Integrated Food Chain Surveillance System for Salmonella spp. in Mexico1
Mussaret B. Zaidi* , Juan Jose Calva†, Maria Teresa Estrada-Garcia‡, Veronica Leon*, Gabriela Vazquez§, Gloria Figueroa§, Estela Lopez¶, Jesus Contreras#, Jason Abbott**, Shaohua Zhao**, Patrick McDermott**, and Linda Tollefson††
Author affiliations: *Hospital General O’Horan, Mérida, Mexico; †Instituto Nacional de Ciencias Medicas y Nutricion, Salvador Zubiran, Mexico City, Mexico; ‡Centro de Investigacion y Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico; §Secretaría de Salud del Estado de Michoacan, Morelia, Mexico; ¶Laboratorio Estatal de Salud Pública y Hospital Central, Servicios de Salud del Estado de San Luis Potosí, San Luis Potosi, Mexico; #Hospital Infantil del Estado de Sonora, Hermosillo, Mexico; **Food and Drug Administration, Laurel, Maryland, USA; ††Food and Drug Administration, Rockville, Maryland, USA;
Figure 2. Selected pulsed-field gel electrophoresis (PFGE) clusters that represent 102 strains of Salmonella Typhimurium and shared indistinguishable PFGE patterns among humans (H), chicken meat and intestine (C), pork meat and swine intestine (P), and beef meat and cattle intestine (B). Several clusters (C,D, E, and L) were present in more than one state. MI, Michoacan; SLP, San Luis Potosi; SO, Sonora; YU, Yucatan. An expanded version of this figure containing the complete set of PFGE patterns is available from http://www.cdc.gov/EID/content/14/3/429-G2.htm.
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