White Blood Cell Counts and Malaria
Abstract
White blood cells (WBCs) were counted in 4697 individuals who presented to outpatient malaria clinics in Maesod, Tak Province, Thailand, and Iquitos, Peru, between 28 May and 28 August 1998 and between 17 May and 9 July 1999. At each site and in each year, WBC counts in the Plasmodium falciparum infected patients were lower than those in the Plasmodium vivax infected patients, which, in turn, were lower than those in the uninfected patients. In Thailand, one-sixth of the P. falciparum infected patients had WBC counts of !4000 cells/mL. Leukopenia may confound population studies that estimate parasite densities on the basis of an assumed WBC count of 8000 cells/mL. For instance, in the present study, use of this conventional approach would have overestimated average asexual parasite densities in the P. falciparum infected patients in Thailand by nearly one-third.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 09, 2005
- Accession Number
- ADA469110
Entities
People
- Alan J. Magill
- Barnyen Permpanich
- Carmen Lucas
- Chansuda Wongsrichanalai
- F. E. Mckenzie
- J. R. Forney
- Robert A. Gasser Jr.
- Wendy A. Prudhomme
Organizations
- National Institutes of Health