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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 2

Diarrheogenic Escherichia coli resistance patterns*†

No. patients Tet, n (%) Amp, n (%) TMP-SMX, n (%) Chlor, n (%) MDR, n (%)
ETEC (n = 17) 16 (94) 15 (88) 12 (71) 2 (12) 11 (65)
EAEC (n = 16) 15 (94) 13 (81) 14 (88) 3 (19) 11 (69)
aEPEC (n = 13) 6 (46) 5 (38) 5 (38) 2 (15) 5 (38)
STEC (n = 11) 9 (81) 8 (72) 7 (63) 4 (36) 7 (63)
EPEC (n = 3) 3 (100) 3 (100) 2 (67) 0 2 (67)
EIEC (n = 2) 1 (50) 1 (50) 0 1 (50) 1 (50)
Total (n = 62) 51 (82) 45 (73) 40 (65) 12 (19) 36 (58)

*All isolates were susceptible to ciprofloxacin and cefotaxime. One STEC (9% of STEC or 2% of all isolates) was resistant to gentamicin; all other isolates were susceptible.
†Tet, tetracycline; Amp, ampicillin; TMP-SMX, trimethoprim-sulfamethoxazole; Chlor, chloramphenicol; MDR, multidrug resistant; 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.

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