-Which of the following is not an example of a virulence factor?   a. the pathogen changes it spike proteins over a short period of time b. the pathogen is nosocomial c. the pathogen can lyse phagosomes d. Lipopolysaccharide (LPS)

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Q: Escherichia coli displays which antigens? a. capsular c. fl agellar b. somatic d. all of these

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