Table 2.

The infection progress of mice inoculated with JS-2012, UL41 null and revertant viruses

Viruses	Dose (TCID50)	Days post inoculation (dpi)
		1	2	3	4	5	6	7	8	9	10
JS-2012	105	–	+	+++ (−*)
	104	–	+	++	++ (−*)
UL41 revertant	105	–	+	+++ (−*)
	104	–	+	+	+++ (−*)
UL41 null	105	–	+	+++	+ (−*)
	104	–	+	+	+	+	–	–	–	–	–

“-”: No nervous signs such as unrest, tickle, depression, and biting the skin

“+”: Nervous signs such as unrest, tickle, depression, and biting the skin and < 50% mortality. “++”: Nervous signs such as unrest, tickle, depression, and biting the skin and 50% mortality. “+++”: Nervous signs such as unrest, tickle, depression, and biting the skin and > 50% mortality

“-*”: All mice died in this group