Recent uptake of intermittent preventive treatment during pregnancy with sulfadoxine-pyrimethamine is associated with increased prevalence of Pfdhfr mutations in Bobo-Dioulasso, Burkina Faso
Malaria; Pregnancy; Sulfadoxine-pyrimethamine; Drug resitance; Burkina Faso
Abstract :
[en] Background: The impact of sulfadoxine–pyrimethamine (SP) used as intermittent preventive treatment during pregnancy (IPTp-SP) on mutant parasite selection has been poorly documented in Burkina Faso. This study sought first to explore the relationship between IPTp-SP and the presence of mutant parasites. Second, to assess the Relationship between the mutant parasites and adverse pregnancy outcomes.
Methods: From September to December 2010, dried blood spots (DBS) were collected during antenatal care visits and at delivery from 109 pregnant women with microscopically confirmed falciparum malaria infection. DBS were analysed by PCR–restriction fragment length polymorphism (PCR–RFLP) for the polymorphisms at codons 51, 59, 108 and 164 of the Pfdhfr gene and codons 437 and 540 in the Pfdhps gene. Results: Both the Pfdhfr and Pfdhps genes were successfully genotyped in 92.7% (101/109) of the samples. The prevalence of Pfdhfr mutations N51I, C59R and S108N was 71.3, 42.6 and 64.4%, respectively. Overall, 80.2% (81/101) of samples carried the Pfdhps A437G mutation. None of the samples had the Pfdhfr I164L and the Pfdhps K540E mutations. The prevalence of the triple mutation N51I + C59R + S108N was 25.7% (26/101). The use of IPTp-SP was associated with a threefold increased odds of Pfdhfr C59R mutation [crude OR 3.29; 95% CI (1.44–7.50)]. Pregnant women with recent uptake of IPTp-SP were at higher odds of both the Pfdhfr C59R mutation [adjusted OR 4.26; 95% CI (1.64–11.07)] and the Pfdhfr intermediate-to-high resistance, i.e., ≥ 2 Pfdhfr mutations [adjusted OR 3.45; 95% CI (1.18–10.07)]. There was no statistically significant association between the presence of the Pfdhfr intermediate-tohigh resistance and parasite densities or both maternal haemoglobin level and anaemia.
Conclusion: The data indicate that despite the possibility that IPTp-SP contributes to the selection of resistant parasites, it did not potentiate pregnancy-associated malaria morbidity, suggesting the continuation of SP use as IPTp in Burkina Faso.
Disciplines :
Laboratory medicine & medical technology
Author, co-author :
Cisse, Mamoudou
Awandare, Gordon
Soulama, Alamissa
Tinto, Halidou
Hayette, Marie-Pierre ; Université de Liège > Département des sciences biomédicales et précliniques > Bactériologie, mycologie, parasitologie, virologie
Guiguemdé, Robert
Language :
English
Title :
Recent uptake of intermittent preventive treatment during pregnancy with sulfadoxine-pyrimethamine is associated with increased prevalence of Pfdhfr mutations in Bobo-Dioulasso, Burkina Faso
Alternative titles :
[fr] La prise intermittente de sulfadoxine-pyriméthamine comme traitement préventif antipaludique durant la grossesse est associée à une augmentation de la prévalence de mutations sur le gène Pfdhfr à Bobo-Dioulasso, Burkina Faso
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