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Attention is drawn to our relative lack of knowledge about the mechanisms of action of PZQ at the molecular level, the need for more work to be done on schistosome isolates that have been collected recently from endemic areas rather than those maintained in laboratory conditions for long periods, and our reliance for experimental work mainly on<jats:italic>Schistosoma mansoni<\/jats:italic>, little work having been done on<jats:italic>S. haematobium<\/jats:italic>. There is no evidence that resistance to PZQ has been induced in African schistosomes as a result of its large-scale use on that continent to date, but there is also no assurance that PZQ and\/or schistosomes are in any way unique and that resistant organisms will not be selected as a result of widespread drug usage. The failure of PZQ to produce complete cures in populations given a routine treatment should therefore solicit considerable concern. With few alternatives to PZQ currently available and\/or on the horizon, methods to monitor drug-susceptibility in African schistosomes need to be devised and used to help ensure that this drug remains effective for as long a time as possible.<\/jats:p>","DOI":"10.1017\/s0031182009000493","type":"journal-article","created":{"date-parts":[[2009,3,13]],"date-time":"2009-03-13T11:27:02Z","timestamp":1236943622000},"page":"1825-1835","source":"Crossref","is-referenced-by-count":178,"title":["Praziquantel: its use in control of schistosomiasis in sub-Saharan Africa and current research needs"],"prefix":"10.1017","volume":"136","author":[{"given":"M. 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