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Microbiology > Haemolysis > Flashcards

Haemolysis Flashcards

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Biology 101 flashcards
1
Q

Define haemolysis

A

The ability of bacteria to break down RBCs in agar by bacteria (requires haemolysin)

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2
Q

How does alpha haemolysis appear

A

GREEN

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3
Q

Which strains of bacteria are alpha haemolytic?

A

Streptococcus pneumoniae, oral streptococci, Streptococcus viridans (IE)

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4
Q

How does beta haemolysis appear

A

Clear and colourless. The bacteria undergo complete lysis.

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5
Q

Which strains of bacteria are beta haemolytic?

A

Streptococci pyogenes, Streptococci agalactiae, Staph aureus

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6
Q

How are beta haemolytic further classified?

A

Lancefield grouping

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7
Q

What conditions tend to be caused by Lancefield group A, C and G?

A

Tonsilitis and skin infections

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8
Q

What conditions tend to be caused by Lancefield group B?

A

Neonatal sepsis and meningitis

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9
Q

What condition tends to be caused by Lancefield group D?

A

UTI

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Microbiology (4 decks)

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