Susceptibility of Anopheles Quadrimaculatus and A. Albimanus to Domestic and Foreign Strains of Plasmodium Vivax

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  • National Institutes of Health, National Microbiological Institute, Laboratory of Tropical Diseases, Milledgeville, Ga., Columbia, S. C., and Memphis, Tenn.
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The relative susceptibility of Anopheles quadrimaculatus and two strains of A. albimanus (Panama and Florida Keys strains) to three strains of Plasmodium vivax was determined. The strains of vivax included a U. S. strain (St. Elizabeth), a New Guinea strain (Chesson), and vivax of Korean origin.

In all cases A. quadrimaculatus showed a high degree of susceptibility, while the two strains of albimanus either were completely non-susceptible, as in the Korean vivax, or became infected only occasionally and at a very low rate.

The infectivity of Korean vivax to A. quadrimaculatus, and transmission through that species, confirms the possibility of establishment of malaria from that area in this country.