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Laboratory diagnosismicrobiology

Blood Agar - Composition and bacteria cultured - Important Cultural Media

Blood Agar:

1. Sterile defibrinated blood 5-10 %
2. Melted agar
3. Beef extract
4. Peptone water
5. NaCl

Petri dish

Opaque red.

Solid medium.

Micro-organism Cultured.
This media is used to determine the haemolytic properties of bacteria.

1. Complete (beta) hemolytic bacteria:- Streptococcus pyogenes,
2. Incomplete (alpha) hemolytic bacteria:- Streptococcus viridans, Streptococcus pneumoniae
3. No (gamma) hemolysis:- Staphylococcus Albus, staphylococcus citrus, Staphylococcus epidermidis, etc.

Important Culture Media:

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