نتایج جستجو برای: pfcrt
تعداد نتایج: 384 فیلتر نتایج به سال:
INTRODUCTION There are growing concerns about the emergence of resistance to artemisinin-based combination therapies (ACTs). Since the widespread adoption of ACTs, there has been a decrease in the systematic surveillance of antimalarial drug resistance in many malaria-endemic countries. The aim of this work was to test whether data on travellers returning from Africa with malaria could serve as...
OBJECTIVE To assess the efficacy of antimalarial treatment and molecular markers of Plasmodium falciparum resistance in the Chittagong Hill Tracts of Bangladesh. METHODS A total of 203 patients infected with P. falciparum were treated with quinine 3 days plus sulphadoxine/pyrimethamine (SP) combination therapy, and followed up during a 4-week period. Blood samples collected before treatment w...
background: point mutations in the genes, pfcrt and pfdhfr , have been identified elsewhere as strongly associated with resistance to chloroquine (cq) and pyrimethamine, respectively. methods: using a restriction digestion method, we report the frequency of two important mutations, t76 and asn108, responsible for conferring resistance to chloroquine and pyrimethamine, respectively, in patie...
BACKGROUND The predominance of chloroquine-susceptible falciparum malaria in Malawi more than a decade after chloroquine's withdrawal permits contemplation of re-introducing chloroquine for targeted uses. We aimed to compare the ability of different partner drugs to preserve chloroquine efficacy and prevent the re-emergence of resistance. METHODOLOGY/PRINCIPAL FINDINGS Children with uncomplic...
BACKGROUND Seasonal malaria chemoprevention (SMC) with sulphadoxine-pyrimethamine (SP) plus amodiaquine (AQ) is being scaled up in Sahelian countries of West Africa. However, the potential development of Plasmodium falciparum resistance to the respective component drugs is a major concern. METHODS Two cross-sectional surveys were conducted before (August 2012) and after (June 2014) a pilot im...
Despite the clear public health benefit of insecticide-treated bednets (ITNs), the impact of malaria transmission-reduction by vector control on the spread of drug resistance is not well understood. In the present study, the effect of sustained transmission reduction by ITNs on the prevalence of Plasmodium falciparum gene mutations associated with resistance to the antimalarial drugs sulfadoxin...
As a result of widespread resistance to chloroquine (CQ) and sulphadoxine-pyrimethamine (SP), artemisinin-based combination therapy (ACT) has been recommended as a first-line anti-malarial regimen in Côte d'Ivoire since 2005. A thorough understanding of the molecular bases of P. falciparum resistance to existing drugs is therefore needed. The aims of this study were to analyze the in vitro sens...
Malaria control is hindered by the evolution and spread of resistance to antimalarials, necessitating multiple changes to drug policies over time. A comprehensive antimalarial drug resistance surveillance program is vital for detecting the potential emergence of resistance to antimalarials, including current artemisinin-based combination therapies. An antimalarial drug resistance surveillance s...
Malaria is caused by an intracellular protozoan parasite of the genus Plasmodium. The use of chemotherapy, the foremost tool available for the control of the disease, has been challenged in the last decades by the development and spread of drug resistance among malaria parasites. A clear understanding behind the mechanisms of parasite resistance is required for the improvement of treatment effi...
Seasonal malaria chemoprevention (SMC), with regular use of amodiaquine plus sulfadoxine-pyrimethamine (AQ/SP) during the transmission season, is now a standard malaria control measure in the Sahel subregion of Africa. Another strategy under study is SMC with dihydroartemisinin plus piperaquine (DP). Plasmodium falciparum single nucleotide polymorphisms (SNPs) in P. falciparum crt (pfcrt), pfmd...
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