Diseases of the Skin and Eyes

Question 1

What bacteria causes Necrotizing Fascitits?

Answer 1

Streptococcus pyogenes

Question 2

What bacteria causes Impetigo?

Answer 2

Streptococcus pyogenes (in developing countries)
Staphylococcus aureus (United States)

Question 3

What bacteria causes Cellulitis?

Answer 3

Streptococcus pyogenes

Staphylococcus aureus

Question 4

What bacteria causes Folliculitis, Furuncles, and Carbuncles?

Answer 4

Staphylococcus aureus

Question 5

What bacteria causes Trachoma?

Answer 5

Chylamydia trachomatis

Question 6

What bacteria causes Conjunctivitis (pink eye)?

Answer 6

Haemophilus Influenzae

Question 7

What virus causes Cold Sores?

Answer 7

Herpes Simplex Virus I or II

Question 8

What virus causes Conjunctivitis (pink eye)?

Answer 8

.

Question 9

What virus causes

Answer 9

.

Question 10

What virus causes

Answer 10

..

Question 11

What virus causes

Answer 11

.

Question 12

What virus causes

Answer 12

.

Question 13

What virus causes

Answer 13

.

Question 14

What virus causes

Answer 14

.

Question 15

What type of agent is streptococcus pyogenes?

Answer 15

Gram positive bacteria arranged in chains.

Question 16

What does cocci or coccus mean?

Answer 16

refers to circular shaped bacterium.

Question 17

What type of agent is Staphylococcus aureus?

Answer 17

Gram positive bacteria arranged in clusters.

Question 18

What type of agent is Chlamydia trachomatis?

Answer 18

Small Gram negative bacteria, coccoid shaped

Question 19

What is the difference between gram positive and gram negative bacterium?

Answer 19

Gram positive bacterium have thick cell wall composed of peptidoglycan.

Gram negative have an outer membrane composed of lippo-polysaccharides (endotoxins), in conjunction with the peptidoglycan cell wall.

Question 20

What type of agent is Haemophilus Influenzae?

Answer 20

Gram negative bacilli,

Question 21

What are Bacilli?

Answer 21

Rod-shaped Bacterium

Question 22

How is Necrotizing Fascitis transmitted?

Answer 22

Endogenous spread to wound

Direct contact

Question 23

How is Impetigo transmitted?

Answer 23

Direct contact with infected person or fomite

Question 24

How is cellulitis transmitted?

Answer 24

Endogenous bacteria in people with Strep. pyogenes respiratory or skin infection.
Begins with a bruise or other skin wound through which bacteria can penetrate.

Question 25

How are Folliculitis, Furuncles, and Carbuncles transmitted?

Answer 25

Endogenous bacteria that colonize hair follicles.

Question 26

How is Trachoma transmitted?

Answer 26

Contact with eye droplets of an infected person. 
Infected fomites (Dirty/shared towels).

Question 27

How is Conjunctivitis (bacteria, pink eye) transmitted?

Answer 27

Direct contact with infected eye secretions.

Question 28

What are the symptoms of Necrotizing Fascitis?

Answer 28

At the site of infection–swollen, hot, painful, bullae (fluid-filled blisters) forms.
flu-lie symptoms from systemic toxicity include Fever, nausea, fatigue, and vomiting.
Late symptoms include dizziness, confusion, and shock.

Question 29

What are the symptoms of impetigo?

Answer 29

Vesicles on exposed skin develop into pustules, then rupture and crust over.

Question 30

What is a vesicle?

Answer 30

a fluid- or air-filled cavity or sac

Question 31

What are the symptoms of Cellulitis?

Answer 31

Rapid spread of infection of subcutaneous connective tissues…similar to Erysipelas

Painful erythema and edema of the skin. Poorly defined edges of infection site.

Fever

Lymphadenopathy–chronically swollen lymph nodes

Erythema-superficial reddening of the skin, usually in patches, as a result of injury or irritation causing dilatation of the blood capillaries.

Edema- (a condition characterized by an excess of watery fluid collecting in the cavities or tissues of the body.)

Question 32

What are the symptoms of folliclitis, furuncles, and carbuncles?

Answer 32

Develops around hair follicles and sebaceous/sweat glands.

Forms a red papule which progresses to a pustule.

This is a Suppurative (formation or discharge of pus) lesion forming on the back, neck, or buttocks.

Carbuncles have multiple foci, and extend to deeper tissues.

Develops within 3-5 days, but are self-limiting–spontaneous drainage, relief of pain, healing.

Question 33

What are the symptoms of Trachoma?

Answer 33

Inflamation or swelling of the conjunctiva and eyelids
Conjunctiva–the mucous membrane that covers the front of the eye and lines the inside of the eyelids.

Trichiasis–ingrowth or introversion of the eyelashes that
leads to
irritation of cornea leads to
corneal vascularization (blood shot into cornea region) and opacity.

Question 34

What are the symptoms of bacterial Conjunctivitis (pink eye)?

Answer 34

Acute purulent conjunctivitis with Crusting on eyelids.
red eye, burning
sensitivity to light.
Purulent–consisting of, containing, or discharging pus