Use the following choices to answer questions 7 through 9.
a. Pseudomonas
b. Staphylococcus aureus
c. scabies
d. Sporothrix
e. virus


Microscopic examination of the patient’s ulcer reveals 10μm ovoid cells.

Use the following information to answer questions 3 and 4. A 12-year old boy had a fever, rash, headache, sore throat, and cough. He also had a macular rash on his trunk, face, and arms. A throat culture was negative for Streptococcus pyogenes.

All of the following are complications of this disease except

a. middle ear infections.

b. pneumonia.

c. birth defects.

d. encephalitis.

e. All are complications of this disease.

A patient has conjunctivitis. If you isolated Pseudomonas from the patient’s mascara, you would most likely conclude all of the following except that

a. the mascara was the source of the infection.

b. Pseudomonas is causing the infection.

c. Pseudomonas has been growing in the mascara.

d. the mascara was contaminated by the manufacturer.

e. All of the above are valid conclusions.

You microscopically examine scrapings from a case of Acanthamoeba keratitis. You expect to see

a. nothing.

b. viruses.

c. gram-positive cocci.

d. eukaryotic cells.

e. gram-negative cocci.

Use the following choices to answer questions 7 through 9.

a. Pseudomonas

b. Staphylococcus aureus

c. scabies

d. Sporothrix

e. virus

Nothing is seen in microscopic examination of a scraping from the patient’s rash.

Use the following choices to answer questions 7 through 9.

a. Pseudomonas

b. Staphylococcus aureus

c. scabies

d. Sporothrix

e. virus

Microscopic examination of scrapings from the patient’s rash shows gram-negative rods.

Which of the following pairs is mismatched?

a. leading infectious cause of blindness—Chlamydia

b. chickenpox—shingles

c. HSV-1—encephalitis

d. Buruli ulcer—stomach acid

e. none of the above

DRAW IT On the following figure, show the sites of the following infections: impetigo, folliculitis, acne, warts, shingles, sporotrichosis, pediculosis.

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Complete the following table of epidemiology.

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