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The catalase test facilitates the detection of the enzyme catalase in bacteria. It is essential for differentiating catalase-positive Micrococcaceae from catalase-negative Streptococcaceae.
Explain how testing for catalase is useful for characterizing and identifying bacterial species. Tell the types of bacterial species that typically produce catalase and those that typically do not produce catalase. Successfully conduct a catalase test. Interpret results for a catalase test.
CATALASE TEST. Principle and Purpose. As a result of metabolic respiratory activities that reduce oxygen (O2), some bacteria will generate powerful oxidizing agents, e.g., hydrogen peroxide (H2O2) and superoxide ion (O2 -) that are capable of rapid damage to or destruction of cellular constituents.
catalase test: Catalases are enzymes that convert hydrogen peroxide (H2O2) into water and oxygen gas. When a drop of peroxide is placed on catalase-producing bacteria, bubbles appear when the oxygen gas is formed.
Catalase is made by your own cells, as well as a variety of other cells, including many bacteria. This test is particularly important for the gram + bacteria. For example, the genus Staphylococcus is a + catalase reaction, whereas the genus Streptococcus is a – catalase reaction.
Follow oral and written instructions and manage time in the lab efficiently. Apply correct terminology regarding microbiological techniques, instruments, microbial growth, and biochemical testing when making observations. Make accurate observations and appropriate interpretations of biochemical test results and use them in the identification of ...
11 lis 2010 · Catalase neutralizes the bactericidal effects of hydrogen peroxide and its concentration in bacteria has been correlated with pathogenicity. The catalase test facilitates the detection of this enzyme in bacteria. It is essential for differentiating catalase-positive Micrococcaceae from catalase-negative Streptococcaceae. While it is primarily ...
