As a quality control officer in Company A, you are challenged with sporadic contamination of your pineapple juice product. Initial plating of the juice showed two (2) mixed colony morphologies on general purpose media. With the knowledge that fruit juice products are typically contaminated with yeast and bacteria, describe the methods you will use to isolate and differentiate the microbial contaminants in your pineapple juice.
What will be an ideal response?
Answer: 2 the mixed colonies can be grown on the differential and selective media depending upon the morphology observed in the general media. The differential and selective media will allow specific microbes to grow and not all the species. It will help in distinguishing between the mixed colonies. Various test like catalase can be performed to eliminate some options just before the use of the differential and selective media.
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