Some current problems in the sero-immunology of trypanosomiasis in relation to the epidemiology and control of the disease

The author draws attention to the need for accurate epidemiological information so that control programmes may be properly orientated and he emphasizes that we are still at a loss in this respect in the case of trypanosomiasis, as we still lack methods to recognize, among the assemblage of natural trypanosome populations with identical morphology, those populations that have the biological capabilities to produce disease in man and his domestic stock.