Volume 30, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



To learn more about the course of infections in primates, six monkeys with blood-induced infections were followed for 270 days with regular thick blood smears. Three of the monkeys experienced from 1–3 recurrences of parasitemia defined here as ⩾200 organisms/mm blood. Following splenectomy on day 297, parasitemia recurred in all animals, reaching levels of 1.9 × 10 to 2.7 × 10 organisms/mm, and was associated with a moderately severe hemolytic anemia. These findings suggest that similar recurrences of parasitemia may occur in human cases, and that splenectomy may present a risk to persons with a past history of infection.


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