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The purpose of this study is to determine the efficacy and effectiveness of sulphadoxine-pyrimethamine intermittent preventive treatment in pregnancy for reducing malaria-associated morbidity in pregnant women in Malawi.
Malaria infection in pregnancy is associated with severe maternal anemia, placental parasitemia, low birth weight, and increased perinatal mortality. Intermittent preventive treatment in pregnancy (IPTp) with sulphadoxine-pyrimethamine (SP) is recommended by the World Health Organization (WHO) for reducing the risks associated with malaria in pregnancy. Traditionally, the level of SP resistance has been assessed by monitoring its in vivo efficacy for treatment of uncomplicated malaria in children under five years of age. However, parasite resistance to SP has compromised its efficacy in young children, and SP is no the longer a first-line recommended treatment for malaria in most African countries. Although SP currently appears to remain effective for IPTp in pregnant women probably because they have more immunity than young children, it is important to monitor SP effectiveness in this population. Characterizing SP resistance through in vivo and molecular methods in pregnant women may be useful to predict whether to continue a policy of IPTp with SP.
There will be three parts to this study. To determine therapeutic efficacy of SP IPTp in pregnant women, a prospective in vivo study will be done in women who present for antenatal care (ANC). Women will receive SP IPTp according to national guidelines and will be followed for 42 days for clearance of peripheral parasitemia. To determine birth outcomes of women given SP IPTp, a retrospective cohort study will be performed assessing outcomes of women at delivery. Information on prior receipt of SP IPTp, peripheral and placental parasitemia at delivery, placental histology, maternal anemia, and birth weight will be collected. To characterize baseline resistance of SP in pregnant women and in the general population, parasites will be collected from both participating women and attendees at outpatient clinics to measure SP resistance markers.
The results of this study will be used by the Malawi national control program to evaluate current policy of using SP for IPTp. This study will also contribute towards an international effort led by WHO to align priorities and methodologies in gathering data on the efficacy of SP in IPTp in the face of increasing SP resistance, thus providing data to inform IPTp policy at the global level.
Observational Model: Cohort
Malaria in Pregnancy
Machinga District Hospital
Centers for Disease Control and Prevention
Published on BioPortfolio: 2014-08-27T03:13:48-0400
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Vaccines made from antigens arising from any of the four strains of Plasmodium which cause malaria in humans, or from P. berghei which causes malaria in rodents.
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