Demonstration of microchimerism in pregnant sows and effects of congenital PRRSV infection

Table 2 Results of PRRSV titration, SRY and ZFX PCR in dam sera.

Dam	PRRSV titre log10 TCID₅₀/ml of sera at the day of...		SRY PCR results at the day of...		ZFX PCR results at the day of...
	inoculation	euthanasia	inoculation	euthanasia	inoculation	euthanasia
I₇₀	-	2.3	+	-	+	+
I₉₀-1	-	4.8	-	+	+	+
I₉₀-2	-	3.3	-	+	+	+
I₉₀-3	-	3.3	-	-	+	+
I₉₀-4	-	2.3	-	-	+	+
I₉₀-5^†	-	-	+	+	+	+
Con-1	-	-	-	-	+	+
Con-2	-	-	-	-	+	+
Con-3	-	-	-	-	+	+

PRRSV titres < 1.0 (detection limit) were considered to be negative. ^†Serum from dam I₉₀-5 was also tested at 100 days of gestation and was PRRSV-positive with a PRRSV titre of 2.6 log10 TCID₅₀/mL.

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