
Nutrient Agar
Culture Media
Information
Nutrient agar is a basic medium and commonly used for cultivation, enrichment, enumeration, prolonged
maintenance and storage of wide variety of microbes. The nutrient agar is widely used as non-selective
microbial medium for routine microbiology analysis. Nutrient agar is prominently used for cultivation of
the non-fastidious organisms. Nutrient agar is ideal microbial media for the teaching, demonstration and
routine analysis. Nutrient Agar is a simple medium composed of the peptone, meat extract (equivalent to
beef extract), yeast extract which provide ample amount of the carbon and nitrogen essential and non
essential amino acids, along with the vitamins and trace minerals. Sodium chloride maintains the osmotic
equilibrium of the medium. Agar is solidifying agent.
Use: Recommended for the refinement of non-fastidious microorganisms from clinical and non-clinical
samples. It is generally used for examination of water and dairy products.
Contents*
Ingredients
Peptone
Meat extract #
Yeast extract
Sodium chloride
Agar
pH at 25˚C
Gram/Liter
5.0
1.5
1.5
5.0
15.0
7.4±0.2
* Formula adjusted for optimum performance and parameters
# Equivalent to Beef Extract
Directions: Dissolve 28.00 grams in 1000 ml distilled water. Boil to dissolve the medium completely and
sterilize by autoclaving at 15 lbs pressure (121°C) for 15 min, cool it to 42-45 °C and distribute aseptically
in desired. Ensure complete solidification and inoculate test sample aseptically.