Types of culture media Flashcards
Culture
Are growth of microorganism on a culture medium
Is a liquid, semi-solid, or solid medium utilized to observe growth patterns of microorganism as well as for transport and storage
Culture medium
Types of culture (3)
Pure
Mixed
Stock
Pure culture
Composed only one specie
Mixed culture
Composed of more than one specie
Composed of several species contained in a separate culture medium
Should be grown in large volume of broth
Used for academic and industrial purposes
Stock culture
Classification of culture medium according to consistency (3)
-Liquid medium
-Semi-solid medium
-Solid medium
Contains 0% agar
Allows growth of aerobes, anaerobes and facultative anaerobes
Liquid medium
3 Examples of liquid medium
-Brain heart infusion
-Trypticase Soy Broth
-Thioglycollate
Semi-solid medium
Contains 0.5-1% agar
Example of semi-solid medium
Sulfide Indole Motility
Solid medium
Contains 2-3% agar
4 Examples of solid medium
-Triple Sugar Iron (TSI) agar
-Mac Conkey
-Blood Agar Plate
-Chocolate Agar Plate
Is a sulfated polymer containing D-galactose, D-glucuronic acid; derived from red algae
Agar
Agar will melt if the temperature reaches
80-90
Agar will solidify if the temperature reaches
40-50
Cooling temperature for distribution of agar into Petri dish
55-60
Classification of culture medium according to composition (3)
-Synthetic/defined Medium
-Non-synthetic/complex medium
-Tissue Culture Medium
Medium where all components are known to the user
Used for research purposes
Synthetic/Defined medium
Non-synthetic/Complex medium
-Composed of some unknown substances
-Useful for isolation of bacteria
3 Examples of non-synthetic medium
-Nutrient Broth (NB)
-Trypticase Soy Broth (TSB)
-Mac Conkey agar
Used for obligate intracellular bacteria (Rickettsia & Chlamydia)
Tissue culture medium
Classification of culture medium according to how the medium is dispensed/distributed (2)
-Plated medium
-Tube medium
Tube medium (4
Liquid
Butt
Buttslant
Slant
Classification of culture medium according to use (6)
-Simple Media/General Purpose —Media/Supportive Media
-Enrichment media
-Enriched media
-Differential media
-Selective media
Special media
Routinely used in the lab and w/o added supplement
Media that support the growth of most nonfastidious bateria
-Simple Media/General Purpose -Media/Supportive Media
Composition of Simple Media/General Purpose Media/Supportive Media
Meat & soybean extracts
2 Examples of Simple Media/General Purpose Media/Supportive Media
-Nutrient agar (NA) and broth (NB)
-Trypticase Soy Broth
Used to propagate growth of certain group of bacteria from a mixture of organisms
Contains specific type of nutrients
Liquid-type media
Enrichment media
Media with added supplements necessary for the growth of fastidious organisms
Solid-type media
Enriched/non-selective media
Standard nonselective medium
Blood Agar Plate (BAP)
Is with horse blood; used for isolation of hemophilus
Chocolate Agar Plate (CAP)