Vilmos Palya

Main textPorcine circovirus type 2 (PCV2) was first described in 1998 [1], and since then, it has become one of the most important pig pathogens, contributing to considerable economic losses by a syndrome called porcine circovirus disease (PCVD). The virus has demonstrated the highest evolution rate among similar DNA viruses, resulting in genetic shifts even over the rather short period of time si ...

1. IntroductionAmong viral diseases affecting poultry production Newcastle disease (ND) is one of the most common and serious one [1]. It is caused by viruses of genus Orthoavulavirus, Avian orthoavulavirus 1 species [2] formerly designated as Avian avulavirus 1, that are commonly known as Avian paramyxovirus 1 (APMV 1) or Newcastle disease viruses (NDV). The virulent forms of NDV cause a devastat ...

Introduction Gumboro Disease, more properly called Infectious Bursal Disease (IBD), is one of the most important viral diseases of chickens. The virus responsible for this condition (IBDV) can be found in almost all farms and countries. Many studies have already been conducted on this disease but more are still needed to better understand the consequences of the genetic and antigenic variations ...