CD209 and infection: The impact of M. smegmatis, Mtb HN878 and CDC1551 total lipids on HIV-1 X4 and R5 trans-infection via DC-SIGN was minimal compared to the effect M. bovis, Mtb H37Rv and EU127, suggesting that glycolipids from these three strains could bind DC-SIGN thereby blocking virus trans-infection of the target cells.