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Various forms of Karuho poisoning are a common traditional mystery and a public health challenge in Goma city, North Kivu in DRC practiced by unscrupulous people. Its signs and symptoms are commonly mistaken by local communities and medical world with those of tuberculosis, HIV/AIDS and typhoid fever; with neurological and psychological symptoms. Study investigated sub-acute toxicity of Karuho poison on brain of Wistar albino rats. Laboratory based experimental study was conducted at Department of Pharmacology & Therapeutics, Makerere University College of Health Sciences. A total of 4 Karuho poisons (OMGKRP, DLNKRP, CHKRP and BHKRP) were screened for acute and sub-acute toxicity. Fifty animals, 10 in each group were daily dosed for 28 days with 1 mg, 5 mg, 20 mg and 5000 mg/kg bwt of OMGKRP (most active following screening) and normal saline for control group using OECD 407 and NIH 2011 guidelines. Behavioral changes were noted. Histopathological changes in brain regions were analyzed. Treated rats by OMGKRP, most active Karuho poison, were associated with sign of depression, piloerection and shortness of breath. Histopathological changes revealed moderate diffuse congestion and mononuclear inflammatory cells infiltration (plasma cells, lymphocytes and macrophage) in cerebral region with severe inflammation observed in meninges of cerebellum. OMGKRP poison induced inflammation of meninges of cerebellar region of brain.

Toxicity Profile of Karuho Poison on the Brain of Wistar Albino Rats