<prompt> The usual concentration of blood used for blood agar medium is: September 200410204080  <response>: Ans. A i.e. 10 Blood agar plate BAP Blood agar plate BAP contains mammalian blood usually sheep or horse, typically at a concentration of 5-10. BAP are enriched, differential media used to isolate fastidious organisms and detect haemolytic activity. Beta-hemolytic activity will show lysis and complete digestion of red blood cell contents surrounding colony. Examples include Streptococcus haemolyticus. Alpha-hemolysis will only paially lyse the cells are either lysed or not- it is the digestion that may be incomplete the hemoglobin and will appear green or brown due to the conversion hemoglobin to methemoglobin. An example of this would be Streptococcus viridans. Gamma-hemolysis or non-hemolytic is the term referring to a lack of hemolytic activity. Contains meat extract, tryptone, sodium chloride and agar. 