Cryptosporidiosis and the Healthy Host

Abstract
Acute diarrhea is rivaled in importance only by respiratory infection as a cause of morbidity on a worldwide scale. A key to preventing or controlling enteric infection is identifying the responsible agents. With the discoveries of enterotoxigenic Escherichia coli and rotavirus as important causes of acute diarrhea in the early 1970s came the hope that the cause of most cases of diarrhea could be defined. Yet, studies carried out in a variety of regions led to the identification of an agent in only 60 per cent of cases.In this issue of the Journal, Wolfson et al.1 describe a . . .