Fungal

Question 1

Describe Staph sp.

Answer 1

Gram +ve cocci in clusters

Aerobic + facultatively anaerobic

Question 2

What are the two types of Staph

Answer 2

1. Staph. aureus (coagulase +ve)

2. Coagulase -ve Staph.

Question 3

What can STaph. saprophyticus cause?

Answer 3

UTI

Question 4

Describe Streptococcus species

Answer 4

Gram +ve cocci in chains (strips)

Aerobic (and facultatively anaerobic)

Question 5

Descibe the classification of haemolysis on blood agar

Answer 5

beta - haemolytic (complete)
alpha - haemolytic (partial)
gamma - non-haemolytic (none)

Question 6

Describe a and b beta-haemolytic Strep.

Answer 6

A) throat, severe skin infections

B) menigitis in neonates

Question 7

Name 2 categories of alpha-haemolytic strep.

Answer 7

Strep. pneumoniae - pathogen, commonest cause of pneumonia

Strep. viridans - commensals of mouth, throat, vagina (rare)

Question 8

Whats a common commensal of bowel and UTI?

Answer 8

Enterococcus species (E.faecalis etc.)

Question 9

What is sebum and what does it do?

Answer 9

fatty acids, inhibits bacterial growth

Question 10

What can Staph. aureus cause?

Answer 10

Cellulitis, infected eczema, impetigo, wound infection, staphylococcal

Question 11

What can Strep. pyogenes cause?

Answer 11

Infected eczema, impetigo, cellulitis, erysipelas, necrotising fascitis

Question 12

How do you treat Staph aureus?

Answer 12

Flucloxacillin

Question 13

Strep. pyogenes is treated by?

Answer 13

Penicillin + flucloxacillin

Question 14

What is type 1 necrotising faciitis?

Answer 14

mixed anaerobes & coliforms, usually post-abdominal surgery

Question 15

Type 2 necrotising faciitis?

Answer 15

Group A strep infection