Thus, for example, in tap water, river, or well water, salmonellae of enteric fever can live from two days to three months, shigella — from 5-9 days, and leptospira — from seven to 150 days.

Section of Digestive Diseases and Nutrition, University of Illinois at Chicago and Chicago Veterans Administration Medical Center (West Side Division), Chicago, IL, USA Correspondence to: Dr G Hecht, ...