Volume 6, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The chimpanzee displays a natural resistance to the blood forms of but allows multiplication and growth of this phase when splenectomized.

The tissue phase of is able to grow and reproduce normally in chimpanzee liver and persists there for at least 39 days. The natural resistance of the chimpanzee to the blood phase is without effect upon the tissue phase of .

is unchanged on passage through chimpanzees and is able to infect man following two chimpanzee-mosquito passages.

is established as an efficient vector of .

Schizonts of in liver pieces of a chimpanzee taken 7, 18 and 39 days after infection with sporozoites are described and discussed.


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