Self-Reported diarrhea in a control group: A strong association with reporting of low-pressure events in tap

In a recently conducted case-control study of sporadic cryp-tosporidiosis, 6.6 % of subjects in the control group reported having had diarrhea in the 2 weeks before completion of the questionnaire. In an analysis of this control group, there was a very strong association between self-reported diarrhea and reported low water pressure at the faucet. Acute diarrhea is a common symptom in the developed world, especially among the youngest members of our society. Actual estimates of illness vary depending on the method used to ascertain illness rates, on the case definitions, and on the coun-try [1]. In the United States, with use of a retrospective study design, it was estimated that there are 140 episodes of diarrhea for every 100 person-years [2]. In the United Kingdom, ret-rospective studies estimate illness rates to be 55–95 episodes for every 100 person-years [3–5]. Prospective studies seem t