2/16/2016 01 Foods or food han- Outbreak dling practices implicated or the riskacqu Fresh spinach outbreaks Summer 2006 nderkd udbeef 206 people in 25 states 4量n量中中 became infected with E.coli0157:H7 after 融高 t行cured s0hT eating fresh spinach Lettuce ·3 people died Pruc rmmd Wild pigs captured in the area where the spinach was grown tested positive for the E.coliO157:H7 Ras幼spo,af6spo strain associated with the bagged spinach. FDA emphasized the need for good agricultural ate practices. Categories of Escherichia coli Escherichia coli Diarrheagenic E.colis categorized into groups based on All categories of E.colimay be shed in the virulence factors feces of infected humans. pathogenicity -spread to other humans clinical syndromes -spread to animals -distinct O:H serotypes -spread to the environment E.coli is differentiated by three major surface antigens >O-antigens Lipopolysaccharide >H-antigens Flagella >K-antigens Capsule 22/16/2016 2 Outbreak Fresh spinach Summer 2006 • 206 people in 25 states became infected with E. coli O157:H7 after eating fresh spinach • 3 p p eo le died • Wild pigs captured in the area where the spinach was grown tested positive for the E. coli O157:H7 strain associated with the bagged spinach. • FDA emphasized the need for good agricultural practices. Categories of Escherichia coli • Diarrheagenic E. coli is categorized into groups based on - vil fts irulence factors - pathogenicity - clinical syndromes - distinct O:H serotypes • E. coli is differentiated by j three major surface antigens  O-antigens Lipopolysaccharide  H-antigens Flagella  K-antigens Capsule Escherichia coli • All categories of E. coli may be shed in the feces of infected humans. - spread to other humans - spread to animals - spread to the environment