The Pediatric infectious disease journal · 2009
Outbreak of Salmonella Wandsworth and Typhimurium infections in infants and toddlers traced to a commercial vegetable-coated snack food.
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Sotir Mark J, Ewald Gwen, Kimura Akiko C, Higa Jeffrey I, Sheth Anandi, Troppy Scott, Meyer Stephanie, Hoekstra R Michael, Austin Jana, Archer John, Spayne Mary, Daly Elizabeth R, Griffin Patricia M, Salmonella Wandsworth Outbreak Investigation Team
Аннотация
OBJECTIVE: Human outbreaks of Salmonella infection have been attributed to a variety of food vehicles. Processed snack foods are increasingly consumed by children. In May 2007, state and local health departments and the Centers for Disease Control and Prevention investigated human infections from Salmonella Wandsworth, an extremely rare serotype.
MATERIALS AND METHODS: Serotyping and pulsed-field gel electrophoresis were used to identify outbreak-associated illnesses. Food history questionnaires and open-ended interviews were used to generate exposure hypotheses. A nationwide case-control study was conducted to epidemiologically implicate a source. Public health laboratories cultured implicated product from patient homes and retail stores.
RESULTS: Sixty-nine patients from 23 states were identified; 93% were aged 10 months to 3 years. Eighty-one percent of child patients had bloody diarrhea; 6 were hospitalized. No deaths were reported. The case-control study strongly associated illness with a commercial puffed vegetable-coated ready-to-eat snack food (mOR = 23.3, P = 0.0001), leading to a nationwide recall. Parents of 92% of interviewed case-children reported that children consumed the food during the week before their illness began; 43% reported daily consumption. Salmonella Wandsworth, 3 additional Salmonella serotypes and Chronobacter (formerly Enterobacter) sakazaki were all cultured from this product, leading to the identification of 18 human outbreak-related Salmonella Typhimurium illnesses.
CONCLUSIONS: This report documents a nationwide outbreak associated with a commercial processed ready-to-eat snack food. Cases occurred primarily in infants and toddlers, many of whom frequently consumed the food. Measures are needed to ensure that ingredients added to ready-to-eat foods after the final lethal processing step are free of pathogens.
MATERIALS AND METHODS: Serotyping and pulsed-field gel electrophoresis were used to identify outbreak-associated illnesses. Food history questionnaires and open-ended interviews were used to generate exposure hypotheses. A nationwide case-control study was conducted to epidemiologically implicate a source. Public health laboratories cultured implicated product from patient homes and retail stores.
RESULTS: Sixty-nine patients from 23 states were identified; 93% were aged 10 months to 3 years. Eighty-one percent of child patients had bloody diarrhea; 6 were hospitalized. No deaths were reported. The case-control study strongly associated illness with a commercial puffed vegetable-coated ready-to-eat snack food (mOR = 23.3, P = 0.0001), leading to a nationwide recall. Parents of 92% of interviewed case-children reported that children consumed the food during the week before their illness began; 43% reported daily consumption. Salmonella Wandsworth, 3 additional Salmonella serotypes and Chronobacter (formerly Enterobacter) sakazaki were all cultured from this product, leading to the identification of 18 human outbreak-related Salmonella Typhimurium illnesses.
CONCLUSIONS: This report documents a nationwide outbreak associated with a commercial processed ready-to-eat snack food. Cases occurred primarily in infants and toddlers, many of whom frequently consumed the food. Measures are needed to ensure that ingredients added to ready-to-eat foods after the final lethal processing step are free of pathogens.