Microbiology: Bacterial and Fungal Skin Infections

Question 1

How to diagnose an infection if wound is open

Answer 1

Swab the wound

Question 2

How to diagnose infection if lesion is deeper

Answer 2

Sample of pus/tissue

Question 3

Colour of staph. aureus on blood agar

Answer 3

Golden

Question 4

Colour of coagulase negative staph. on blood agar

Answer 4

White

Question 5

What is the only staph species that is coagulase positive

Answer 5

Staph. aureus

Question 6

Describe staphylococcus sp.

Answer 6

Gram positive cocci in clusters

Both aerobic and anaerobic

Question 7

What protein does staph. aureus produce and what is its function

Answer 7

Coagulase and it clots plasma

Question 8

How treat with staph. aureus

Answer 8

Flucloxacillin

Question 9

Describe staphylococcal scalded skin syndrome

Answer 9

Painful red rash caused by staph aureus which produces a toxin that damages skin

Question 10

Describe impetigo

Answer 10

Common and highly contagious bacterial infection that causes sores and blisters

Question 11

MRSA treatment options (4)

Answer 11

Doxycycline, co-triamoxazole, clindamycin and vanomycin

Question 12

What does staph. saprophyticus cause

Answer 12

UTIs in women at child bearing age

Question 13

Describe streptococcus sp.

Answer 13

Gram positive cocci in chains

Question 14

What does beta haemolytic mean

Answer 14

Complete haemolysis has occured

Question 15

What does alpha haemolytic mean

Answer 15

Partial haemolysis has occured

Question 16

Examples of group A beta haemolytic infections

Answer 16

Throat and skin infections

Question 17

Examples of group B beta haemolytic infections

Answer 17

Meningitis in neonates

Question 18

What is the most common bacteria in pneumonia

Answer 18

Strep. pneumoniae

Question 19

What bacteria is a commensal of the throat, mouth, vagina and causes endocarditis

Answer 19

Strep. viridans

Question 20

What bacteria is a commensal of the bowel and commonly causes UTIs

Answer 20

Enterococcus sp.

Question 21

Describe necrotising fasciitis

Answer 21

Bacterial infection spreading along fascial plane below skin surface

Question 22

Describe type 1 necrotising fasciitis

Answer 22

Mixed anaerobes and coliforms, usually post abdominal surgery

Question 23

Describe type 2 necrotising fasciitis

Answer 23

Group A strep infection

Question 24

When to take swabs in leg ulcers

Answer 24

If cellulitis or infection is suspected

Question 25

What does tinea mean

Answer 25

Ringworm

Question 26

What does tinea capitis mean

Answer 26

Scalp

Question 27

What does tinea barbae mean

Answer 27

Beard

Question 28

What does tinea corporis mean

Answer 28

Body

Question 29

What does tinea manuum mean

Answer 29

Hand

Question 30

What does tinea unguium mean

Answer 30

Nails

Question 31

What does tinea cruris mean

Answer 31

Groin

Question 32

What does tinea pedis mean

Answer 32

Foot (athletes foot)

Question 33

Treatment for dermatophyte infections

Answer 33

Clotrimazole | Topical nail paint

Question 34

Treatment for scalp fungal infections

Answer 34

Terbinafine orally | Itraconazole orally

Question 35

Where do candida infections often occur

Answer 35

Infection in skin folds where are is warm and moist

Question 36

How to diagnose candida

Answer 36

Swab for culture

Question 37

Treatment for candida

Answer 37

Clotrimoazole cream | Oral flucloxacillin

Question 38

Describe scabies

Answer 38

A contagious skin condition caused by tiny mites burrowing into the skin. Causes itching that is worse at night

Question 39

Treatment for scabies

Answer 39

``` Malathion lotion Benzyl benzoate (avoid in children) ```

Question 40

Treatment for lice

Answer 40

Malathion lotion