People with takahara's disease don't produce catalase. although often asymptomatic, this condition can lead to recurrent oral infections by peroxide-generating bacteria. how could you diagnose a catalase deficiency using information from this exercise ?

Catalase is commonly known as a enzyme which can be found in all living creatures.

Catalase has a specific property in regulating a living body, so it takes charge for hydrogen peroxide it has decomposed or not.  And after the decomposition process hydrogen peroxide separates and gives us hydrogen and water.

Now if checkup is made to maintain the condition of catalase there is a test conducted in which hydrogen peroxide is added into blood.

So if the blood turns into foamy dark brownish color than there is a deficiency of catalase.