Carlos Daniel Roldán

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Shiga toxin–pro-ducing Escherichia coli (STEC) infection among children in Argentina. We conducted a prospective case–control study in 2 sites and enrolled 150 case-patients and 299 controls. The median age of case-patients was 1.8 years; 58% were girls. Serotype O157:H7 was the most commonly isolated STEC. Exposures associated with infection included(More)
LETTERS tory of casual contact between its citizens and the travelers and nonciti-zens who reside there. Hospitals have functioned as junctions for varied communities in spreading the SARS virus further. Because of SARS' likely place of origin , the initial " community " included Chinese persons who then kindled the chain of transmission to other(More)
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