negative!
The Voges-Proskauer (VP) test detects the presence of acetoin, an intermediate product in the fermentation of glucose to 2,3-butanediol. In the VP test, a culture is first grown in a medium containing glucose and then reagents are added to detect the presence of acetoin. A positive VP test is indicated by a red color development after the addition of alpha-naphthol and KOH reagents.
Bacillus subtilis will typically produce an alkaline reaction in litmus milk, turning it pink or purple. This is due to the bacterium's ability to break down lactose and produce ammonia. Additionally, Bacillus subtilis may also cause coagulation of the milk proteins, resulting in a solid clot formation.
test
Bacteria that can live in oxygen are known as aerobic bacteria. Some examples include Escherichia coli, Bacillus subtilis, and Pseudomonas aeruginosa. These bacteria use oxygen for their metabolism and growth.
The name of the thiamine blood test is "Thiamine (Vitamin B1) Blood Test" or simply "Thiamine Blood Test."
The B.cereus has a positive citrate test and a negative Voges Proskauer.
bacillus megatarium test positive for sucrose where creus doesnt
Bacillus subtillus will test positive when performing a VP and Citrate test. Also, bacillus cereus is much more motile. It isn't as dependable as the chemical tests, but the cereus colonies will appear wispy and more widespread on an agar plate than those of subtilis.
Bacillus megaterium
yes it have positive reaction for ONPG test
Bacillus brevis typically shows beta-hemolysis on blood agar plates, where the red blood cells are completely lysed and a clear zone surrounds the colonies. This indicates that the bacterium produces hemolysins that lyse red blood cells.
Most bacteria in Tribe V are able to utilize Citrate, with the exception of Hafnia and Pantoea (+/-). The 2 most common Klebsiella (oxytoca and pneumoniae), can utilize citrate, so should be citrate positive.
Bacillus megaterium is catalase-positive, meaning it produces the enzyme catalase which breaks down hydrogen peroxide into water and oxygen. In a catalase test, if Bacillus megaterium is added to hydrogen peroxide, you would observe the formation of bubbles or effervescence due to the release of oxygen gas. This is a positive catalase test result for Bacillus megaterium.
Staph gives both MR and VP positive. MR is used to detect acid production and VP for alkaline or neutral products. Staph first converts into acidic products and has ability to convert those acidic products into some neutral/basic products side by side. Hence it gives both positive results.
blue/positive
The Voges-Proskauer (VP) test detects the presence of acetoin, an intermediate product in the fermentation of glucose to 2,3-butanediol. In the VP test, a culture is first grown in a medium containing glucose and then reagents are added to detect the presence of acetoin. A positive VP test is indicated by a red color development after the addition of alpha-naphthol and KOH reagents.
Bacillus cereus is positive for the urease test, meaning it can break down urea to produce ammonia and increase the pH of the media. This can be observed by a color change in the media from yellow to pink or magenta.