Bacterial Skin Infections

Question 1

What is this and what causes it?

Answer 1

Impetigo

Commonly Staph aureus

Question 2

What is impetigo and how is it described?

Answer 2

Very infections superficial skin infection by S.aureus.

Crusty, erythematous, papular rash usually on the face.

It can also form bullae

Question 3

What is this and what causes it?

Answer 3

Folliculitis

S.aureus

Question 4

What is this called, what is it and what causes it?

Answer 4

Furuncle - small abscess from sebaceuous glands or hair follicles

S.aureus

Question 5

What is this called, what is it and what causes it?

Answer 5

Carbuncle

Large abscess formed from a collection of furuncles

S.aureus

Question 6

What types of infection does S.aureus tend to cause?

Answer 6

Superficial

Question 7

What types of infection does Strep pyogenes tend to cause?

Answer 7

Deeper

Question 8

What is this called, what is it and what causes it?

Answer 8

Ecthyma

It is localised infection that spreads to the dermis

Strep.pyogenes

Question 9

How do you treat superficial skin lesions such as impetigo, ecthyma, furuncles, carbuncles and folliculitis?

Answer 9

1. Conservative - washing, moisturising
2. Topical antibiotics eg FUSIDIC ACID
3. Oral antibiotics - Flucox for strep, penicllin for staph
4. Incision or drainage

Question 10

What is this?

Answer 10

Erysipelas

Question 11

What is this?

Answer 11

Cellulitis

Question 12

What is erysipelas and cellulitis and what tends to cause them?

Answer 12

Thise are spreading infections of the skin:

Erysipelas - Dermis and upper cutaneous tissue

Cellulitis - Deeper cutaneous tissues

Strep pyogenes

Question 13

How is erysipelas distinguished from cellulitis?

Answer 13

It is more defined

Question 14

What are the symptoms of erysipleas and cellulitis?

Answer 14

Redness

Swelling

Pain

Heat

Question 15

How are erysipelas and cellulitis managed?

Answer 15

Antibiotics

Leg elevation, analgesia and rest

Question 16

What are some possible complications of cellulitis?

Answer 16

Localised necrosis

Bacteremia

Oedema

Question 17

What is this?

Answer 17

Necrotising fasciitis

Question 18

What is necrotising fasciitis and what are the symptoms/What does it look like?

Answer 18

Medical emergency which spreads rapidly causing:

Extreme pain

Shock

Crepitus due to air

DARK AND WOODY

Question 19

What is the treatment for necrotising fasciitis?

Answer 19

IV antibiotics

?Amputation

Question 20

What is this and what causes it and what is its appearence?

Answer 20

Staph scalded skin syndrome from exfoliative toxin

Large bullae and blistering

Question 21

What are the symptoms of Staph scalded skin syndrome?

Answer 21

Pain

Question 22

What is the management of Staph scalded skin syndrome?

Answer 22

Antibiotics, analgesia, emolients

Question 23

What is this, how is it described and why does it happen?

Answer 23

Erythrasma

Macular hyperpigmentation due to stratum corneum thickening from infection

Question 24

What is this, how is it described and why does it happen?

Answer 24

Pitted keratolysis due to bacterium destroying keratin in stratum corneum

Question 25

What causes this rash and when does it appear?

Answer 25

Syphilis - t.pallidum 3-4 months after infection.

Question 26

What rash appears first in syphillis?

Answer 26

Primary chancre. Ulcerated lesion that is **PAINLESS AND NON BLEEDING** Usually on genitals

Question 27

How do you treat syphillis?

Answer 27

Penicillin

Question 28

What causes this type of rash and what is the rash called?

Answer 28

Erythema chronicum migrans (bullseye rash) - It grows and causes systemic symptoms like the flu Lyme disease

Question 29

What is this?

Answer 29

Lupus vulgaris caused by TB Cutaeneous lesions on the face that are painful

Question 30

What are these? Commonly occur in people who have fish. What causes them?

Answer 30

Fishtank granuloma from mycobaterium marinum Red scaly plaques on hand

Question 31

How do you know its erythema chronicum migrans and not erythema multiforme?

Answer 31

There is only ONE in erythema migrans

Question 32

What antibiotic could be good for skin infections?

Answer 32

Fusidic acid

Question 33

What is this?

Answer 33

Erythema toxicum neonatorum Autoimmune - not infective