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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 2

Salmonella serovars in ill humans and their relative frequency in asymptomatic children and food animals, Mexico, 2002–2005

Serovar % for each serovar relative to the total no. of Salmonella serovars
Ill humans*
(n = 392) Asymptomatic
children (n = 373) Chicken†
(n = 546) Swine†
(n = 1237) Cattle†
(n = 767)
Typhimurium 22.2 6.7 4.6 10.2 6.8
Enteritidis 14.5 3.2 11.9 0.1 0.1
Agona 6.6 8.3 9.5 9.3 7.3
Muenchen 5.1 3.5 0.6 1.9 2.5
Oranienburg 4.1 4.3 0.9 0.3 0.3
Anatum 3.8 8.0 4.8 13.0 17.7
Newport 3.8 5.4 0.0 0.7 2.6
Meleagridis 3.1 6.4 5.3 11.6 13.0
Other 36.8 54.2 62.4 52.9 49.7

*Ill humans include 366 isolates from enteric infections and 26 isolates from invasive infections.
†Data for food animal intestine and the corresponding retail meat have been combined because serovars were very similar.

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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