Washington: Malaria infections among infants can be reduced by up to 30 per cent when antimalarial drugs are given intermittently over a 12-month period, a new study has revealed.A three-year clinical trial in Papua New Guinea showed the drug regime was effective against both Plasmodium falciparum and Plasmodium vivax malaria, the first time antimalarial drugs have been shown to prevent infections by both species of malaria.The treatment regime, called intermittent preventive treatment (IPT), protected the infants against malaria for at least six weeks after the end of treatment, showing that it had an ongoing protective effect and did not hinder the development of natural immunity.Lead author Professor Ivo Mueller from the Walter and Eliza Hall Institute’s Infection and Immunity division, said that the findings could lead to trials of IPT in other regions, including South-East Asia and South America, where malaria, particularly P.vivax, is a major health problem.IPT has been used for number of years in sub-Saharan Africa, where more than 80 per cent of all deaths from malaria are in children under the age of five.“Plasmodium vivax is the main cause of clinical malaria in infants outside of Africa,” Professor Mueller said.“What this study has shown is that IPT can be useful in regions other than sub-Saharan Africa, that it can be an effective tool against P.vivax, and reaffirms that we need to effectively tailor preventive drugs to different malaria species in different regions.”IPT uses sporadic, short courses of combined antimalarial drugs to provide protection against malaria infection.“IPT is a cheap and easy way to decrease the burden of malaria in those most susceptible to clinical illness, such as young infants and pregnant women,” Professor Mueller said.As part of the clinical trial, infants aged three to 15 months were treated with a long-lasting antimalarial drug combination at three, six, nine and 12 months.
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