Table IV.

Results of gel-based polymerase chain reaction (PCR) assays for BVDV in nasal secretions collected from the PI cattle on study days 0 to 342

		Study day
Animal no.	BVDV subtype	0	31	63	98	121	189	342
8232	2a	+	+	+	+	+
8233	2a	+	+	+	+	+	+	+
8234	1b	+	+	+	+	+a	+	+
8235	1a	+	+	+	+	+	+	+
8236	1a	+	+	+	+	+a	+	+
8237	1b	+	+	+	+	+	+	+
8238	1b	+	+	+	+	+	+	+
8239	1b	+	+	+a	+	+a	+	+
8240	1a	+	+	+	+	+	+	+
8241	1a	+	+	+a	+	+	+	+
8242	2a	+	+	+	+
8243	2a	+

^aThe initial result was negative; 1 to 4 retests were required to obtain a positive result.