TABLE 1.

Cellular tropism of CVB4 E2 in human thymocytes^a

Cell type	Mean no. of copies of RNA/10 ng of rRNA ± SD
	Positive-strand RNA	Negative-strand RNA
DP	5,900 ± 110*	850 ± 190*
SP4	1,400 ± 570	60 ± 1
SP8	12 ± 17	<10

^aCVB4-infected FTOC were harvested 7 days after inoculation, and positive- and negative-strand CVB4 RNAs were assessed in sorted DP, SP4, and SP8 cells by quantitative RT-PCR. *, P < 0.05 DP versus SP4 and SP8 (n = 3).