Enriched media :
* Addition of nutritionally rich ingredient like blood, serum or extract of plants or animal tissues, vitamins to the basic medium like nutrients agar, result in media called enriched media.
* The provide additional nutrients to the fastidious heterotrophs.
* Examples of enriched media are blood agar, egg ,media.
* Blood agar is used for cultivation of streptococcus pyogens, chocolate agar is suitable for Haemophilus influenza. Serum medium is suitable for coryenbacterium diphtheriae.