TABLE 4.

Correlation between histopathological findings and detection of PCV genomic DNA in lungs and lymphoid organs by single PCR with ORF1 primers

No. of clinical specimensa	Presence of histological lesions		No. of specimens positive by single PCR
	Inclusion bodies	Immunoperoxidase reaction
14b	+	+	13
2c	−	Dd	1
6c	−	−	2

^aThe specimens comprised lungs, lymph nodes, and spleen specimens. 

^bEight of 14 specimens were found to be PRRSV positive. 

^cSubmitted because of respiratory and/or enteric problems. 

^dD, doubtful.