Thank you Annie.  dee

On 27 Jul 2009, at 19:27, Annie B Smythe wrote:

Blood Agar is one of several common growth media to cultivate organisms in labs, generally red in color. It can be bought preplated, or the lab can make it. Generally labs buy it preplated to save time.The organisms are applied to the surface of the growth medium in the plate and then placed in an incubator...

It depends on the organisms you want to cultivate as to which media is used, and whether it's aerobic or anaerobic. Some organisms like blood agar, and some like other types of media.

Annie