Isolation of Shiga toxin-producing Escherichia coli (STEC) serotype 091: H21 from a child with diarrhea in Porto Alegre city, RS, Brazil

We describe the isolation of one strain of Shiga toxin-producing Escherichia coli 091: H21 from a child with diarrhea in the city of Porto Alegre, RS, Brazil. Considering the pathogenic potential of STEC, these organisms should be looked for more carefully among our population.