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An organism can not test positive for both an MR test and a V - P test. The MR test is an abbreviation for Methyl Red and it tests for E coli The V - P is an abbreviation for Vogue Proskauer and it tests for enterobacter and klebsiella.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoYes there are four different possible results of the MR-VP test. An organism can be both positive, both negative or mixed.
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Why do nitrogen and oxygen form negative ions but no positive ions in simple binary compounds?
it is easier for them to have an octet of electrons(8e) Each ion will: obtain the noble gas structure each atom has high ionization energy Mr. Ehab
Who is mr Fahrenheit?
Freddie Mercury
How many moles are in 1200 grams of ammonia?
mol = mass/ Mr Mr = 14 + 3 = 17 mol = 1200/17 moles = 70.59
Why is the sky brighter inside a rainbow?
ask mr green
When interviewed Mr Harrison was discussing barometric pressure and the low pressure system moving in that may cause a change in precipitation and wind gusts Mr Harrison is most likely?
a meteorologist
Organism which is citrate positive indole negative MR negative VP negative sorbitol negative?
Klebsiella sp.
What does a positive Voges-Proskauer test mean?
It means that the bacterial organism uses the butylene glycol pathway; producing acetoin (acetylmethylcarbinol). This specific compound is produced only by bacteria that utilize this pathway. Usually (but not always) a positive Voges-Proskauer (VP) test indicates the organism is negative for the methyl red (MR) test. Both the MR and VP tests are usually done using the same culture; after dividing it into two equal volumes.
Could an organism be a fermenter and also be both MR and V-P negative?
Yes it can but I just don't know the reasons behind. My microbiology teacher told us but I forgot what she said.
Organism which is indole negative mr positive vp negative citrate positive?
Sounds like Citrobacter freundii. Double check that you do have a gram negative rod that is motile, H2S negative and oxidative negative (most gram neg rods are).
Could and organism be both MR and V-P positive?
yes an organism can be MR & VP positive both. for example staphylococcus. __________________________________________________________________ M-R (Methly Red) is a test used primarily to identify gram-negative rods. M-R is a pH indicator that changes when the pH is below 4.5. The indicator will turn red below 4.5 and yellow, in a pH above that point. V-P (Voges-Proskauer) is a specific test for metabolic intermediates when sugars ferment to produce butylene glycol. This does occur is some gram negative rods. A positive V-P test is almost never observed with a positive M-R test. The M-R test is based on the production of sufficient acid to lower the pH to below 4.5. If some of the sugar being fermented is being used to make butylene glycol, then it cannot be used to also produce acids.
Aerobic Bacteria that is citrate positive VP negative and MR positive?
Bacillus megaterium
Why Mr. Craven decides to see Mary?
Mr. Craven decides to see Mary because he is intrigued by the positive changes he sees in her since she arrived at Misselthwaite Manor. He is curious about her influence on Colin and wants to understand what has caused this transformation in both children.
Is miss a lesbian?
yes she got off with mr badat and they both used strapons so they could have lesbian sex
Which of the Jonas brother is nicknamed Mr positive?
Kevin Jonas
What is the similarity between eagles and vultures?
In no way that mr blobby could imagine
What is the plural for Mr?
It would usually be Mr. ____ and ____, assuming they are both men.
Who is the grandmaster in mi high?
i think it might be mr flatley the head teacher who could be the grand master cos they both have grey hairXD
