A 9-year-old girl presents with bloody diarrhea following a neighborhood barbeque. Her mother said the hamburgers were undercooked. Ultimately, a diagnosis of O157 strain of E. coli is made. Where are the O antigens found? In
A) Capsule B) Lipopolysaccharide C) Lipoprotein D) Mesosome E) Peptidoglycan F) Teichoic acid