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  • Title: Time-dose response of Trypanosoma congolense bloodstream forms to diminazene and isometamidium.
    Author: Kaminsky R, Chuma F, Wasike RP.
    Journal: Vet Parasitol; 1994 Apr; 52(3-4):235-42. PubMed ID: 8073607.
    Abstract:
    Trypanosoma congolense bloodstream forms were propagated in vitro axenically in a simplified cultivation medium at 34 degrees C. Viability of a drug-sensitive and a drug-resistant clone were examined for 10 days following exposure to 0.1, 1.0 and 10.0 micrograms ml-1 of diminazene aceturate and 0.1, 1.0 and 10.0 ng ml-1 of isometamidium chloride for various time intervals. Drug-sensitive T. congolense were irreversibly damaged after incubation with 10 micrograms ml-1 or 1 microgram ml-1 diminazene aceturate for 30 min or 2 h, respectively, while drug-resistant trypanosomes were not affected. Exposure to 10 ng ml-1 isometamidium chloride eliminated drug-sensitive trypanosomes after 24 h and drug-resistant trypanosomes after 96 h. The data obtained on in vitro time-dose responses of T. congolense were related to pharmacokinetic data of diminazene and isometamidium in cattle plasma.
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