Table 2.

Normal and apoptotic intrahepatic natural killer (NK)/NK T cell ratios in pathogenic L2-mouse hepatitis virus type 3 (MHV3)-, low attenuated 51·6-MHV3-, highly attenuated CL12-MHV3- and non-pathogenic YAC-MHV3-infected C57BL/6 mice at various times post-infection.

		Times post-infection (h)
Cell populations	Viral infection†	24	48	72
Normal cells	Mock-infected	0·94 ± 0·04	1·45 ± 0·11	1·35 ± 0·07
	L2-MHV3	1·51 ± 0·10*	2·14 ± 0·95	1·54 ± 0·31
	51·6-MHV3	1·38 ± 0·17*	3·72 ± 0·49**	0·86 ± 0·19*
	CL12-MHV3	1·39 ± 0·23*	1·67 ± 0·09	1·46 ± 0·25
	YAC-MHV3	1·18 ± 0·24	1·36 ± 0·11	1·43 ± 0·04
Apoptotic cells	Mock-infected	0·49 ± 0·14	0·68 ± 0·03	1·67 ± 0·62
	L2-MHV3	0·40 ± 0·18	2·63 ± 0·61**	3·97 ± 0·61**
	51·6-MHV3	0·92 ± 0·69	3·01 ± 0·25***	1·73 ± 0·48
	CL12-MHV3	0·61 ± 0·11	1·25 ± 0·10*	1·73 ± 0·22
	YAC-MHV3	0·62 ± 0·20	1·48 ± 0·18*	2·04 ± 0·31

^*P < 0·05

^**P < 0·01

^***P < 0·001.

^†Three mice were used in each experimental group. The ratios of percentages of NK and NK T cells from MHV3-infected mice were compared with those from mock-infected mice.