IFNG and infection: Similarly, only low levels of IFN-γ were detected in DC cultures infected with HIV-2 and/or SIVmac (Figure 6B) although the infection rates were similar in HIV-1/SIVmac (7.6±1.7%, n=4; mean value ± SEM) and HIV-2/SIVmac (9.4±2.1%, n=4) exposed cultures.