Polymorphisms in Malaria Parasites from Ghana
Author Information
Author(s): Kwansa-Bentum Bethel, Ayi Irene, Suzuki Takashi, Otchere Joseph, Kumagai Takashi, Anyan William K, Osei Joseph HN, Asahi Hiroko, Ofori Michael F, Akao Nobuaki, Wilson Michael D, Boakye Daniel A, Ohta Nobuo
Primary Institution: Noguchi Memorial Institute for Medical Research, University of Ghana
Hypothesis
Are there polymorphisms in the pfATPase6 and other genes in Plasmodium falciparum isolates from Ghana, and how do these relate to drug sensitivity?
Conclusion
Ghanaian Plasmodium falciparum isolates showed no improvement in susceptibility to chloroquine but were sensitive to artesunate, with significant genetic polymorphisms observed.
Supporting Evidence
- All tested parasite isolates were sensitive to artesunate.
- 51.6% of isolates were resistant to chloroquine.
- D639G mutation was found in about half of the isolates.
- No L263E and S769N mutations were observed in the pfATPase6 gene.
Takeaway
Scientists studied malaria parasites in Ghana to see if they had changes in their genes that might affect how well medicines work. They found that while the parasites were still sensitive to one medicine, many were resistant to another.
Methodology
The study involved DNA sequencing of blood samples and in vitro drug sensitivity tests using a modified WHO micro-test.
Limitations
The study only assessed polymorphisms after five years of drug pressure, which may not reflect earlier genetic diversity.
Participant Demographics
Participants were individuals diagnosed with uncomplicated malaria from southern Ghana.
Statistical Information
P-Value
0.001
Confidence Interval
95% CI, 0.38-1.08
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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