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Microbiology, 2021

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892 21 • Review Questions<br />

acquired infection. In secondary cutaneous<br />

aspergillosis, the fungus enters via the<br />

respiratory system and disseminates<br />

systemically, manifesting in lesions on the skin.<br />

• The most common subcutaneous mycosis is<br />

sporotrichosis (rose gardener’s disease),<br />

caused by Sporothrix schenkii.<br />

• Yeasts of the genus Candida can cause<br />

opportunistic infections of the skin called<br />

candidiasis, producing intertrigo, localized<br />

rashes, or yellowing of the nails.<br />

21.5 Protozoan and Helminthic<br />

Infections of the Skin and Eyes<br />

• The protozoan Acanthamoeba and the helminth<br />

REVIEW QUESTIONS<br />

Multiple Choice<br />

1. _____________ glands produce a lipid-rich<br />

substance that contains proteins and minerals<br />

and protects the skin.<br />

a. Sweat<br />

b. Mammary<br />

c. Sebaceous<br />

d. Endocrine<br />

2. Which layer of skin contains living cells, is<br />

vascularized, and lies directly above the<br />

hypodermis?<br />

a. the stratum corneum<br />

b. the dermis<br />

c. the epidermis<br />

d. the conjunctiva<br />

3. Staphylococcus aureus is most often associated<br />

with being<br />

a. coagulase-positive.<br />

b. coagulase-negative.<br />

c. catalase-negative.<br />

d. gram-negative<br />

4. M protein is produced by<br />

a. Pseudomonas aeruginosa<br />

b. Staphylococcus aureus<br />

c. Propionibacterium acnes<br />

d. Streptococcus pyogenes<br />

Loa loa are two parasites that can breach the<br />

skin barrier, causing infections of the skin and<br />

eyes.<br />

• Acanthamoeba keratitis is a parasitic infection<br />

of the eye that often results from improper<br />

disinfection of contact lenses or swimming<br />

while wearing contact lenses.<br />

• Loiasis, or eye worm, is a disease endemic to<br />

Africa that is caused by parasitic worms that<br />

infect the subcutaneous tissue of the skin and<br />

eyes. It is transmitted by deerfly vectors.<br />

5. ___________ is a major cause of preventable<br />

blindness that can be reduced through improved<br />

sanitation.<br />

a. Ophthalmia neonatorum<br />

b. Keratitis<br />

c. Trachoma<br />

d. Cutaneous anthrax<br />

6. Which species is frequently associated with<br />

nosocomial infections transmitted via medical<br />

devices inserted into the body?<br />

a. Staphylococcus epidermidis<br />

b. Streptococcus pyogenes<br />

c. Proproniobacterium acnes<br />

d. Bacillus anthracis<br />

7. Warts are caused by<br />

a. human papillomavirus.<br />

b. herpes simplex virus.<br />

c. adenoviruses.<br />

d. parvovirus B19.<br />

8. Which of these viruses can spread to the eye to<br />

cause a form of keratitis?<br />

a. human papillomavirus<br />

b. herpes simplex virus 1<br />

c. parvovirus 19<br />

d. circoviruses<br />

9. Cold sores are associated with:<br />

a. human papillomavirus<br />

b. roseola<br />

c. herpes simplex viruses<br />

d. human herpesvirus 6<br />

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