Standardized microbial challenge cocktail? (Candida, A. Brasiliensis, E. coli, P. Aeruginosa, Staph)
You can buy microbial growth testing kits, but where do you get standardized microbial challenge "cocktails"? To do a typical screening test. Using those included in USP 51 testing would make most sense?
"USP <51>" refers to General Chapter 51 of the United States Pharmacopeia (USP). Chapter 51 describes in detail the USP method for preservative efficacy testing, sometimes called "preservative challenge testing."
- Candida albicans (a yeast...yeasts are a form of fungus)
- Aspergillus brasiliensis (a filamentous mold...also a fungus)
- Escherichia coli (a bacterium...better known as "E. coli")
- Pseudomonas aeruginosa (a bacterium....very problematic industrially)
- Staphylococcus aureus (a bacterium...better known as "Staph")
Having a cocktail such as this would be very useful for initial screening of your formulas, before you send the best candidates of to e.g. USP51 testing which can be expensive.