Global Status of Porcine circovirus Type 2 and Its Associated Diseases in Sub-Saharan Africa

Table 1

Retrospective studies on earlier occurrence of PCV2 in pigs from some countries of the world.

Country	Sampling period	Reference
Northern Germany	1961–1998	[28]
Belgium	1969	[35]
UK	1970–1997	[36]
Northern Ireland	1970-1971	[37]
Northern Ireland	1973–1999	[38]
Canada	1985	[39]
Spain	1985–1997	[40]