Effect of Blood Group on the Prepatent Period of Inoculated Vivax Malaria

Albert V. MyattLaboratory of Tropical Diseases, National Microbiological Institute, National Institutes of Health, Bethesda 14, Maryland

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G. Robert CoatneyLaboratory of Tropical Diseases, National Microbiological Institute, National Institutes of Health, Bethesda 14, Maryland

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Thomas HernandezLaboratory of Tropical Diseases, National Microbiological Institute, National Institutes of Health, Bethesda 14, Maryland

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Elizabeth GuinnLaboratory of Tropical Diseases, National Microbiological Institute, National Institutes of Health, Bethesda 14, Maryland

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Summary

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.

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