Emerging Infectious Disease ISSN: 1080-6059

Single Multiplex Polymerase Chain Reaction To Detect Diverse Loci Associated with Diarrheagenic Escherichia coli

Catalina López-Saucedo*, Jorge F. Cerna*, Nicolas Villegas-Sepulveda*, Rocío Thompson*, F. Raul Velazquez†, Javier Torres†, Phillip I. Tarr‡§, and Teresa Estrada-García*

Author affiliations: *Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México D.F., México; †Hospital de Pediatría, México D.F., México; ‡Children’s Hospital and Regional Medical Center, Seattle, Washington, USA; §University of Washington School of Medicine, Seattle, Washington, USA

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Figure

Polymerase chain reaction (PCR) products of each locus. Lane 1: sizes of the seven PCR products of each locus in base pairs, obtained when using a DNA mix of the four reference strains and the primers mix. PCR products obtained by using DNA of enterotoxigenic Escherichia coli, Shiga-toxin–producing E. coli, enteropathogenic E. coli, and enteroinvasive E. coli (lanes 2–5, respectively). Lane 6–11: PCR products obtained when using DNA of patients’ isolates and the primers mix. Lanes 12–15: PCR pro

Figure. Polymerase chain reaction (PCR) products of each locus. Lane 1: sizes of the seven PCR products of each locus in base pairs, obtained when using a DNA mix of the four reference strains and the primers mix. PCR products obtained by using DNA of enterotoxigenic Escherichia coli, Shiga-toxin–producing E. coli, enteropathogenic E. coli, and enteroinvasive E. coli (lanes 2–5, respectively). Lane 6–11: PCR products obtained when using DNA of patients’ isolates and the primers mix. Lanes 12–15: PCR products obtained when using DNA of food isolates and the primers mix. Lane 16: 1 kb molecular weight marker in base pairs.

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