Microbiology Flashcards
What is the general media for bacteria
TSA (Trypticase soy agar)
TSA is a growth media for the culturing of moderately to non fastidious bacteria. It is a general-purpose, non-selective media providing enough nutrients to allow for a wide variety of microorganisms to grow.
What is the media for yeasts and moulds
SDA (Sabouraud Dextrose Agar)
SDA is a selective medium primarily used for skin yeasts and moulds. The acidic pH of this medium (pH about 5.0) inhibits the growth of bacteria but permits the growth of yeasts and most filamentous fungi.
What is the media for water bacteria?
R2A (Reasoner’s 2A agar)
R2A agar is a culture medium[1] developed to study bacteria which normally inhabit potable water.[2] These bacteria tend to be slow-growing species and would quickly be suppressed by faster-growing species on a richer culture medium
What is the media for E. coli?
MacConkey
What is the media for P. aeruginosa
Cetrimide
What are the media for sterility test
Fluid Thioglycollate Medium (FTM) and
Soyabean Casein Digest Medium (SCDM).
What is FTM used for and at what temp incubated?
anaerobic and aerobic bacteria - store at 30-35 °C
What is SCDM used for and at what temp incubated?
fungi and aerobic– store at 20-25 °C
What is the sample size used for a sterility test?
Number of samples changes dependent on batch size and product type.
For normal parenteral batches >500 then 20 containers or 2% whichever is less
What are the two methods available for sterility test?
Test methods = Membrane Filtration Method and Direct Inoculation
What do you need to do when developing the sterility test for a product
Need to demonstrate no anti-microbial action of the product on the sterility test. Inoculate with less than 100cfu, do the test and leave for 14 days to see turbidity.
What do you need to do to each batch of medium for sterility test
1) Demonstrate it’s sterile
2) Demonstrate it grows bacteria and yeast and moulds
3) Staph, Bacillus, pseudomonus, Clostridium sporogenes (anaerobic), candida and aspergillus
What are used to positively show sterility media grows bugs?
Staphylococcus , Bacillus, pseudomonus, Clostridium sporogenes (anaerobic), candica and aspergillus
SBPACC
What are methods to sanitise a purified water system?
Ozone
Heat
Chemical – peracetic acid and hydrogen peroxide