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Multicenter Study
. 2006 Dec;92(6):1281-5.
doi: 10.1645/GE-911R.1.

Gametocytemia in Plasmodium vivax and Plasmodium falciparum infections

F Ellis Mckenzie  1 , Chansuda Wongsrichanalai, Alan J Magill, J Russ Forney, Barnyen Permpanich, Carmen Lucas, Laura M Erhart, Wendy P O'Meara, David L Smith, Jeeraphat Sirichaisinthop, Robert A Gasser Jr
Affiliations
Multicenter Study

Gametocytemia in Plasmodium vivax and Plasmodium falciparum infections

F Ellis Mckenzie et al. J Parasitol. 2006 Dec.

Abstract

Two expert research microscopists, each blinded to the other's reports, diagnosed single-species malaria infections in 2,141 adults presenting at outpatient malaria clinics in Tak Province, Thailand, and Iquitos, Peru, in May-August 1998, May-July 1999, and May-June 2001. Plasmodium vivax patients with gametocytemia had higher fever and higher parasitemia than those without gametocytemia; temperature correlated with parasitemia in the patients with gametocytemia. Plasmodium falciparum patients with gametocytemia had lower fever than those without gametocytemia, but similar parasitemia; temperature correlated with parasitemia in the patients without gametocytemia. Hematologic data in Thailand in 2001 showed lower platelet counts in P. vivax patients with gametocytemia than in the P. vivax patients without gametocytemia, whereas P. falciparum patients with gametocytemia had similar platelet counts but lower red blood cell counts, hemoglobin levels, hematocrit levels, and higher lymphocyte counts than patients without gametocytemia.

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Figures

Figure 1
Figure 1
Temperatures (C) of patients infected with Plasmodium vivax (left) or Plasmodium falciparum (right), gametocytemic (top) or nongametocytemic (bottom), in Thailand, in 1998 (◆), 1999 (■), and 2001 (△) plotted against asexual parasitemia (log 10).
See this image and copyright information in PMC

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