Table 1.

Mortality and morbidity rates of each group

Group no. (n)	Designation	Pigs Deaths*		Mortality	Morbidity
		Number	DPI
1(8)	Control	0		0%a	0%a
2(12)	PRRSV	1	13	16.7%b	100%b
		1	21
3(10)	SS7	0		0%a	70%b
4(10) **	PRRSV+SS7	1	10	80%c	100%b
		2	12
		3	13
		2	15

*: Number of pigs and days post inoculation (DPI) when they were euthanized or died due to infection.

**: Two pigs were necropsied on day 7 (when the pigs were not inoculated with SS7).

a, b, c Values with different superscripts are significantly different (P < 0.05) as determined by Fisher's exact test.