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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 4

Antimicrobial drug resistance in Salmonella enterica serovar Typhimurium 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 = 87) 79.3 80.5 0.0 66.3 44.8 33.3 55.1 97.3 91.9 71.2 88.5
Asymptomatic children (n = 25) 36.0 36.0 0.0 25.0 4.0 4.0 12.0 73.9 60.0 24.0 44.0
Chicken‡ (n = 22) 100.0 86.4 0.0 77.3 18.2 18.1 27.2 100.0 90.9 54.5 90.9
Swine‡ (n = 127) 61.9 88.9 1.7 40.4 47.6 41.3 72.2 97.2 92.9 63.5 94.4
Cattle‡ (n = 53) 47.2 71.7 0.0 7.5 45.3 35.9 79.2 94.6 90.6 56.6 92.5

*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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