[1] Fdn Congolaise Rech Med, Cite OMS, Villa D6, Brazzaville, Rep Congo
[2] Univ Ouagadougou, Ctr Rech Biomol Pietro Annigoni CERBA, Ouaga, Burkina Faso
[3] Chantal Biya Int Reference Ctr, Yaounde, Cameroon
[4] Univ Yaounde I, Fac Med & Biomed Sci, Yaounde, Cameroon
[5] Univ Yaounde I, Fac Sci, Yaounde, Cameroon
[6] Univ Teaching Hosp, UNZA UCLMS Project, Lusaka, Zambia
[7] Univ Aarhus, Inst Clin Med, DK-8000 Aarhus C, Denmark
[8] Royal Hosp, Muscat, Oman
[9] UCL, Div Infect & Immun, Ctr Clin Microbiol, London, England
[10] UCL Hosp, Natl Inst Hlth Res Biomed Res Ctr, London, England
[11] Univ Marien Ngouabi, Fac Sci & Tech, Brazzaville, Rep Congo
[12] Univ Tubingen, Inst Trop Med, Tubingen, Germany