Yellow, which means bacteria is able to produce acids from mannitol fermentation
E. faecalis typically does not ferment mannitol, so it does not grow well on mannitol salt agar (MSA) and would not test positive on this medium. MSA is selective for organisms that can ferment mannitol, such as Staphylococcus species.
Mannitol salt agar is selective for gram positive bacteria, and differential for mannitol fermenters. Phenol red is the indicator containing the enzyme mannitol.
A positive Molisch's test result indicates the presence of carbohydrates.
A positive result for dische diphenylamine test would be indicated by a deep blue color change in the solution. This color change indicates the presence of DNA, as dische diphenylamine reacts with deoxyribose sugars in DNA to produce a blue color.
Any food that has carbohydrate, protein, and fats can be shown positive for those food test. It is basically a chemical reaction that indicate the presence of food component by a specific color formation.
E. faecalis typically does not ferment mannitol, so it does not grow well on mannitol salt agar (MSA) and would not test positive on this medium. MSA is selective for organisms that can ferment mannitol, such as Staphylococcus species.
Mannitol salt agar is selective for gram positive bacteria, and differential for mannitol fermenters. Phenol red is the indicator containing the enzyme mannitol.
The positive color for the iodine test is a dark blue or black color. This color change indicates the presence of starch in the test substance.
A positive Molisch's test result indicates the presence of carbohydrates.
the color of a positive test results is bright green
A positive result for dische diphenylamine test would be indicated by a deep blue color change in the solution. This color change indicates the presence of DNA, as dische diphenylamine reacts with deoxyribose sugars in DNA to produce a blue color.
MacConkey agar is yellow (due to the lactose in the agar). When an organism consumes the lactose, the agar turns purple. Purple indicates a positive test. If the organism doesn't use the agar, the agar stays yellow.
Any food that has carbohydrate, protein, and fats can be shown positive for those food test. It is basically a chemical reaction that indicate the presence of food component by a specific color formation.
A positive test for protein typically appears as a violet or purple color when using chemical indicators such as Biuret reagent. This color change indicates the presence of proteins in the test sample.
The Presence-Absence (P-A) test is a presumptive detection for coliforms.
Yes. S. epidermidis is a bacterial species found commonly on the skin as a part of a human's natural bioflora. Sweating releases salt and causes the surface of our skin to be very salty, providing an environment in which many bacteria would normally perish. S. epidermidis, however, prefers such an environment and thus it is also able to grow regularly when cultured on Mannitol Salt Agar plates.
The IMViC test results that would indicate the presence of fecal coliforms are negative for indole production, positive for methyl red test, negative for Voges-Proskauer test, and positive for citrate utilization.