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Yellow, which means bacteria is able to produce acids from mannitol fermentation
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∙ 12y ago
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Does E. faecalis test positive for MSA agar test?
yes it will ferment the mannitol and cause yellow color change.
What reaction does the enzyme involved in Mannitol-salt agar test mediate?
Mannitol salt agar is selective for gram positive bacteria, and differential for mannitol fermenters. Phenol red is the indicator containing the enzyme mannitol.
What does a positive Molisch's test on an unknown substance indicate?
A positive Molisch's test result indicates the presence of carbohydrates.
Does escherichia coli give a negative result for citrate test?
No, it is present/positive. • Cocci* • Gram-Positive* • Non-motile* • No Capsules* • No Spores* • Facultative Aerobe* • No Glucose, Lactose*, Mannitol* Fermentation • No Urease*, Catalase*, Oxidase*, Ligase*, Protease* Production • Production of Indole*, tryptophonase*
What types of food would test positive result for carbohydrates proteins fats?
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.
Does E. faecalis test positive for MSA agar test?
yes it will ferment the mannitol and cause yellow color change.
What reaction does the enzyme involved in Mannitol-salt agar test mediate?
Mannitol salt agar is selective for gram positive bacteria, and differential for mannitol fermenters. Phenol red is the indicator containing the enzyme mannitol.
What color is positive test result for glucose?
the color of a positive test results is bright green
What does a positive Molisch's test on an unknown substance indicate?
A positive Molisch's test result indicates the presence of carbohydrates.
Does escherichia coli give a negative result for citrate test?
No, it is present/positive. • Cocci* • Gram-Positive* • Non-motile* • No Capsules* • No Spores* • Facultative Aerobe* • No Glucose, Lactose*, Mannitol* Fermentation • No Urease*, Catalase*, Oxidase*, Ligase*, Protease* Production • Production of Indole*, tryptophonase*
Lactose fermentation mac conkey test which color indicate a positive test?
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.
What types of food would test positive result for carbohydrates proteins fats?
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.
Does micrococcus roseus test positive for mixed acid fermentation?
Micrococcus roseus ferments sucrose, but no gas. Does not ferment lactose, glucose, or mannitol. Beta hemolitic. Catalase positive. Pink colonies of groth
What is the positive result for sakaguchi test?
A red color is the positive result>
What color is a positive test for protein?
A positive test, when using Biuret reagent, would be purple-ish
What does a positive presence-absence test indicate?
The Presence-Absence (P-A) test is a presumptive detection for coliforms.
Will tyrosine test positive in Hopkins-Cole test?
Yes, it is possible (color test).
