Content check — Microbiology, Chapter 21: Skin and Eye Infections

Every problem in the chapter beside the book’s answer, a chapter at a time as you scroll.

Chapter 21: Skin and Eye Infections

26 problems · 0 figures

21-1 §21.MC source ↗

_____________ glands produce a lipid-rich substance that contains proteins and minerals and protects the skin.

a.
Sweat
b.
Mammary
c.
Sebaceous
d.
Endocrine

Answer

C. Sebaceous

21-2 §21.MC source ↗

Which layer of skin contains living cells, is vascularized, and lies directly above the hypodermis?

a.
the stratum corneum
b.
the dermis
c.
the epidermis
d.
the conjunctiva

Answer

B. the dermis

21-3 §21.MC source ↗

Staphylococcus aureus is most often associated with being

a.
coagulase-positive.
b.
coagulase-negative.
c.
catalase-negative.
d.
gram-negative

Answer

A. coagulase-positive.

21-4 §21.MC source ↗

M protein is produced by

a.
Pseudomonas aeruginosa
b.
Staphylococcus aureus
c.
Cutibacterium acnes
d.
Streptococcus pyogenes

Answer

D. Streptococcus pyogenes

21-5 §21.MC source ↗

___________ is a major cause of preventable blindness that can be reduced through improved sanitation.

a.
Ophthalmia neonatorum
b.
Keratitis
c.
Trachoma
d.
Cutaneous anthrax

Answer

C. Trachoma

21-6 §21.MC source ↗

Which species is frequently associated with nosocomial infections transmitted via medical devices inserted into the body?

a.
Staphylococcus epidermidis
b.
Streptococcus pyogenes
c.
Proproniobacterium acnes
d.
Bacillus anthracis

Answer

A. Staphylococcus epidermidis

21-7 §21.MC source ↗

Warts are caused by

a.
human papillomavirus.
b.
herpes simplex virus.
c.
adenoviruses.
d.
parvovirus B19.

Answer

A. human papillomavirus.

21-8 §21.MC source ↗

Which of these viruses can spread to the eye to cause a form of keratitis?

a.
human papillomavirus
b.
herpes simplex virus 1
c.
parvovirus 19
d.
circoviruses

Answer

B. herpes simplex virus 1

21-9 §21.MC source ↗

Cold sores are associated with:

a.
human papillomavirus
b.
roseola
c.
herpes simplex viruses
d.
human herpesvirus 6

Answer

C. herpes simplex viruses

21-10 §21.MC source ↗

Which disease is usually self-limiting but is most commonly treated with ganciclovir if medical treatment is needed?

a.
roseola
b.
oral herpes
c.
papillomas
d.
viral conjunctivitis

Answer

A. roseola

21-11 §21.MC source ↗

Adenoviruses can cause:

a.
viral conjunctivitis
b.
herpetic conjunctivitis
c.
papillomas
d.
oral herpes

Answer

A. viral conjunctivitis

21-12 §21.MC source ↗

___________ is a superficial fungal infection found on the head.

a.
Tinea cruris
b.
Tinea capitis
c.
Tinea pedis
d.
Tinea corporis

Answer

B. Tinea capitis

21-13 §21.MC source ↗

For what purpose would a health-care professional use a Wood’s lamp for a suspected case of ringworm?

a.
to prevent the rash from spreading
b.
to kill the fungus
c.
to visualize the fungus
d.
to examine the fungus microscopically

Answer

C. to visualize the fungus

21-14 §21.MC source ↗

Sabouraud dextrose agar CC is selective for:

a.
all fungi
b.
non-saprophytic fungi
c.
bacteria
d.
viruses

Answer

B. non-saprophytic fungi

21-15 §21.MC source ↗

The first-line recommended treatment for sporotrichosis is:

a.
itraconazole
b.
clindamycin
c.
amphotericin
d.
nystatin

Answer

A. itraconazole

21-16 §21.MC source ↗

Which of the following is most likely to cause an Acanthamoeba infection?

a.
swimming in a lake while wearing contact lenses
b.
being bitten by deerflies in Central Africa
c.
living environments in a college dormitory with communal showers
d.
participating in a contact sport such as wrestling

Answer

A. swimming in a lake while wearing contact lenses

21-17 §21.MC source ↗

The parasitic Loa loa worm can cause great pain when it:

a.
moves through the bloodstream
b.
exits through the skin of the foot
c.
travels through the conjunctiva
d.
enters the digestive tract

Answer

C. travels through the conjunctiva

21-18 §21.MC source ↗

A patient tests positive for Loa loa antibodies. What does this test indicate?

a.
The individual was exposed to Loa loa at some point.
b.
The individual is currently suffering from loiasis.
c.
The individual has never been exposed to Loa loa.
d.
The individual is immunosuppressed.

Answer

A. The individual was exposed to Loa loa at some point.

21-19 §21.MC source ↗

________ is commonly treated with a combination of chlorhexidine and polyhexamethylene biguanide.

a.
Acanthamoeba keratitis
b.
Sporotrichosis
c.
Candidiasis
d.
Loiasis

Answer

A. Acanthamoeba keratitis

21-20 §21.FITB source ↗

The ________ is the outermost layer of the epidermis.

Answer

stratum corneum

21-21 §21.FITB source ↗

The mucous membrane that covers the surface of the eyeball and inner eyelid is called the ________.

Answer

conjunctiva

21-22 §21.FITB source ↗

A purulent wound produces ________.

Answer

pus

21-23 §21.FITB source ↗

Human herpesvirus 6 is the causative agent of ________.

Answer

roseola

21-24 §21.FITB source ↗

The most common subcutaneous mycosis in temperate regions is ________.

Answer

sporotrichosis

21-25 §21.FITB source ↗

Eye worm is another name for ________.

Answer

loiasis

21-26 §21.FITB source ↗

The ________ is the part of the eye that is damaged due to Acanthamoeba keratitis.

Answer

cornea

Loading chapter 22…

Problems and answers are adapted from Microbiology by Nina Parker, Mark Schneegurt, Anh-Hue Thi Tu, Philip Lister and Brian M. Forster, OpenStax, and are used under the CC BY-NC-SA 4.0 licence. Access for free at https://openstax.org/books/microbiology/pages/1-introduction. Illustrations: Copyright Rice University, OpenStax, under CC BY-NC-SA 4.0 license. This adaptation is released under the same licence, is non-commercial, and is neither affiliated with nor endorsed by OpenStax or Rice University.