Abstract
The miniature anion-exchange/centrifugation (AEC) method, originally developed for the detection of submicroscopic trypanosomaemias in laboratory rodents, has been adapted for the diagnosis of trypanosomiasis in man in the field using blood samples obtained by finger-prick. It has been tested in a survey in The Gambia. The method is shown to be highly sensitive and to fulfil the first essential criteria for exploitation in the field, namely, that it can be operated in the open air under tropical conditions, and that an adequate number of subjects can be examined in a normal working day at an acceptable cost. The method also offers two advantages over the other highly sensitive method applicable to small blood samples, the microhaematocrit buffy-coat microscopy (MBCM) method, namely, that it minimizes the requirements for highly critical microscopy and provides, in the same operation, samples of diluted plasma which can be used for serological study.
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