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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

Percentage of human, retail meat, and food-animal samples positive for Salmonella spp. detected by an integrated food chain system in Mexico, 2002–2005. Numbers to the right of bars indicate average values, and numbers in parentheses indicate the frequency of positive samples in the states with the lowest and highest prevalence, respectively. The number of specimens examined from each source (n) is shown next to each source heading.
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Figure 1: Percentage of human, retail meat, and food-animal samples positive for Salmonella spp. detected by an integrated food chain system in Mexico, 2002–2005. Numbers to the right of bars indicate average values, and numbers in parentheses indicate the frequency of positive samples in the states with the lowest and highest prevalence, respectively. The number of specimens examined from each source (n) is shown next to each source heading.

Mentions: Figure 1 shows the number of specimens sampled from each source and the percentage that were positive for Salmonella spp. The prevalence of Salmonella spp. was highest in swine intestines and pork meat (42.1% and 36.4%, respectively), followed by cattle intestines and beef (20.9% and 29.9%, respectively), and chicken intestines and chicken meat (16.9% and 21.3%, respectively). Salmonella was isolated from 12.3% of hospital-samples from children with cases of diarrhea and 5.3% of asymptomatic kindergarten children.


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)

Percentage of human, retail meat, and food-animal samples positive for Salmonella spp. detected by an integrated food chain system in Mexico, 2002–2005. Numbers to the right of bars indicate average values, and numbers in parentheses indicate the frequency of positive samples in the states with the lowest and highest prevalence, respectively. The number of specimens examined from each source (n) is shown next to each source heading.
© Copyright Policy
Related In: Results  -  Collection

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

Figure 1: Percentage of human, retail meat, and food-animal samples positive for Salmonella spp. detected by an integrated food chain system in Mexico, 2002–2005. Numbers to the right of bars indicate average values, and numbers in parentheses indicate the frequency of positive samples in the states with the lowest and highest prevalence, respectively. The number of specimens examined from each source (n) is shown next to each source heading.
Mentions: Figure 1 shows the number of specimens sampled from each source and the percentage that were positive for Salmonella spp. The prevalence of Salmonella spp. was highest in swine intestines and pork meat (42.1% and 36.4%, respectively), followed by cattle intestines and beef (20.9% and 29.9%, respectively), and chicken intestines and chicken meat (16.9% and 21.3%, respectively). Salmonella was isolated from 12.3% of hospital-samples from children with cases of diarrhea and 5.3% of asymptomatic kindergarten children.

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