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Veterinary Pathology, Vol 23, Issue 3 293-302, Copyright © 1986 by American College of Veterinary Pathologists

ARTICLES

Experimental visceral leishmaniasis in the owl monkey

J. R. Broderson, W. L. Chapman Jr and W. L. Hanson

Visceral leishmaniasis developed in eight owl monkeys (Aotus trivirgatus) after intravenous inoculation with a Khartoum strain (WR378) of Leishmania donovani. Six monkeys died within 93 days, and two monkeys recovered from the disease. Clinically, signs were weight loss, anemia, and hepatosplenomegaly. Hematologic findings included anemia, granulocytopenia, thrombocytopenia, and lymphocytosis. Analysis of serum or plasma revealed hyperbilirubinemia, azotemia, hyperglobulinemia, hypoalbuminemia, and altered hemostasis. All monkeys developed positive antibody titers to promastigotes of L. donovani and had increases in immunoglobulins M and subsequently G. Liver, spleen, bone marrow, and lymph nodes were the principal organs containing numerous parasitized macrophages. The owl monkey was highly susceptible to L. donovani infection and should be a useful animal model for the study of visceral leishmaniasis.




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Copyright © 1986 by the American College of Veterinary Pathologists.