The Chesson Strain of Plasmodium vivax in Humans and Different Species of Aotus Monkeys

William E. Collins Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Joann S. Sullivan Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Geoffrey M. Jeffery Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Allison Williams Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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G. Gale Galland Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Douglas Nace Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Tyrone Williams Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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John W. Barnwell Division of Parasitic Diseases, National Center for Zoonotic, Vector-Borne and Enteric Diseases, and Animal Resources Branch, National Centers for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, US Public Health Service, Atlanta, Georgia

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Comparison was made between the parasitemia of Chesson strain Plasmodium vivax in humans and in splenectomized Aotus lemurinus griseimembra, A. nancymaae, A. vociferans, and A. azarae boliviensis monkeys. In the monkeys, 56.3% of the animals had maximum counts > 25,000/μL and in humans 59.6% were above this peak parasitemia. In humans, it took an average of 9.3 days to reach the maximum parasite count. In monkeys with no previous infections, it took an average of 18.9 days to reach the maximum parasite count; for those with previous infections, it took an average of 15 days. Human and nonhuman primate data on this parasite suggest that splenectomized Aotus monkeys, particularly A. lemurinus griseimembra, and to a somewhat lesser extent A. vociferans, can mimic the course of Chesson malaria in humans regarding parasitemia and mosquito infection.

Author Notes

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