Pfcrt 76T and pfmdr1 86Y allele frequency in Plasmodium falciparum isolates and use of self-medication in a rural area of Gabon
| Autor: | Denise Patricia Mawili-Mboumba, F. Maboko, Vincent Guiyedi, Maryvonne Kombila, J. M. Ndong Ngomo, M. K. Bouyou Akotet, J. R. Mourou Mbina |
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| Rok vydání: | 2014 |
| Předmět: |
Male
Rural Population Plasmodium falciparum Drug Resistance Protozoan Proteins Drug resistance Self Medication Antimalarials Gene Frequency Chloroquine parasitic diseases Genotype medicine Humans Gabon Allele Malaria Falciparum Child Allele frequency biology Public Health Environmental and Occupational Health Wild type Amodiaquine Infant Membrane Transport Proteins General Medicine biology.organism_classification Virology Infectious Diseases Child Preschool Parasitology Female Restriction fragment length polymorphism Multidrug Resistance-Associated Proteins medicine.drug |
| Zdroj: | Transactions of the Royal Society of Tropical Medicine and Hygiene. 108(11) |
| ISSN: | 1878-3503 |
| Popis: | Background Studies showed that chloroquine resistance may revert to sensitivity after its withdrawal mainly detected by a significant decrease of Plasmodium falciparum pfcrt 76T and pfmdr1 86Y alleles. Besides, self-medication is considered as a key factor of antimalarial drug resistance expansion. Thus, pfcrt 76T and pfmdr1 86Y allele frequency and its relationship with antimalarial drug self-medication was analyzed in P. falciparum isolates collected in Gabon. Methods Samples were collected from febrile children screened for P. falciparum infection in 2005 and 2008 at the regional hospital of Oyem. Self-use of antimalarial drugs before the day of consultation was recorded. Polymorphic codons 76 and 86 of pfcrt and pfmdr1 genes were analyzed by PCR-RFLP. Results The frequency of pfcrt 76T mutant allele was greater than 70.0% in 2005 and 2008. Wild type isolates were 1.7-fold more prevalent in 2008. The prevalence of pfmdr1 86Y mutant allele was comparable between 2005 and 2008 (p=0.1); the proportion of wild type allele reached 20.5% in 2008. The frequency of wild type allele pfcrt K76 or pfmdr1 N86 was higher among patients without anti-malarial drug self-medication compared to those who used it. Conclusions An increase of the frequency of P. falciparum wild type allele pfcrt 76K and pfmdr1 86N was observed within a short period after chloroquine withdrawal. The proportion of mutant genotypes is still high, mainly among patients using self-medication with antimalarial drugs. |
| Databáze: | OpenAIRE |
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