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Chapter 15 extra Q's

front 1

Which disease-associated fungi or fungal characteristics are mismatched?
A.) Cryptococcus neoformans - capsules
B.) Amantia - neurotoxin
C.) trichothecenes - inhibit protein synthesis
D.) Claviceps purpura - aflatoxin
E.) ergot - sclerotia

back 1

D

front 2

25) Twenty-five people developed symptoms of nausea, vomiting, and diarrhea three to six hours after attending a church picnic where they ate a ham and green bean casserole with cream sauce. The most likely cause of this case of food intoxication is

A) botulinum toxin.

B) aflatoxin.

C) staphylococcal enterotoxin.

D) erythrogenic toxin.

E) cholera toxin.

back 2

C

front 3

43) Nonpathogenic Vibrio cholerae can acquire the cholera toxin gene by

A) phagocytosis.

B) lysogenic conversion.

C) conjugation.

D) transformation.

E) infecting a pathogenic Vibrio cholerae.

back 3

B

front 4

The best description of direct damage by a pathogen is
A.) poisonous substances secreted by viruses kill cells.
B.) capsule components of pathogens kill cells.
C.) superantigens cause cytokine release which then cause symptoms of disease.
D.) host cells destroyed when pathogens metabolize and multiply.
E.) protein synthesis is interrupted by toxins.

back 4

D

front 5

Which is NOT specifically employed by pathogens to avoid destruction by phagocytosis?
A.) possessing ability to replicate within a phagolysosome
B.) possessing ability to remain dormant within a phagocyte
C.) producing superantigens
D.) producing a capsule
E.) forming biofilms

back 5

C

front 6

A retired contract administrator who enjoyed gardening sought medical attention for what appeared to be a sinus infection. He received antimicrobials but the conditioned worsened and he was experiencing severe painful spasms in his jaw. He admitted to injuring himself with a gardening tool while wearing sandals in the yard but did not seek medical attention for the wound. The man is likely experiencing
A.) intoxication caused by a focal C. tetani infection.
B.) allergic rhinitis.
C.) septic shock.
D.) LPS-mediated inflammatory response.
C.) meningitis.

back 6

A

front 7

For what reason might the ID50 for Salmonella Typhi decrease when a rat simultaneously ingests sulfa drugs with the pathogen?
A.) The antimicrobial inactivates stomach acid and allows the pathogen to more readily pass to the intestine.
B.) It would not; the ID50 goes up.
C.) The antimicrobial interferes with the microbiome enabling the pathogen to more easily establish infection.
D.) Salmonella Typhi becomes stronger in the presence of sulfa drugs.
E.) There would not be an effect on the ID50.

back 7

C

front 8

Which pathogen and virulence factor are mismatched?
A.) Neisseria gonorrhoeae - IgA protease
B.) Shigella sonnei - coagulase
C.) Clostridium - hyaluronidase
D.) Streptococcus pyogenes - M protein
E.) Streptococcus pneumoniae - capsule

back 8

B