title: Effect of vincristine sulfate on Pseudomonas infections in monkeys.
abstract: In rhesus monkeys, intravenous challenge with 0.6 x 10(10) to 2.2 x 10(10)Pseudomonas aeruginosa organisms caused acute illness of 4 to 5 days' duration with spontaneous recovery in 13 of 15 monkeys; blood cultures became negative 3 to 17 days after challenge. Leukocytosis was observed in all monkeys. Intravenous or intratracheal inoculation of 2.0 to 2.5 mg of vincristine sulfate was followed by leukopenia in 4 to 5 days. Intravenous inoculation of 4.2 x 10(10) to 7.8 x 10(10) pyocin type 6 Pseudomonas organisms in monkeys given vincristine sulfate 4 days previously resulted in fatal infection in 11 of 14 monkeys, whereas none of four receiving Pseudomonas alone died. These studies suggest that an antimetabolite-induced leukopenia predisposes to severe Pseudomonas sepsis and that such monkeys may serve as a biological model for study of comparative efficacy of antimicrobial agents.
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D001068:Feeding and Eating Disorders / Q000139:chemically induced; D000882:Haplorhini; D006801:Humans; D007958:Leukocyte Count; D007970:Leukopenia / Q000139:chemically induced / Q000150:complications; D008251:Macaca; D011552:Pseudomonas Infections / Q000150:complications; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D013997:Time Factors; D014750:Vincristine / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D014750:Vincristine