Table 4.

Blood samples from healthy SPF cats (Group 2) tested for the presence of FCoV over a 6 month period

Duration of culture	Initial blood sample		+2 mo	6 mo later
	2 weeks	3 weeks	3 weeks	None	2 weeks	3 weeks	4 weeks
	By PCR	By probe	By PCR	By PCR	By PCR	By PCR	By PCR	By PCR
FCoV +	6 (43%)	11 (79%)	3 (21%)	4 (57%)	5 (63%)	3 (60%)	2 (40%)	4 (80%)
FCoV −	8	3	11	3	3	2	3	1

mo=months.