ArticleMalaria journal2015
Identification of large variation in pfcrt, pfmdr-1 and pfubp-1 markers in Plasmodium falciparum isolates from Ethiopia and Tanzania.
Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed.
- In vivo efficacy of chloroquine plus primaquine combination therapy against uncomplicated Plasmodium vivax malaria in Limu Kossa District, Jimma Zone, Southwest Ethiopia.Malaria journal · 2024Trial
- The return of chloroquine-susceptible Plasmodium falciparum malaria in Zambia.Malaria journal · 2016Trial
- Molecular surveillance of antimalarial drug resistance markers in the pfcrt, pfmdr1 and pfmrp1 genes of Plasmodium falciparum isolates from southeastern Iran.Malaria journal · 2026Article
- Rising of antimalarial drug resistance Pfmdr1 N86Y and Pfcrt K76T gene in Ethiopia: a systematic review and meta-analysis.Journal, genetic engineering & biotechnology · 2026Article
- A review on molecular markers ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2025Review
- A NovelmedRxiv : the preprint server for health sciences · 2025Article
- Clinical isolates of uncomplicated falciparum malaria from high and low malaria transmission areas show distinct pfcrt and pfmdr1 polymorphisms in western Ethiopia.Malaria journal · 2023Article
- High prevalence of Pfcrt 76T and Pfmdr1 N86 genotypes in malaria infected patients attending health facilities in East Shewa zone, Oromia Regional State, Ethiopia.Malaria journal · 2022Article
- High Proportion of Genome-Wide Homology and Increased PretreatmentAntimicrobial agents and chemotherapy · 2021Article
- Molecular surveillance of anti-malarial resistance pfcrt, pfmdr1, and pfk13 polymorphisms in African Plasmodium falciparum imported parasites to Wuhan, China.Malaria journal · 2021Article
- Molecular surveillance of Pfcrt and k13 propeller polymorphisms of imported Plasmodium falciparum cases to Zhejiang Province, China between 2016 and 2018.Malaria journal · 2020Article
- Pooled Deep Sequencing of Drug Resistance Loci fromThe American journal of tropical medicine and hygiene · 2019Article
- Prevalence of Plasmodium falciparum delayed clearance associated polymorphisms in adaptor protein complex 2 mu subunit (pfap2mu) and ubiquitin specific protease 1 (pfubp1) genes in Ghanaian isolates.Parasites & vectors · 2018Article
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11 authors.
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Abstract
backgroundPlasmodium falciparum resistance to anti-malarials is a major drawback in effective malaria control and elimination globally. Artemisinin-combination therapy (ACT) is currently the key first-line treatment for uncomplicated falciparum malaria. Plasmodium falciparum genetic signatures at pfmdr-1, pfcrt, and pfubp-1 loci are known to modulate in vivo and in vitro parasite response to ACT. The objective of this study was to assess the distribution of these resistance gene markers in isolates collected from different malaria transmission intensity in Ethiopia and Tanzania.
methodsPlasmodium falciparum clinical isolates were collected from different regions of Ethiopia and Tanzania. Genetic polymorphisms in the genes pfcrt, pfmdr-1 and pfubp-1 were analysed by PCR and sequencing. Frequencies of the different alleles in the three genes were compared within and between regions, and between the two countries.
resultsThe majority of the isolates from Ethiopia were mutant for the pfcrt 76 and wild-type for pfmdr-1 86. In contrast, the majority of the Tanzanian samples were wild-type for both pfcrt and pfmdr-1 loci. Analysis of a variable linker region in pfmdr-1 showed substantial variation in isolates from Tanzania as compared to Ethiopian isolates that had minimal variation. Direct sequencing of the pfubp-1 region showed that 92.8% (26/28) of the Ethiopian isolates had identical genome sequence with the wild type reference P. falciparum strain 3D7. Of 42 isolates from Tanzania, only 13 (30.9%) had identical genome sequences with 3D7. In the Tanzanian samples, 10 variant haplotypes were identified.
conclusionThe majority of Ethiopian isolates carried the main marker for chloroquine (CQ) resistance, while the majority of the samples from Tanzania carried markers for CQ susceptibility. Polymorphic genes showed substantially more variation in Tanzanian isolates. The low variability in the polymorphic region of pfmdr-1 in Ethiopia may be a consequence of low transmission intensity as compared to high transmission intensity and large variations in Tanzania.
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