In Malaysia, a recent seroprevalence
study indicated that 89.2 % of the sera tested were seropositive
against PRRS virus (Vania and Ooi 2012). This indicates the
importance of proper monitoring of PRRS in Malaysian pig
farms.
In general, a tentative diagnosis of PRRS can be made base
on clinical signs, such as reproduction problems in breeding
stocks and respiratory disease. However, since clinical signs
of PRRSV are not consistent and the virus does not cause
specific lesions, differential tests are needed to achieve a