Table 2. Virus excretion in PS2Tg2576 mice latently infected with PRV.

Strain	Virus infection	Virus excretion					Total		Chi-squared value
		Day 1	Day 2	Day 3	Day 4	Day 5	Positive	Negative
PS2Tg2576	Latently infected	0/8	4/8	6/8	5/8	3/6	18	20	0.001037511	a
	Noninfected	0/3	0/3	0/3	0/3	0/3	0	15	0.000136546	b
C57BL/6	Latently infected	1/3	0/3	1/3	1/3	1/3	4	11	0.168260983	c

Data on virus excretion are shown as the number of mice that showed virus presence in nasal swabs by PCR. Total means the total number of mice that were positive or negative for virus presence in nasal swabs from Day 1 to Day 5. The chi-squared values were compared. a: The PS2Tg2576 latently infected group versus noninfected group. b: The PS2Tg2576 noninfected group versus the C57BL/6 latently infected group. c: The PS2Tg2576 latently infected group versus the C57BL/6 latently infected group.