A Swimming-Associated Outbreak of Hemorrhagic Colitis Caused by Escherichia coli O157:H7 and Shigella Sonnei

摘要: Background In the summer of 1991, simultaneous outbreaks bloody diarrhea and hemolytic-uremic syndrome caused by Escherichia coli O157:H7 Shigella sonnei were traced to a lakeside park near Portland, Oregon. Methods We identified cases primarily from routine surveillance reports. case-control studies, activities persons with park-associated E. or S. infections compared independently those three sets controls. also evaluated environmental conditions at subtyped bacterial isolates. Results 21 (all them children; median age, six years) 38 (most children). These 59 people had visited over 24-day period. Their illnesses not associated food beverage consumption. All case patients reported swimming, however, in studies swimming was strongly associated...