RESUMO
The Panama II strain of Plasmodium falciparum, acquired at the second passage level in splenectomized Colombian owl monkeys, was adapted to owl monkeys of Panamanian origin. Patent infections were induced in 22 of 27 unaltered and 20 of 21 splenectomized recipients during 19 serial passages. The infections were significantly more virulent in splenectomized than normal Panamanian owl monkeys, however recrudescences in seven normal monkeys achieved peak parasitemias 48 times greater than in the primary attack. These results describe the first reproducible infections of indigenous falciparum malaria in Panamanian owl monkeys.
Assuntos
Aotus trivirgatus/parasitologia , Cebidae/parasitologia , Malária/parasitologia , Plasmodium falciparum/fisiologia , Adaptação Fisiológica , Animais , PanamáRESUMO
A total of 3,523 wild caught monkeys from Panama was examined for blood parasites from August 1968 through June 1972. Trypanosomes or microfilariae were observed in the blood of 31.1% of the monkeys. Mixed infections, with microfilariae and trypanosomes, were detected in 6.6% of the animals. Trypanosoma cruzi was found in marmosets. Saguinus geoffroyi (12.2%), in white-faced capuchins, Cebus capucinus (5.0%), in squirrel monkeys, Saimiri sciureus (1.7%) and in black spider monkeys, Ateles fusciceps (1.2%). Trypanosoma rangeli was found in S. geoffroyi (55.8%) and C. capucinus (12.5%). Other trypanosomes found in Panamanian monkeys included T. minasense, and T. mycetae. Saguinus geoffroyi showed the highest infection rate (88.9%) with trypanosomes and/or microfilariae; trypanosomes were seen in 68.1%, and microfilariae in 73.0%, of the animals examined. The marmosets, white-faced capuchins, and squirrel monkeys should be considered as significant hosts of T. cruzi in sylvatic habitats and may serve as reservoir hosts of Chagas' disease in Panama. The microfilariae seen in monkeys from Panama were tentatively identified as larval forms of Dipetalonema gracile in Aotus trivirgatus; D. obtusa in C. capucinus and S. geoffroyi; and D. marmosetae in Alowatta villosa, C. capucinus, A. trivirgatus, S. sciureus, A. fusciceps, and S. geoffroyi.