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Travel and Tropical Medicine

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... Impact of resistance to anti-malarials Initially, at low levels of resistance and with a low prevalence of malaria, the impact of resistance to anti-malarials is insidious. The initial symptoms of the infection resolve and the patient appears to be better for some weeks. When symptoms recur, usuall ...
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Mass drug administration



The administration of drugs to whole populations irrespective of disease status is referred to as mass drug administration (MDA). This article describes the administration of antimalarial drugs to whole populations an intervention which has been used as a malaria-control measure for more than 70 years. Recent proposals to eliminate or even to eradicate malaria have led to a renewed interest in mass drug administrations in areas with very high malaria endemicity. Drugs have been administered either directly as a full therapeutic course of treatment or indirectly through the fortification of salt. Mass drug administrations were generally unsuccessful in interrupting transmission but, in some cases, had a marked effect on parasite prevalence and on the incidence of clinical malaria. MDAs are likely to encourage the spread of drug-resistant parasites and so have only a limited role in malaria control. They may have a part to play in the management of epidemics and in the control of malaria in areas with a very short transmission season. In order to reduce the risk of spreading drug resistance, MDAs should use more than one drug and, preferably include a drug, such as an artemisinin, which has an effect on gametocytes. MDAs have low acceptance in areas with low malaria endemicity.Another example of mass drug administration is mass deworming of children to remove helminth infections (intestinal worms).
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