Gram negtive bacteria

Question 1

What colour do Gram negative bacteria stain?

Answer 1

Red/pink (LPS dissolved by acetone + secondary stain)

Question 2

What are the two main classes of Gram negative cocci?

Answer 2

Neisseria meningitidis/gonorrhoeae

Moraxella catarrhalis

Question 3

What is the main symptom of moraxella catarrhalis?

Answer 3

Respiratory tract infections

Question 4

What are the three main classes of Gram negative bacilli?

Answer 4

Aerobic
Anaerobic
Microaerophilic

Question 5

How are Gram negative aerobic bacilli further distinguished?

Answer 5

Small (haemophilus influenza)
Large coliforms (escherichia coli/salmonella enterica and typhi)
Regular (pseudomonas)

Question 6

What symptom differs between e-coli and salmonella?

Answer 6

Escherichia coli presents with UTI

They both present with diarrhoea

Question 7

What are the two main types of Gram negative microaerophilic bacilli?

Answer 7

Helicobacter pylori

Campylobacter

Question 8

What symptom does helicobacter pylori present with?

Answer 8

Ulcers through damage to mucosa

Question 9

What symptom does campylobacter present with and where does the species originate?

Answer 9

Bloody diarrhoea (comes from animals)

Question 10

Haemophilus influenza presents with what symptom?

Answer 10

Respiratory tract infection

Question 11

From what does pseudomonas originate and what are its main symptoms?

Answer 11

Comes from water and soil

Pneumonia and UTI

Question 12

What is the main species of Gram negative anaerobic bacilli and what are its symptoms?

Answer 12

Bacteroides fragilis

Intra-abdominal abscess