Blood Agar (Sheep Blood 7%) is a medium for the cultivation and detection of haemolytic activity of streptococci and other fastidious microorganisms formulated according to the ISO 10560.
Proteose Peptone, liver digest and yeast extract provide essential carbon, nitrogen, vitamin and amino acid sources. Sodium chloride maintains the osmotic balance of the medium. Agar is the solidifying agent. The presence of blood provides further growth factors for fastidious microorganisms and allows to demonstrate the haemolytic reactions.