. 2012 Mar 7;7(3):e32539. doi: 10.1371/journal.pone.0032539

Table 3. The competition analysis of the transmission efficiency for the transmitted/founder viruses and chronic HIV-1 isolates.

Viral pairs	Variant(co-receptor)	Inoculum viruses (TCID50)	Transmission efficiency^*
BAL and CH040	BAL (R5)	3.0×10⁵	1.72%
	CH040(R5)	1.0×10⁶	1.68%
BAL and CH058	BAL (R5)	1.0×10⁴	0.44%
	CH058(R5)	0.6×10⁴	0.63%

HIV-1 CH040 and CH058 are transmitted/founder viruses and HIV-1 BAL is a chronic isolate.

*The transmission efficiency was calculated by dividing the viral RNA copies in the inoculum with the viral RNA copies of the transmitted variants from the bottom wells. Real-time RT PCR with specific primers/probes set which could discriminate CH040, CH058 and BAL viruses was employed.