whay was a blood agar used rather than a nutrient agar for the cultures from the mouth?

Running head: BLOOD AGAR vs. NUTRIENT AGAR
Running Head: Blood Agar vs. Nutrient Agar


In fact, Blood agar can be considered approximately identical to Nutrient agar but, it
consists of 5- 10% blood of sheep, rabbit, or horse. (Golberg and Washington, 1976) It is used
via mainly microbiologists for the purpose of identification and isolation of particular pathogenic
bacteria as it can serve as differential medium. (Ellner et al. 1966) (Petts, 1984)
For instance; if we need to grow Streptococcus pyrogens which is claimed to cause strep
throat disease then, we may implement nutrient agar also but, it would make the...