Gram Stain

Question 1

Gram stain:

Positive:

What bacteria is cocci in pairs?

What bacteria is cocci in clusters?

What bacteria is in chains?

Answer 1

Strep pneumoniae

Staph aureus (MSSA & MRSA)

Enterococci
Streptococci (e.g. Group A strep)

Question 2

Gram stain:

Negative:

Cocci - 2 types?

Negative rods:

• E. coli
• Klebsiella
• Salmonella

What do rods look like?

Answer 2

Neisseria meningitidis
Neisseria Gonorrhoea

Rods - look like a rectangle