Which of the following is a strict human pathogen?

• Shigella spp

• Salmonella spp

• Escherichia coli

• Yersinia enterocolitica

What type of antigens are O antigens associated with?

• Capsular

• Flagellar

• Lipopolysaccharides

• Peptidoglycan

Which strain of E. coli is associated with enterotoxin production?

• DAEC

• EPEC

• EIEC

• ETEC

What is the primary mode of transmission for non-typhoidal Salmonella?

• Waterborne transmission

• Direct contact

• Airborne particles

• Contaminated food

Which of the following is a characteristic of Shigella infections?

• Zoonotic transmission

• Limited to the GI tract

• Primarily affects adults

• Causes systemic infections

What is the natural reservoir for Yersinia enterocolitica?

• Birds

• Rodents

• Humans

• Fish

How many groups are E. coli strains that cause gastroenteritis subdivided into?

• 4

• 7

• 5

• 6

What is the most severe form of shigellosis caused by?

• Shigella boydii

• Shigella dysenteriae

• Shigella sonnei

• Shigella flexneri

Which antigen is associated with virulence in some Enterobacteriaceae?

• M antigen

• O antigen

• K antigen

• H antigen