Analysis

Technique

Sample Volume

Used environment

Incubation

Colonies

Aerobic revivable microorganisms

Total coliforms

Thermo-tolerant (faecal) Coliforms Escherichia coli

Incorporation

in solid media Filtration

Filtration

Filtration

1 ml

100 ml

100 ml

100 ml

23.5 g/L Plate Count Agar (PCA)

35.12 g/L Lactose agar-agar Tergitol with TTC

35.12 g/L Lactose agar-agar Tergitol with TTC

37.0 g/L Escherichia coli Broth + Agar 5%

37˚C or 22˚C/24 or 48 hours

37˚C /24 hours

44.5˚C/24 hours

44.5˚C /24 hours

Whitish

Orange yellow

Orange yellow

Whitish

Streptococci of Group D (Enterococci)

Salmonella &

Filtration

Filtration

100 ml

100 ml

46.5 g/L Agar-agar

Slanetz et Bartley

56.6 g/L Xylose

37˚C /24 hours

37˚C /24

Violet-rose

Red in the

Shigella

Lysine Deoxycholate

Agar—XLD

Hours

centre