EXAM 4 CHAPTER 21

Question 1

What are the barriers of the skin that must be overcome for infections to establish?

Answer 1

Epidermis. Sweat increases the potential for microbial growth by adding moisture to the skin. More microbes in region that contains more sweat (underarms, groin)

Question 2

Abscess

Answer 2

Localized collection of pus

Question 3

Bulla

Answer 3

Fluid filled blister no more than 5mm in diameter

Question 4

Carbuncle

Answer 4

Deep, pus-filled abscess generally formed from multiple furuncles

Question 5

Crust

Answer 5

Dried fluid from a lesion on skin surface

Question 6

Cyst

Answer 6

Encapsulated sac filled with fluid, semi-solid matter or gas typically located below upper skin layers

Question 7

Folliculitis

Answer 7

A localized rash due to inflammation of hair follicles

Question 8

Furuncle

Answer 8

Pus filled abscess due to infection of a hair follicle

Question 9

Macule

Answer 9

Smooth spots of discoloration of the skin

Question 10

Papule

Answer 10

Small bump raised on the skin

Question 11

Pseudocyst

Answer 11

Lesion that resembles a cyst but with less defined boundary

Question 12

Purulent

Answer 12

Pus-producing

Question 13

Pustules

Answer 13

Fluid or pus filled bumps on the skin

Question 14

Pyoderma

Answer 14

Any suppurative (pus-producing) infection of the skin

Question 15

Ulcer

Answer 15

Break in the skin; open sore

Question 16

Vesicle

Answer 16

Small fluid filled lesion

Question 17

Wheal

Answer 17

Swollen, inflamed skin that itches or burns

Question 18

Acute bacterial conjunctivitis has what discharge and is caused by what pathogen?

Answer 18

Purulent discharge. Haemophilus influenzae.

Question 19

Bacterial keratitis has what discharge or symptoms and is caused by what pathogen?

Answer 19

Redness and irritation. Staphylococcus epidermidis or pseudomonas aeruginosa

Question 20

Neonatal Conjunctivitis has what discharge or symptoms and is caused by what pathogen?

Answer 20

Purulent discharge, scarring and perforation of cornea. Chlamydia trachomatis.

Question 21

Trachoma (granular conjunctivits) has what discharge or symptoms and is caused by what pathogen?

Answer 21

Chronic scarring blindness. C. trachomatis

Question 22

What does P. acnes cause?

Answer 22

Acne

Question 23

What does S. pyogenes cause?

Answer 23

Cellulitis, erysipelas, erythema nodosum, impetigo

Question 24

What does S. aureus cause?

Answer 24

Impetigo

Question 25

What does K. pneumoniae cause?

Answer 25

Bacterial conjunctivitis

Question 26

What does P. aeruginosa cause?

Answer 26

Opportunistic infections of wounds and burns

Question 27

What is the difference between staphylococcal and streptococcal skin infections?

Answer 27

Staphylococcal infections are spread by skin to skin and look more like wounds whereas streptococcal is spread by respiratory droplets. Staphyl is presented as a wound and often has purulent discharge whereas Strepto is more of a rash and redness of the affected area.

Question 28

What is the etiologic agent of neonatal conjunctivitis?

Answer 28

Being born to someone with an STI (Chlamydia or Gonorrhea are common)

Question 29

Identify the etiologic agent of Trachoma?

Answer 29

Chlamydia Trachomatis

Question 30

What are ways that HPV infections present?

Answer 30

Warts, plantar warts, flat warts, filiform warts

Question 31

What is the difference between viral and bacterial conjunctivitis?

Answer 31

Viral has nonpurulent watery discharge whereas bacterial has purulent discharge

Question 32

What are the fungal pathogens of the skin?

Answer 32

Dermatophytes

Question 33

Where is Tinea corporis located in the body?

Answer 33

Body

Question 34

Where is Tinea Capitis located in the body?

Answer 34

Scalp

Question 35

Where is Tinea Pedis located in the body?

Answer 35

Feet

Question 36

Where is Tinea barbae located in the body?

Answer 36

Beard

Question 37

Where is Tinea cruris located in the body?

Answer 37

Groin

Question 38

Where is Tinea unguium located in the body?

Answer 38

Toenails/fingernails

Question 39

Loiasis is caused by what

Answer 39

Parasitic helminth

Question 40

What causes warts

Answer 40

Human papillomaviruses

Question 41

What causes cold sores

Answer 41

Herpes simplex virus