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Volume 14, Number 3—March 2008

Research

Integrated Food Chain Surveillance System for Salmonella spp. in Mexico1

Mussaret B. Zaidi*Comments to Author , 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;

Main Article

Table 3

Antimicrobial drug resistance in Salmonella isolates from humans, retail meat, and food animals in Mexico, 2002–2005*

Source % Resistant†
AMP CHL CIP CRO GEN KAN NAL STR SU SXT TET
Ill humans (n = 392) 25.5 23.4 0.0 14.5 11.7 11.2 24.6 61.1 49.7 24.3 41.2
Asymptomatic children (n = 373) 7.8 8.4 0.0 1.4 2.2 0.5 8.6 45.9 35.4 8.0 26.1
Chicken‡ (n = 546) 7.7 7.4 0.0 3.6 2.6 1.8 30.6 58.9 38.9 11.5 36.8
Swine‡ (n = 1,237) 18.3 22.9 0.6 4.2 8.4 9.0 26.0 73.1 62.1 24.2 55.3
Cattle‡ (n = 767) 11.9 14.1 0.0 1.2 6.6 7.2 20.8 71.6 53.1 19.2 48.8

*AMP, ampicillin; CHL, chloramphenicol; CIP, ciprofloxacin; CRO, ceftriaxone; GEN, gentamicin; KAN, kanamycin; NAL, nalidixic acid; STR, streptomycin; SU, sulfisoxazole; SXT, trimethoprim-sulfamethoxazole; TET, tetracycline.
†Includes resistant and intermediate.
‡Includes isolates from food-animal intestines and the corresponding retail meat.

Main Article

1Presented in part at the International Association for Food Protection 93rd Annual Meeting, August 13–16, 2006, Calgary, Alberta, Canada.

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