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Am. J. Trop. Med. Hyg., 68(4), 2003, pp. 410-412
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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A RETROSPECTIVE EXAMINATION OF ANEMIA DURING INFECTION OF HUMANS WITH PLASMODIUM VIVAX

WILLIAM E. COLLINS, GEOFFREY M. JEFFERY, AND JACQUELIN M. ROBERTS
Division of Parasitic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia

A retrospective examination was made of archival data on 98 patient episodes of infection with Plasmodium vivax occurring over a period of 4–11 weeks to document changes in hemoglobin (Hb) concentrations associated with continuing parasitemia. The mean percentage change in the Hb concentration for each of the 10 seven-day intervals was -13.4, -10.9, -4.8, 0.12, 0.94, 4.0, 0.69, 11.6, 2.4, and 8.3, respectively. An equilibrium appeared to be established between weeks 4 and 6. Decreases in Hb concentrations were greatest following the first week of parasitemia. Total restoration to preinfection levels did not occur during persistent parasitemia.

Received May 15, 2002. Accepted for publication December 26, 2002.

Authors’ addresses: William E. Collins and Jacquelin M. Roberts, Division of Parasitic Diseases, Centers for Disease Control and Prevention, Mailstop F-36, 4770 Buford Highway, Atlanta, GA 30341, Telephone: 770-488-3724, Fax: 770-488-4253, E-mail: wec1{at}cdc.gov. G. M. Jeffery (Public Health Service, retired), 1093 Blackshear Drive, Decatur, GA 30033.




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Copyright © 2003 by the American Society of Tropical Medicine and Hygiene.