In the laboratory diagnosis of the enteric pathogens Salmonella and Shigella, the screening procedure includes testing their inability to
A. ferment glucose
B. ferment lactose
C. ferment sucrose
D. produce oxidase
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Shigellosis is common in travelers to developing countries. Infection is commonly acquired through the
A. skin
B. gastrointestinal tract
C. respiratory tract
D. genital tract
The H antigens of Salmonella are known to be
A. located on the cell wall
B. composed of polysaccharides
C. found mostly in virulent strains
D. used to characterize these species
The reservoir of Salmonella typhi is
A. dogs
B. cats
C. pigs
D. humans
Culture media for isolation of S.typhi from stool is
A. blood plate
B. SS plate
C. chocolate plate
D. common plate
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