Volume 59, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Infections with the Salvador II strain of Plasmodium vivax in Aotus lemurinus griseimambra monkeys were fed upon by Anopheles freeborni mosquitoes. Periods of mosquito infectivity were determined to establish a model system for the testing of transmission-blocking vaccines. The highest levels of mosquito infection were associated with the ascending asexual parasitemia after reaching 1,000/microl, and before the peak asexual parasite count. Sporozoite-induced infections were more infectious than were trophozoite-induced infections. Secondary episodes of parasitemia were also infectious, indicating the lack of development of naturally developing transmission-blocking immunity to this strain of P. vivax in splenectomized Aotus monkeys following single infections.


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