The set of six review articles Neurological aspects of tropical disease published in this and subsequent issues of the Journal is an attempt to highlight some of the important neurological diseases in the tropics. We make no apologies for choosing six infectious diseases, as we think that such diseases still represent the major burden of disease in the developing world. We cannot hope to provide a comprehensive review of the subject and the selection of what to include may not be everyone's choice. All the authors are currently (or were until very recently) involved in clinical practice or in research in the conditions that they review. In …