C Lienhardt - Medical Research Council Laboratories and National TB Control Programme, PO Box 273, Fajara, Banjul, The Gambia
J Rowley - Medical Research Council Laboratories and National TB Control Programme, PO Box 273, Fajara, Banjul, The Gambia
K Manneh - Medical Research Council Laboratories and National TB Control Programme, PO Box 273, Fajara, Banjul, The Gambia