[1] Univ Zambia, Sch Hlth Sci, Dept Pharm, POB 50110, Lusaka, Zambia
[2] Univ Zambia, Sch Vet Med, Dept Dis Control, POB 32379, Lusaka, Zambia
[3] Univ Zambia, Sch Nat Sci, Dept Biol Sci, POB 32379, Lusaka, Zambia
[4] Univ Zambia, Sch Vet Med, Dept Paraclin Studies, POB 32379, Lusaka, Zambia
[5] Minist Fisheries & Livestock, Dept Vet Serv, Cent Vet Res Inst, POB 50060, Lusaka, Zambia
[6] Inst Minist Hlth, Zambia Natl Publ Hlth, Ndeke House,Haile Selassie Ave,POB 30205, Lusaka, Zambia
[7] Univ Teaching Hosp, Dept Pathol & Microbiol, POB 50110, Lusaka, Zambia
[8] Eden Univ, Sch Med & Hlth Sci, POB 37727, Lusaka, Zambia
[9] Copperbelt Univ, Michael Chilufya Sata Sch Med, POB 21692, Ndola, Zambia
[10] Univ Zambia, Sch Med, Dept Pathol & Microbiol, POB 32379, Lusaka, Zambia
[11] Levy Mwanawasa Med Univ, Sch Hlth Sci, Dept Environm & Occupat Hlth, POB 33991, Lusaka, Zambia
[12] Levy Mwanawasa Med Univ, Sch Hlth Sci, Dept Physiol Sci, POB 33991, Lusaka, Zambia