What are the results of Klebseilla pneumoniae after starch h

What are the results of Klebseilla pneumoniae after starch hydrolysis, casein hydrolysis, and catalase test? Thank you!

Solution

Answer:

(The results of the tests performed on Klebsiella pneumoniae varies with the strains/subspecies)

Catalase: Positive

Used to test for the presence of enzyme catalase: Hydrogen peroxide (H₂O₂) is formed as an end product of the aerobic breakdown of sugars. When H₂O₂ accumulates, it becomes toxic to the organism. Catalase decomposes H₂O₂ and enables the organism to survive. Only obligate anaerobes lack this enzyme.

Starch: Negative

Used to determine the ability of an organism to hydrolyze starch. The enzyme amylase breaks starch down into components more easily metabolized by the organism.

Casein hydrolysis: Negative

Used to determine the ability of an organism to produce the enzyme caseinase, which hydrolyzes casein in milk to more soluble products.