The Chesson strain of Plasmodium vivax malaria; factors influencing the incubation period.

01 May 1947

The deployment of American forces in the world's highly endemic malarious areas, coupled with the loss of most of the world's quinine-producing countries to the enemy, led, early in the war, to the institution of a malarial research program on a nation-wide scale. In the early part of the study, two American strains of Plasmodium vivax, McCoy and St Elizabeth, were used for clinical testing of new anti-malarial compounds. It soon became apparent that the character of these two strains was different from the Southwest Pacific malaria encountered by the United States army and encountered by Australian investigators.