New strain of Human T Lymphotropic Virus (HTLV) type 3 in a pygmy from Cameroon with peculiar HTLV serologic results Calattini, S. Betsem, E. Bassot, S. Chevalier, S. A. Mahieux, R. /Froment, Alain Gessain, A. A search for human T lymphotropic virus (HTLV) types 1 and 2 and related viruses was performed by serological and molecular means on samples obtained from 421 adult villagers from the southern Cameroon forest areas. One individual (a 56-year-old Baka Pygmy hunter) was found to be HTLV-3 infected; however, there was a low proviral load in blood cells. Complete sequence analysis of this virus (HTLV-3(Lobak18)) indicated a close relationship to human HTLV-3(Pyl43) and simian STLV-3(CTO604) strains. Plasma samples from Lobak18, the HTLV-3 infected individual, exhibited a peculiar "HTLV-2-like" pattern on Western blot analysis and were serologically untypeable by line immunoassay. These results were different from those for the 2 previously reported HTLV-3 strains, raising questions about serological confirmation of infection with such retroviruses. 2009 text https://www.documentation.ird.fr/hor/fdi:010058426 fdi:010058426 Calattini S., Betsem E., Bassot S., Chevalier S. A., Mahieux R., Froment Alain, Gessain A.. New strain of Human T Lymphotropic Virus (HTLV) type 3 in a pygmy from Cameroon with peculiar HTLV serologic results. 2009, 199 (4), 561-564 EN CAMEROUN