TABLE 3.

Uptake of ⁴⁵Ca²⁺ and ⁵¹Cr³⁺ in mock- and rotavirus-infected MA104 cells^a

Infection	Cation	cpm at:
		4 hpi	6 hpi	8 hpi
Mock	45Ca2+	223 ± 9.7	174 ± 13.9	234 ± 21.0
	51Cr3+	118 ± 4.3	89.3 ± 4.6	102 ± 4.6
Virus	45Ca2+	225 ± 15.4†	256 ± 11.5*	532 ± 21.0*
	51Cr3+	104 ± 1.9†	105 ± 4.8†	117 ± 8.3†
Ratio (virus/mock)	45Ca2+	1.0	1.5	2.3
	51Cr3+	0.9	1.2	1.1

^aMA104 cell monolayers were grown to confluency in 24-well Linbro plates and infected. At 4, 6, or 8 h postinfection (hpi), ⁴⁵Ca²⁺ or ⁵¹Cr³⁺ uptake was determined (see Materials and Methods for details). The time of uptake was 10 min in each case. Values correspond to the means ± SEMs from four independent measurements in each case. The virus/mock ratio was calculated from the mean values for each ion at the different times postinfection. *, significantly different from the corresponding value for mock-infected cells by the Mann-Whitney test (P < 0.05); †, not significantly different from the corresponding value for mock-infected cells.