Post Page [Top]

Laboratory diagnosismicrobiology

MacConkey's Medium - Composition and bacteria cultured




MacConkey's medium image reload

MacConkey's Medium:

Composition:
1. Nutrient agar
2. Bile salt (sodium taurocholate)
3. Lactose
4. Neutral red (indicator)

Container:
Petri dish

Colour:
Transparent, reddish-brown or pink colour

Consistency:
Solid medium.

Micro-organism cultured?

It is used for:
1. growth and isolation of bacteria of family Enterobacteriaceae and to differentiate between lactose fermenters, non-lactose fermenters and late lactose fermenters.

Lactose Fermenters: form pink colonies, for example; E. coli, Klebsiella species, Enterobacter species
Non-lactose fermenters: from colorless colonies, for example, shigella species except shigella sonnie, salmonella species, proteus species and pseudomanas species.
Late lactose fermenters: form pink colonies after 2-3 days of inoculation. for example, Vibrio cholera, Serratia, Citrobacter, Shigella sonnei.

Important Culture Media:


2 comments:

  1. This post is very good. Its easily read and understood. Thanks.

    ReplyDelete
    Replies
    1. Thank you for appreciation. Kindly like us on facebook or follow on twitter for future posts

      Delete

Post Your Reply and Give Your Opinion About the Post

Bottom Ad [Post Page]