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Which reaction definated VP test?
reaction of voges-proskauer test
Does Sarcina test positive or negative for the voges-proskauer test?
negative
What are results of Imvic test on staphylococci?
Staphylococcus epidermidis indole test - negative methyl red - negative voges proskauer test - positive citrate test - no idea
Which test would likely benefit most from longer incubation time methyl red or voges proskauer?
Incubation times for the voges proskauer test should be exactly 48 hours because lengths longer or shorter can skew results. However, methyl red may benefit from incubating longer than 48 hours.
What indicator is used to determine glucose or lactose in voges proskauer test?
Alpha napthol and a mixture of creatine with KOH
Bacillus cereus have a positive reaction for VP and citrate?
The B.cereus has a positive citrate test and a negative Voges Proskauer.
Two tests for reactions that produce acid end products?
Voges Proskauer and Cysteine Test. I think...
What test will differentiate between Klebsiella pneumonia and Citrobacter freundii?
K. oxytoca will be indole-positive while K. pneumonia is indole-negative
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.
Would a false negative result for the VP test more than likely be attributed ti poor sensitivity or to poor specificity of the test system?
False negatives in a voges-proskauer test would be due to poor sensitivity.
Which organisms does Voges-Proskauer test for?
VP + is typical for Enterobacter, while f.e. E. coli is VP-. It means that Enterobacter is able to ferment butanediol, while E. coli isn't
Why do you read a methyl red test immediately?
The methyl red test is read immediately because fermentation occurs within a short time to produce an acid. Conversely, because oxidation requires more time, the Voges-Proskauer test is read after about an hour.
