2/16/2016 Introduction Shigellosis on a cruise ship 1989 Shigellosis is caused by the consumption 14%of the passengers and 3%of crew members of contaminated food or water reported gastrointestinal symptoms multiple-antibiotic resistant Shigella flexneri2a Shigellosis is disseminated via was isolated contaminated human feces Vehicle of the outbreak-German potato salad contaminated by a food handler Two large outbreaks have occurred in 1994 the past two decades 37%of the passengers and 4%of the crew reported having diarrhea and one death occurred. Shigella flexneri2a was isolated from patients Vehicle was spring onions 1990:Operation Desert Shield 2000:Five-layer bean dip 214 soldiers had diarrheal diseases Shigella sonneiwas isolated from 30 patients Shigella sonneiwas isolated from 113 Pathogen was isolated from the cheese layer Vehicle of the outbreak-fresh lettuce 2001:Tomatoes 1991:Moose soup in Alaska ·88 0 people involved 25 local residents contracted shigellosis from homemade mouse soup Overripe and bruised tomatoes from a single distributor One feature of shigellosis is that the Shigella sonnei was isolated contamination usually occurs through an 1994:Contaminated produce as a source of multiple infected food handler at small or large outbreaks of shigellosis gatherings instead of at the processing plant Lettuce and green onions were the vehicles 2/16/2016 3 • Shigellosis is caused by the consumption of contaminated food or water Introduction • Shigellosis is disseminated via contaminated human feces • Two large outbreaks have occurred in th p st t d c d s th e p ast two d e c a d e s Shigellosis on a cruise ship 1989 • 14% of the passengers and 3% of crew members reported gastrointestinal symptoms • m ltipl multiple-antibi ti sist nt ntibiotic resist ant Shi ll gea fl xn i flexneri 2 a was isolated • Vehicle of the outbreak – German potato salad contaminated by a food handler 1994 • 37% f h d 4% f h % of the passengers and 4% of the crew reported having diarrhea and one death occurred. • Shigella flexneri 2a was isolated from patients • Vehicle was spring onions 1990: Operation Desert Shield • 214 soldiers had diarrheal diseases • Shigella sonnei was isolated from 113 • Vehicle of the outbreak – fresh lettuce 1991: Moose soup in Alaska • 25 local residents contracted shigellosis from homemade mouse soup • Food preparer had gastroenteritis when making the food • Shigella sonnei was isolated 1994: Contaminated produce as a source of multiple outbreaks of shigellosis • Lettuce and green onions were the vehicles 2000: Five-layer bean dip • Shigella sonnei was isolated from 30 patients • Pathogen was isolated from the cheese layer 2001: Tomatoes • 880 people involved • Overripe and bruised tomatoes from a single distributor One feature of shi gellosis is that the contamination usually occurs through an infected food handler at small or large gatherings instead of at the processing plant