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Kirsten E Lyke

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High levels of Plasmodium falciparum rosetting in all clinical forms of severe malaria in African children.

Ogobara K Doumbo; Mahamadou A Thera; Abdoulaye K Koné; Ahmed Raza; Louisa J Tempest; Kirsten E Lyke; Christopher V Plowe; J Alexandra Rowe (Profiled Authors: Kirsten E Lyke; Christopher Plowe)

Malaria Research and Training Center, Faculty of Medicine, Pharmacy and Dentistry, University of Bamako, Mali. okd@MRTCBKO.org
The American journal of tropical medicine and hygiene 2009;81(6):987-93.

Abstract

Plasmodium falciparum rosetting (the spontaneous binding of infected erythrocytes to uninfected erythrocytes) is a well-recognized parasite virulence factor. However, it is currently unclear whether rosetting is associated with all clinical forms of severe malaria, or only with specific syndromes such as cerebral malaria. We investigated the relationship between rosetting and clinical malaria in 209 Malian children enrolled in a case-control study of severe malaria. Rosetting was significantly higher in parasite isolates from severe malaria cases compared with non-severe hyperparasitemia and uncomplicated malaria controls (F(2,117) = 8.15, P < 0.001). Analysis of sub-categories of severe malaria (unrousable coma, severe anemia, non-comatose neurological impairment, repeated seizures or a small heterogeneous group with signs of renal failure or jaundice) showed high levels of rosetting in all sub-categories, and no statistically significant differences in rosetting between sub-categories (F(4,67) = 1.28, P = 0.28). Thus rosetting may contribute to the pathogenesis of all severe malaria syndromes in African children, and interventions to disrupt rosetting could be potential adjunctive therapies for all forms of severe malaria in Africa.

7 Originating Grant

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