We are currently launching two new products in the fermented milk category, one being an ambient drinking yogurt made from reconstituted milk. I am doing basic microbial tests on the products, but I am unsure as to which water I should be using for my dilutions.
I am testing for Total aerobic Microorganisms, Yeasts and Moulds, Enterobacteriaceae and Bacillus cereus.
Is it a must to use Buffered Peptone water for my serial dilutions? What solution would be the best for these tests?
I will appreciate your advice! Thank you :)