Which biochemical test does Listeria monocytogenes produce a positive result in?

Listeria monocytogenes is known for its characteristic biochemical properties, one of which is its ability to produce the enzyme catalase. The catalase test evaluates whether an organism can break down hydrogen peroxide into water and oxygen, indicating the presence of the enzyme catalase. A positive result in this test for Listeria monocytogenes demonstrates its ability to survive in environments where hydrogen peroxide may be present, such as within the immune response of the host.

The organism does not produce a positive coagulase test, as this test is generally used to identify Staphylococcus aureus. Additionally, Listeria monocytogenes is typically negative for lactose fermentation, as it cannot ferment lactose in a significant way compared to other bacteria that do. Therefore, a positive result in the catalase test is fundamentally significant for identifying Listeria monocytogenes in a laboratory setting.