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Integrated food chain surveillance system for Salmonella spp. in Mexico.

Zaidi MB, Calva JJ, Estrada-Garcia MT, Leon V, Vazquez G, Figueroa G, Lopez E, Contreras J, Abbott J, Zhao S, McDermott P, Tollefson L - Emerging Infect. Dis. (2008)

Bottom Line: Typhimurium (1.7%) from swine.Typhimurium isolates showed 14 clusters with 102 human, retail meat, and food-animal isolates with indistinguishable patterns.An IFCS is technically and economically feasible in developing countries and can effectively identify major public health priorities.

View Article: PubMed Central - PubMed

Affiliation: Hospital General O'Horan, Mérida, Mexico. mbzaidi@prodigy.net.mx

ABSTRACT
Few developing countries have foodborne pathogen surveillance systems, and none of these integrates data from humans, food, and animals. We describe the implementation of a 4-state, integrated food chain surveillance system (IFCS) for Salmonella spp. in Mexico. Significant findings were 1) high rates of meat contamination (21.3%-36.4%), 2) high rates of ceftriaxone-resistant S. Typhimurium in chicken, ill humans, and swine (77.3%, 66.3%, and 40.4% of S. Typhimurium T isolates, respectively), and 3) the emergence of ciprofloxacin resistance in S. Heidelberg (10.4%) and S. Typhimurium (1.7%) from swine. A strong association between Salmonella spp. contamination in beef and asymptomatic Salmonella spp. infection was only observed in the state with the lowest poverty level (Pearson r = 0.91, p<0.001). Pulsed-field gel electrophoresis analysis of 311 S. Typhimurium isolates showed 14 clusters with 102 human, retail meat, and food-animal isolates with indistinguishable patterns. An IFCS is technically and economically feasible in developing countries and can effectively identify major public health priorities.

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Related in: MedlinePlus

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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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.

Mentions: The network collected 314 S. Typhimurium isolates, of which 311 were available for PFGE (Figure 2). A total of 126 PFGE patterns were identified. Fourteen clusters (boxes A–N), comprising a total of 102 strains (37 human, 37 retail meat, and 28 food-animal isolates), were common to both humans and food animals. Three patterns (012, 101, 113) were common to humans, and all 3 food animals, and 1 pattern (113) was found in all 4 states. For each state, we found clusters of human isolates that were indistinguishable or closely related to those found in retail meat, food animals, or both.


Integrated food chain surveillance system for Salmonella spp. in Mexico.

Zaidi MB, Calva JJ, Estrada-Garcia MT, Leon V, Vazquez G, Figueroa G, Lopez E, Contreras J, Abbott J, Zhao S, McDermott P, Tollefson L - Emerging Infect. Dis. (2008)

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.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2570816&req=5

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.
Mentions: The network collected 314 S. Typhimurium isolates, of which 311 were available for PFGE (Figure 2). A total of 126 PFGE patterns were identified. Fourteen clusters (boxes A–N), comprising a total of 102 strains (37 human, 37 retail meat, and 28 food-animal isolates), were common to both humans and food animals. Three patterns (012, 101, 113) were common to humans, and all 3 food animals, and 1 pattern (113) was found in all 4 states. For each state, we found clusters of human isolates that were indistinguishable or closely related to those found in retail meat, food animals, or both.

Bottom Line: Typhimurium (1.7%) from swine.Typhimurium isolates showed 14 clusters with 102 human, retail meat, and food-animal isolates with indistinguishable patterns.An IFCS is technically and economically feasible in developing countries and can effectively identify major public health priorities.

View Article: PubMed Central - PubMed

Affiliation: Hospital General O'Horan, Mérida, Mexico. mbzaidi@prodigy.net.mx

ABSTRACT
Few developing countries have foodborne pathogen surveillance systems, and none of these integrates data from humans, food, and animals. We describe the implementation of a 4-state, integrated food chain surveillance system (IFCS) for Salmonella spp. in Mexico. Significant findings were 1) high rates of meat contamination (21.3%-36.4%), 2) high rates of ceftriaxone-resistant S. Typhimurium in chicken, ill humans, and swine (77.3%, 66.3%, and 40.4% of S. Typhimurium T isolates, respectively), and 3) the emergence of ciprofloxacin resistance in S. Heidelberg (10.4%) and S. Typhimurium (1.7%) from swine. A strong association between Salmonella spp. contamination in beef and asymptomatic Salmonella spp. infection was only observed in the state with the lowest poverty level (Pearson r = 0.91, p<0.001). Pulsed-field gel electrophoresis analysis of 311 S. Typhimurium isolates showed 14 clusters with 102 human, retail meat, and food-animal isolates with indistinguishable patterns. An IFCS is technically and economically feasible in developing countries and can effectively identify major public health priorities.

Show MeSH
Related in: MedlinePlus