Microbial Diseases of the Skin and Eyes

Question 1

Relationship b/w Perspiration and Microbial growth

Answer 1

1. Perspiration provides moisture and some nutrients for microbial growth.
2. However, it contains salt, which inhibits many microorganisms; the enzyme lysozyme, which is capable of breaking down the cell walls of certain bacteria

Question 2

Sebum

1. What’s in sebum?
2. Functions of sebum?

Answer 2

1. Secreted by oil glands; It is a mixture of lipids, proteins and salts that prevents skin and hair from drying out
2. Also nutritive for many microorganisms

Question 3

List the 4 common types of lesions

Answer 3

1. Vesicle: small, fluid-filled lesions
2. Bulla: larger fluid-filled lesions
3. Macule: flat lesions that are often reddish
4. Pustule (papule): raised lesions; when they contain pus, they are called pustules; if not, they are called papules

Question 4

Distinguish b/w an exanthem and enanthem

Answer 4

1. Exanthem: rash on skin

2. Enanthem: rash on mucous membranes

Question 5

Impetigo: causative bacteria? Symptoms

Answer 5

1. Staphylococcus aureus

2. Streptococcus pyogenes

Question 6

Necrotizing faciitis:

1. Causative bacteria
2. Symptoms
3. Treatment

Answer 6

1. Streptococcus pyogenes
2. Extensive tissue destruction
3. Surgical removal of tissue