Anti-plasmodial activities of Combretum molle (Combretaceae) [Zwoo] seed extract in Swiss albino mice.

Objective: Objective of the study was to evaluate in vivo anti-plasmodial activities of Combretum molle seed extract.

Methods: As a standard protocol, initially the acute toxicity of the plant seed extract was checked following single administration of crude seed extract of the plant at doses 500, 1000 and 2000 mg/kg. This was followed by evaluation of anti-plasmodial activity of crude seed extract of the plant following a 4 days suppressive test.

Results: In acute toxicity study sign of toxicity was not observed. Also physical and behavioural changes were not detected. The crude seed extract of C. molle showed, 63.5% parasite suppression in mice infected with Plasmodium berghei ANKA (PbA) murine parasite and treated with 250 mg/kg of seed extract of C. molle. Relative survival time of mice treated with 250 mg/kg showed significantly longer survival than the negative control, while lower than mice treated with the standard drug, chloroquine. The plant seed extract on day-4 post-infection showed significant (P < 0.05) protection against body weight reduction, high body temperature and hemolysis of RBC at relatively lower doses. At optimum dose the crude extract of C. molle seed has good chemo-suppressive activity against PbA parasite and improved some clinical symptoms of malaria in mice.