TABLE 1.

Virological analysis of mice following UV-B reactivation^a

Mouse strain	% positive swabsb	Peak titerc	Total no. of shedding daysd	No. of days of shedding/mousee	Reactivation rate (%)f	Final day of sheddingg
B6	14	3.85 + 0.32	10	1.9 + 0.14	40	5
B6-CD28KO	33	4.79 + 0.34	32	3.7 + 0.3	65	12
BALB/c	11	3.65 + 0.38	8	1.6 + 0.11	35	6
C-CD28KO	28	4.25 + 0.42	28	3.3 + 0.18	55	12

^aData are for 20 mice of each strain.

^bThe percentage of virus-positive eye swabs (140 to 286 eye swab specimens per group) over the 12-day period following UV-B irradiation (P < 0.05 for CD28KO mice).

^cPeak viral titer, which occurred on day 3 postreactivation, expressed as the number of log₁₀ PFU (P < 0.02 for CD28KO mice).

^dTotal number of days that the mice were swab positive (P < 0.01 for CD28KO mice).

^eThe number of days that a positive mouse shed virus (P < 0.05 for CD28KO mice).

^fThe percentage of mice in which virus was reactivated (P < 0.02 for CD28KO mice).

^gThe last day that a mouse was positive for a particular group.