with the spread of PRRS epidemic with OR value from 2.10 to 3.05 identified. These factors including: The farms had the main roads passing or located closely to the alive poultry/animal markets; The pigs were not vaccinated for other dangerous diseases; The piglet origin was not clear; The disinfectants were not used for routine disinfection in the farms; The water from community ponds/reservoirs was used in the farms during PRRS outbreak period; The farmers sold the pigs illegally in the areas and periods that PRRS was being outbroken.