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Volume 11, Number 8—August 2005

Dispatch

Drug-resistant Diarrheogenic Escherichia coli, Mexico

Teresa Estrada-García*Comments to Author , Jorge F. Cerna*†, Leova Paheco-Gil‡§, Raúl F. Velázquez†, Theresa J. Ochoa¶, Javier Torres†, and Herbert L. DuPont¶#**
Author affiliations: *Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Distrito Federal, Mexico; †Instituto Mexicano del Seguro Social, Mexico City, Distrito Federal, Mexico; ‡Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, Mexico; §Hospital del Niño “Dr. Rodolfo Nieto Padrón,” Villahermosa, Tabasco, Mexico; ¶University of Texas Health Science Center at Houston, Houston, Texas, USA; #Baylor Collage of Medicine, Houston, Texas, USA; **St. Luke's Episcopal Hospital, Houston, Texas, USA

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Table 1

Diarrheogenic Escherichia coli (DE) isolated from patients with diarrhea

DE group* No. patients by DE group (%) No. strains† by DE group Strain genotypes and no. positive strains by gene(s)
ETEC 17 (27) 50 lt = 29, st = 17, st-lt = 4
EAEC 16 (26) 56 aap-aggR-aatA = 56
aEPEC 13 (21) 31 eaeA = 31
STEC 11 (18) 22 stx2 = 9, stx1-eaeA = 9, stx1 = 3, stx1-eaeA-hlyA = 1
EPEC 3 (5) 7 eaeA-bfp = 7
EIEC
2 (3)
4
ial = 4
Total 62 170

*ETEC, enterotoxigenic E. coli; EAEC, enteroaggregative E. coli; aEPEC, atypical enteropathogenic E. coli; STEC, Shiga toxin–producing E. coli; EPEC, enteropathogenic E. coli; EIEC, enteroinvasive E. coli.
†All diarrheogenic E. coli strains isolated from patients with diarrhea; in general, 5 E. coli strains were isolated from each patient.

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