U E S T I O N S

2. Staphylococcus aureus can be responsible for which of these following conditions?

A. Impetigo B. Food poisoning C. Toxic shock syndrome D. Scalded skin syndrome E. All of the above

3. The main effect of staphylococcal protein A is to

A. interfere with phagocytosis.

B. enhance the attachment of the Fc portion of antibody to phagocytes.

C. coagulate plasma.

D. kill white blood cells.

E. degrade collagen.

4. Which of the following is essential for the virulence of Streptococcus pyogenes?

A. Protease B. Hyaluronidase C. DNase

D. All of the above E. None of the above

5. Which of the following statements is true of streptococcal acute glomerulonephritis?

A. It is a streptococcal infection of the kidneys.

B. It is caused by immune complexes containing streptococcal antigen.

C. It is caused by most strains of ^-hemolytic group A streptococci.

D. It is the result of a streptococcal toxin directed against the kidneys.

E. All of the above.

6. All of the following are true of Rocky Mountain spotted fever, except

A. the disease is most prevalent in the western United States.

B. it is caused by an obligate intracellular bacterium.

C. it is a zoonosis transmitted to human beings by ticks.

D. those with the disease characteristically develop a hemor-rhagic rash.

E. antibiotic therapy is usually curative if given early in the disease.

560 Chapter 22 Skin Infections

7. All of the following are true of Lyme disease, except

A. it is caused by a spirochete.

B. it is transmitted by certain species of ticks.

C. it occurs only in the region around Lyme, Connecticut.

D. most cases get a rash that looks like a target.

E. it can cause heart and nervous system damage.

8. Which of the following statements is more likely to be true of measles (rubeola) than German measles (rubella)?

A. Koplik's spots are present.

B. It causes birth defects.

C. It causes only a mild illness.

D. Human beings are the only natural host.

E. Attenuated virus vaccine is available for prevention.

9. All of the following must be cultivated in cell cultures instead of cell-free media, except

A. Rickettsia rickettsii.

B. rubella virus.

C. varicella-zoster virus.

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