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MALARIA IN PREGNANT CAMEROONIAN WOMEN: THE EFFECT OF AGE AND GRAVIDITY ON SUBMICROSCOPIC AND MIXED-SPECIES INFECTIONS AND MULTIPLE PARASITE GENOTYPES

WALKER-ABBEY, ANNIE, DJOKAM, ROSINE R. T., ENO, ANNA, LEKE, ROSE F. G., TITANJI, VINCENT P. K., FOGAKO, JOSEPHINE, SAMA, GRACE, THUITA, LUCY H., BEARDSLEE, ELIZA, SNOUNOU, GEORGES, ZHOU, AINONG, TAYLOR, DIANE WALLACE·2005·The American Journal of Tropical Medicine and Hygiene

DOI 10.4269/ajtmh.2005.72.229

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Abstract

Polymerase chain reaction (PCR)–based methods were used to investigate malaria in pregnant women residing in Yaoundé, Cameroon. Microscopy and species-specific PCR-based diagnosis show that at delivery 82.4% of the women were infected with Plasmodium falciparum (27.5% blood-smear positive and 54.9% submicroscopic infections). The prevalence of P. malariae and P. ovale was 7.6% and 2.5%, respectively, with 9.4% infected with more than one species. Based on genotyping of the merozoite surface protein 1 (msp-1) and msp-2 alleles, the mean number of genetically different P. falciparum parasites in peripheral blood was 3.4 (range = 1–9) and 3.5 (range 1–8) in the placenta. Plasmodium falciparum detected by microscopy and PCR as well as mixed-species infections were significantly higher in women ≤ 20 years old and paucigravidae, but maternal anemia was associated only with microscopic detection of parasites. Neither submicroscopic infections nor number of parasite genotypes decreased significantly with age or gravidity. Thus, pregnancy-associated immunity helps reduce malaria to submicroscopic levels, but does not reduce the number of circulating parasite genotypes.

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Authors: WALKER-ABBEY, A., DJOKAM, R. R. T., ENO, A., LEKE, R. F. G., TITANJI, V. P. K., FOGAKO, J., SAMA, G., THUITA, L. H., BEARDSLEE, E., SNOUNOU, G., ZHOU, A., & TAYLOR, D. W.
Affiliations: Université de Yaoundé I (CM)
ORCID: LEKE, ROSE F. G.
TITANJI, VINCENT P. K.
SNOUNOU, GEORGES
TAYLOR, DIANE WALLACE
Venue: The American Journal of Tropical Medicine and Hygiene
Publisher: American Society of Tropical Medicine and Hygiene
Published: 2005-03
Volume: 72
Issue: 3
Pages: 229-235
ISSN: 0002-9637 (ISSN-L)
DOI: 10.4269/ajtmh.2005.72.229
OpenAlex: W2153783038
Cited by: 132
References: 23
Citations by year: 2026: 3 · 2025: 3 · 2024: 6 · 2023: 8 · 2022: 15 · 2021: 11 · 2020: 4 · 2019: 7 · 2018: 6 · 2017: 4 · 2016: 5 · 2015: 7 · 2014: 10 · 2013: 3 · 2012: 8
FWCI: 2.80
Type: journal article
Language: en
Open access: closed
Locations: American Journal of Tropical Medicine and Hygiene (publishedVersion)
PubMed (publishedVersion)
Funders: National Institute of Allergy and Infectious Diseases (U01 AI43888, UO1-AI-135839, U01AI043888)
Topics: Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
Life Sciences › Immunology and Microbiology › Parasitology › Bird parasitology and diseases
Health Sciences › Medicine › Genetics (clinical) › Hemoglobinopathies and Related Disorders
Keywords: malaria in pregnancy, Plasmodium falciparum, submicroscopic malaria infection, Plasmodium malariae, Plasmodium ovale, merozoite surface protein 1, merozoite surface protein 2, parasite genotypes, maternal age, gravidity, anemia in pregnancy, placental malaria, Yaoundé
MeSH terms: Adult, Age Factors, Anemia, Animals, Antimalarials, Cameroon, Female, Genotype, Humans, Malaria, Plasmodium, Plasmodium falciparum, Pregnancy, Pregnancy Complications, Parasitic, Polymerase Chain Reaction, Malaria, Falciparum

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MALARIA IN PREGNANT CAMEROONIAN WOMEN: THE EFFECT OF AGE AND GRAVIDITY ON SUBMICROSCOPIC AND MIXED-SPECIES INFECTIONS AND MULTIPLE PARASITE GENOTYPES

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