Effect of blood group on the prepatent period of inoculated vivax malaria.

In 33 nonimmune subjects who received one million Plasmodium vivax parasites in blood compatible with that of the recipients the mean prepatent period was 3.7 days. In 21 nonimmune individuals of blood group O who received one million parasites of P. vivax in incompatible blood of group A donors the mean prepatent period was 11.3 days.

Full text article: http://www.ajtmh.org/content/journals/10.4269/ajtmh.1954.3.981