Microbio

Question 1

What type of bacteria is pseudomonas aerugionsa and what infections is is associated with?

Answer 1

aerobic
gram -ve rod

chest infections (especially in cystic fibrosis)
skin: burns, wound infections, ‘hot tub’ folliculitis
otitis externa (especially in diabetics who may develop malignant otitis externa)
urinary tract infections

produces both an endotoxin (causes fever and shock) and exotoxin A

Question 2

What is the most commonly affected site by necrotising fasciitis?

Answer 2

The most commonly affected site is the perineum (Fournier’s gangrene).

Question 3

What skin abnormality is associated with mycoplasma pneumoniae?

Answer 3

erythema multiforme

Question 4

Which class of antibiotic does vancomycin belong to?

Answer 4

glycopeptide

Question 5

What does JC virus cause?

Answer 5

progressive multifocal encephalopathy

Question 6

What bacteria causes scarlet fever?

Answer 6

Strep pyogenes (Group A strep)

Question 7

What is the commonest cause of aseptic meningitis?

Answer 7

Enteroviruses

e.g. echovirus or coxsackievirus