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I wish to disagree with the Article “The Teaching of Malaria Diagnosis” by A. J. Walker.

It is just as bad to insist on teaching only thick film method as it would be to teach only thin films. Both should be thoroughly taught. Thick films do increase positive findings and so must be taught; but one who relies on this method alone is like the man who would base pathologic diagnosis on gross appearances alone, neglecting microscopic details. The fact that once this was all anyone had is immaterial.

If one wishes to study the life history of the parasites and their real structure and differences, as well as determining if there are sufficient gametocytes to infect mosquitoes, well stained thin films are an essential. It will take on the average, three laboratory periods of three hours each to teach this. This conclusion is based on over twenty years of teaching.