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Oxidase Test: Principle, Procedure, Results, and Applications Introduction to Oxidase Test The Oxidase Test is a fundamental biochemical test used in microbiology to identify bacteria that produce the enzyme cytochrome c oxidase. This enzyme plays a key role in the electron transport chain, which is essential for aerobic respiration. The oxidase test is widely used in clinical, environmental, and food microbiology laboratories to differentiate between bacterial species, especially Gram-negative …