Affiliation: | ICDDR,B: Centre for Health and Population Research, Dhaka-1000,1 Microbiology Department, Chittagong Medical College, Chittagong, Bangladesh,3 Veterinary Laboratories Agency, New Haw, Addlestone KT15 3NB, United Kingdom,2 Unité de Génétique Moléculaire Bactérienne, Institut Pasteur, 75724 Paris Cedex 15, France4 |