[1] UNIV MANITOBA, DEPT MED MICROBIOL, WINNIPEG R3E 0W3, MANITOBA, CANADA
[2] MEM UNIV NEWFOUNDLAND, DEPT MED, ST JOHNS A1B 3B6, NEWFOUNDLAND, CANADA
[3] UNIV NAIROBI, DEPT MED MICROBIOL, NAIROBI, KENYA
[4] CITY COUNCIL SPECIAL TREATMENT CLIN, NAIROBI, KENYA
[5] NATL INST, DEPT MICROBIOL, ANTWERP, BELGIUM