Microbiology

Question 1

Aerobes:

Gram positive cocci
Gram positive bacilli

Gram negative cocci
Gram negative bacilli

Answer 1

Gram positive cocci: staph, strep
Gram positive bacilli: Listeria

Gram negative cocci: Neisseria (diplococci)
Gram negative bacilli: E.coli, pseudomonas

Question 2

Anaerobes:

Cocci
Bacilli

Answer 2

Cocci: Peptococci

Bacilli: Bacteroides, Clostridium difficile

Question 3

Which are acid fast bacteria and what is used

Answer 3

Mycobacterium

Ziehl-Neelson

Question 4

Bed side test for UTI

Answer 4

Urine dip

Shows signs of infection and blood in urine

culture is suspicion

Question 5

Tests for H.Pylori

Answer 5

Radiolabelled urea breathing test

• If urease enzyme present due to h.pylori then radio labelled CO2 will be breathed off
• This enzyme makes ammonia and CO2 to neutralise acid in stomach to help h.pylori survive

CLO test
- Biopsy taken and tested with dye which changes colour if H.Pylori present