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Studies with induced malarias in Aotus monkeys
Abstract:
Aotus monkeys have been shown to be susceptible to the three most important species of human malaria as well as to simian, ape, and rodent malaria. The parasites natural to man were maintained by serial passages using trophozoite infected blood. It was then possible to transfer the infections to, and among, other New World monkeys which previously were refractory. The parasites retained their viability in the monkey, were infective to mosquitos, and were transmitted between monkeys and back to man. Exoerythrocytic stages, similar to those demonstrated in man, occurred in the Aotus liver. Drugs exerted similar action against the parasites in the monkey as against parasites in man. The human malaria-Aotus model has made possible other extensive studies in various disciplines important to the understanding of the parasites in man. These included parasite biology, host-parasite-vector relationships, immunology, pathology, and physiology.
Insights
The Aotus monkey model effectively replicates human malaria, enabling crucial research into parasite biology and treatment. This primate model facilitates studies on host-parasite interactions and disease pathology.
Area of Science:
- * Primate models in infectious disease research
- * Malariology and tropical medicine
Background:
- * Susceptibility of Aotus monkeys to various malaria species, including human pathogens.
- * Previous refractoriness of many New World monkeys to human malaria parasites.
Purpose of the Study:
- * To establish and validate the Aotus monkey as a reliable model for human malaria.
- * To investigate parasite behavior and host-pathogen interactions within this primate model.
Main Methods:
- * Serial passage of human malaria parasites (Plasmodium species) using infected blood.
- * Infection of Aotus and other New World monkeys, including previously refractory species.
- * Monitoring parasite viability, infectivity to mosquitoes, and transmission dynamics.
Main Results:
- * Successful establishment of human malaria parasites in Aotus monkeys.
- * Demonstration of parasite transmission between monkeys and back to humans.
- * Observation of exoerythrocytic parasite stages in Aotus liver, mirroring human infections.
- * Confirmation of similar drug efficacy in monkeys as in humans.
Conclusions:
- * The Aotus monkey is a viable and valuable model for studying human malaria.
- * This model supports extensive research in parasite biology, immunology, pathology, and host-parasite-vector relationships.
- * Findings contribute to a deeper understanding of malaria in humans and potential therapeutic strategies.