| human serum sensitivities of trypanozoon isolates from naturally infected hosts in the luangwa valley, zambia. | of 235 trypanozoon stocks isolated from naturally infected hosts in northeastern zambia and tested by the blood incubation infectivity test (biit), 176 came from man, 37 from wild-caught tsetse, 11 from wild animals and 11 from domestic livestock. of those from man, 2 gave unexpected, human-serum-sensitive (hss) reactions on first testing; all 15 stocks from tsetse in the northern area (kampumbu) were strongly serum-resistant (hsr) while 22 other infections, from tsetse in the southern area (kak ... | 1991 | 1800082 |