If your product is very clean, you can start with two ingredients.
10 ml 1: 10 diluent was added to the double lactose bile salt fermentation tube.
Add 1ml 1: 10 diluent into the single lactose bile salt fermentation tube.
Add 1: 100: 100 diluent into the single lactose bile salt fermentation tube.
And according to your dilution (2. 1.2), the final result is 2700MPN/ 100g instead of 27MPN/ 100g.
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