Preparation of medium

Medium Preparation method Usage Culture temperature / time

Desoxycholate agar medium
  1. 1)For 200 ml of purified water
    →9g of medium is heated and melted
  2. 2)Dispense into a petri dish. (Do not sterilize!)
    Medium storage is not possible.
Selective isolation of coliformsBacterial count calculation 35℃ / 24 hour

BGLB bouillon medium
  1. 1)For 200 ml of purified water
    →8g of medium is heated and melted
  2. 2)Put a Durham tube (6 x 30) in a medium test tube (Φ18.0 x 180) and dispense the dissolved BGLB medium. Cover with a Molton stopper, sterilize with steam at 121 ° C for 15 minutes, Then cool medium and then cool rapidly.
Coliforms estimation test
Bacterial cell calculation(for nutrient-rich samples)
37℃ / 24-48 hour

EC Bouillon Medium
  1. 1) For 200 ml of purified water
    →Dissolve 7.4g of medium.
  2. 2)Prepare in the same way as the above BGLB medium.
Detection of E.coli and coliforms (estimated test) 37℃ or 45.5℃ / 48 hour

Lactose bouillon medium (BTB added)
  1. 1) For 200 ml of purified water
    →Dissolve 2.6g of medium.
  2. 2)Prepare in the same way as the above BGLB medium.
Coliforms / E. coli estimation test and complete test 37℃ / 24-48 hour

EMB agar medium
  1. 1)For 200 ml of purified water
    →Dissolve 7.2g of medium.
  2. 2)Sterilize with high pressure steam at 121 ° C for 15 minutes and dispense into a petri dish.
Sorting of pathogenic gut flora
Appraisal separation
37℃ / 24 hour