The prophylactic impact of 100% and 50% concentrations of arthropod haemolymph, administered four days before infection with T. b. brucei, is presented in Table . Mice pretreated with haemolymph from grasshopper, cricket, cockroach, crab, and diminazene (Control 1) were able to eliminate T. b. brucei by the 15th day of the experiment. However, the groups pre-treated with haemolymph from scorpions and beetles continued to show active parasites until day 21. Mice in the negative control group (Control 2), which received no prophylactic treatment, succumbed to the infection by day 6. In a similar pattern, mice treated with 50% concentrations of the various arthropod haemolymph four days before infection with T. b. brucei exhibited varied outcomes (Table ). Mice in groups 3-7, which received grasshopper, cricket, cockroach, crab haemolymph, and diminazene (Control 1), respectively, showed no parasitemia by day 15. In contrast, mice in the negative control group (2), which did not receive any pre-treatment or standard drug, died by day 9. Key: 0 parasite (0), 2-4 parasites (+), 8-16 parasites (++), -parasite (no parasitemia observed due to death of mice