0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Give result lactose test for bacteria citrobacter diversus?
lactose fermenter
Does providencia bacteria ferment lactose?
No, it doesn't. After performing the Lactose fermentation test, the isolated colonies will turn yellow meaning that the test was negative.
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.
Does a fehling test show lactose being present?
yes
Why are some organisms positive in the ONPG Test but negative when tested for the ability to metabolize lactose?
ONPG is for the detection of delayed lactose fermentation.
How is lactose intolerance measured in children?
To identify lactose intolerance in children and adults, the hydrogen breath test is used to measure the amount of hydrogen in the breath.
Why is Benedict's test unreliable?
its because Benedict's test only gives a possible test for reducing sugars (all monosaccharides, maltose and lactose).
How would lactose react toward barford test?
Theoretically nothing is happend
Why cant the ONPG test be substituted for the determination of lactose fermentation?
ONPG test detects only presence of beta galactosidase enzyme whereas lactose fermentation requires the presence of permease as well as beta galactosidase enzyme.
Can shigella sonnei be a lactose non fermenter My tests are as followed TSI KA Methyl red VP - citrate - urea - NO3 degraded to NO2 H2S - motility -. all points to shigella but it's nonferm?
S.sonnei is not a true lactose fermenting bacteria (see.. http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=271578&blobtype=pdf)But is a delayed lactose fermenter as it does not have the enzyme permease to transport lactose through its cell wall.However an ONPG lactose fermenting test does not require permease to allow the bacterium to ferment lactose so in an ONPG test the shigella sonnei will appear as lactose fermenting positive.Hope this helps!!2nd year BMS student
Does Enterobacter aerogenes produce gas in the Kligler Iron Agar test?
Yes. Enterobacter aerogenes ferments lactose and glucose as well as producing gas. It does not produce H2S. Occasionally the slant may revert to an alkaline reaction even though lactose has been fermented. Another lactose test should be formed, such as the reaction on MacConkey agar
Is there lactose intolerance in neonates?
Lactose intolerance is diagnosed by a test of the baby's stools (poo) and a blood test. Signs that a baby may be lactose intolerant are the baby's stools are frothy and green in colour, the baby may pull their knees up to their tummy and be irritable and unsettled, or if the baby is breastfed the baby may be constantly on and off the breast but not gaining weight.
