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Available data regarding the distribution, prevalence and severity of various diseases
are based on the performance and operational characteristics of the diagnostic techniques
applied; this is a fact that is particularly apparent in the study of helminth infections.
An important lesson learnt from the efforts to rein in dracunculiasis, lymphatic filariasis
and schistosomiasis is that the diagnostic approach needs to be changed as further
progress is made towards control and ultimate elimination of the disease. This insight
prompted the opinion piece presented here, which highlights diagnostic dilemmas in
helminthology related to the stage of control achieved and sets out some research