Ch 16 - Infections of the Skin and Eyes

What is not part of the integument?

bones

Keratin

a fibrous protective protein found in hair, skin and nails

list 6 bacteria that are part of the skin’s normal microbiota

• Streptococcus

• Staphylococcus

• Corynebacterium

• Propionibacterium

• Pseudomonas

• Lactobacillus

exanthem

the medical term for a rash

macule

a small flat area of discolored skin

pustule

a raised vesicle filled with fluid, specifically pus

papule

a slightly raised colored bump

T/F: Measles is highly contagious and 9/10 susceptible individuals will contract the disease if exposed.

True

T/F: The rash for Fifth Disease can be alleviated by antibiotics.

False

Who is most likely to develop fifth disease?

Children

Which disease is caused by S. aureus and causes large blisters followed by peeling/desquamation?

Scaleded Skin Syndrome

Which disease is caused by S. aureus and causes a raised red pustulent lesion?

MRSA

T/F: Chickenpox is a relatively harmless childhood disease.

false

T/F: A rash that does not cross the midline of the body is possibly shingles.

True

What age do individuals typically develop shingles?

50+ years

If a person who has no immunity to chickenpox comes into contact with someone who has shingles, they are at risk for:

chickenpox

Where does chickenpox go dormant after the initial acute infection?

nerves

What distinguishes a smallpox rash from rashes caused by other diseases?

The rash is pustular with an indented center

Edward Jenner noticed that individuals with ____ had some immunity to smallpox.

cowpox

How long has smallpox believed to be circulating in human populations?

at least 3000 years

T/F: A single case of smallpox would be considered an immediate public health emergency.

True

Which of the following is the causative agent of Leishmaniasis?

protozoan

How is Leishmaniasis transmitted?

sand fly bites

Which of the following is painless black lesion from a ruptured anthrax papule?

eschar

What is the reservoir for Bacillus anthracis?

soil

What is the best way to prevent impetigo, cellulitis, and ringworm?

hygiene and avoiding contact

What is the term for ringworm of the foot?

tinea pedis

What is the term for ringworm of the groin?

tinea cruris

T/F: Ringworm is not contagious

False

Viral conjunctivitis usually presents with ____ exudate while bacterial conjunctivitis usually produces ____ exudate.

clear, milky/purulent

What is another name for conjunctivitis?

pink eye

Neonatal conjunctivitis usually comes from:

vertical transmission during birth

The bacterial species most commonly associated with neonatal conjunctivitis are:

N. gonorrhoeae and C. trachomatis

What is keratitis?

deeper infection of the eye/cornea

Why are contact lens wearers more likely to develop keratitis?

poor contact lens hygiene practices such as extending wear

Keratitis

an eye condition that can be caused by infection from an amoeba

Which layer(s) of the skin is/are infected in cellulitis?

dermis and subcutaneous tissues