Volume 30, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Splenectomized monkeys of Peruvian origin were tested for their susceptibility to infection with different species of . Strains of from Vietnam and El Salvador produced infections in eight animals with maximum parasite densities ranging from 2,000–280,000 per mm. A strain of from Cambodia produced maximum parasitemias in five animals ranging from 8–25% of the red blood cells infected. Although two monkeys inoculated with had maximum parasitemias of 31% and 42%, treatment was not necessary for animal survival. Three monkeys infected with via the bites of infected mosquitoes had maximum parasitemias of from 25-41%; these animals died of their infections. Nine animals were infected with ; maximum parasitemias in seven of these animals with no prior history of malarial infection ranged from 49,500 per mm to 11%; two animals with prior experience with and had maximum parasitemias of 65 and 13,200 per mm. No infections were obtained in animals inoculated with or .


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