Increased Plasmodium falciparum gametocyte production in mixed infections with P. malariae.
SourceAmerican Journal of Tropical Medicine and Hygiene, 78, 3, (2008), pp. 442-8
Article / Letter to editor
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American Journal of Tropical Medicine and Hygiene
SubjectN4i 3: Poverty-related infectious diseases; N4i 4: Auto-immunity, transplantation and immunotherapy; NCMLS 1: Immunity, infection and tissue repair; NCMLS 1: Infection and autoimmunity; UMCN 4.1: Microbial pathogenesis and host defense
Plasmodium falciparum and P. malariae occur endemically in many parts of Africa. Observations from malariotherapy patients suggest that co-infection with P. malariae may increase P. falciparum gametocyte production. We determined P. falciparum gametocyte prevalence and density by quantitative nucleic acid sequence-based amplification (QT-NASBA) after antimalarial treatment of Kenyan children with either P. falciparum mono-infection or P. falciparum and P. malariae mixed infection. In addition, we analyzed the relationship between mixed species infections and microscopic P. falciparum gametocyte prevalence in three datasets from previously published studies. In Kenyan children, QT-NASBA gametocyte density was increased in mixed species infections (P = 0.03). We also observed higher microscopic prevalences of P. falciparum gametocytes in mixed species infections in studies from Tanzania and Kenya (odds ratio = 2.15, 95% confidence interval = 0.99-4.65 and 2.39, 1.58-3.63) but not in a study from Nigeria. These data suggest that co-infection with P. malariae is correlated with increased P. falciparum gametocytemia.
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