Peter Lieberzeit

1. IntroductionPorcine reproductive and respiratory syndrome is an important disease in swine industry. The disease has become endemic in many countries throughout the world following an epidemic phase. It is caused by infection with the Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), a small single-stranded, non-segmented RNA virus [1]. The virus is enveloped, spherical and ranges in ...