ococcus is the most likely genus as these are commonly found in dairy products and are mainly non-pathogenic, although some strains may be opportunistic pathogens. This is an obligate aerobe and most cells are spherical and usually appear in pairs. Glucose can be metabolized with acid production but without gas (Cullimore, 2000).
For this study one drop of probiotic drink supplement from each sample was taken with a sterile bacterial loop and was placed on an individual, clean microscope slide. Gram staining should be carried out using light smears of young, active cultures, if older cultures are used Gram-positive bacteria may stain red-pink due to autolytic changes in the cell wall and therefore appear gram-negative. Some ghost like long rods in the Danone sample stained red-pink. The bacteria resembled other long gram-positive rods present in the sample, it is therefore likely that they were gram-positive rods but were not staining blue-purple due to the age of the ba
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