Which of the following food items is most frequently associated with infant botulism?
A. Corn syrup
B. Canned infant formula
C. Liquid multivitamins
D. Honey
E. Jarred baby food
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All of the following statements regarding Clostridium perfringens are correct EXCEPT:
A. It produces an enterotoxin
B. It produces a double zone of β-hemolysis when grown on blood agar
C. Some strains are aerotolerant
D. It is the most common cause of antibiotic-associated diarrhea
E. It can cause intravascular hemolysis
Symptoms of C. botulinum food poisoning include double vision, inabilityto speak, and respiratory paralysis. These symptoms are consistentwith
A. Invasion of the gut epithelium by botulinum
B. Secretion of an enterotoxin
C. Endotoxin shock
D. Ingestion of a neurotoxin
E. Activation of cyclic AMP
The first microorganism to satisfy Koch's postulates (in the late 19th century) was
A. Treponema pallidum
B. Stenotrophomonas maltophilia
C. Mycobacterium leprae
D. Bacillus anthracis
E. Neisseria gonorrhoeae
Which one of the following is an important virulence factor of Bacillus anthracis?
A. Protective antigen
B. Lipopolysaccharide
C. Pili
D. A toxin that inhibits peptide chain elongation factor EF-2
E. Lecithinase
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