TYPES OF CULTURE MEDIA

culture media substances

culture media substances

• liquid

• solid

• semi-solid

physical state

• liquid (broth)

• solid (agar)

• semi-solid

chemical composition

1. defined (synthetic)

2. complex (non-synthetic)

Function

1. General purpose

2. Enriched

3. Selective

4. Differential

used got growth of mircoorganisms

• Broth (liquid medium)

• Agar (solid medium)

Defined media

• Exact chemical composition

• Made from pure substances such as simple sugars ,vitamin, minerals in precise amounts

complex media

• exact chemical composition in not known

• contain materials (extracts/digests) derived from animals/plant/yeast

media composition

a list of ingredients which makes up the contexts of culture media

Enriched media

Supporting growth of a broad range of microbes, it contains specific nutrients to support the growth of the certain (fastidious) species of microbes.

Fastidious meaning

microorganisms which have very particular or complex growth requirements

Selective media

contain chemical agents that favour the growth of one type of microbe that inhibit the growth of another types of microbe

Differential nedia

Visible differences in their morphologies/biochemical

BPA (Baird Parker Agar)