Coagulase Test- Principle, Procedure, Types, Interpretation and Examples. Coagulase test is used to differentiate Staphylococcus aureus (positive) which produce the enzyme coagulase, from S. epidermis and S. saprophyticus (negative) which do not produce coagulase.
Coagulase Test: Principle, Procedure, Results Slide Coagulase Test Slide coagulase test is done to detect “bound coagulase” or “clumping factor”. The clumping factor is a fibrinogen binding cell surface receptor present in the cell walls of most, but not all, S. aureus. The clumping factor acts directly on the fibrinogen in the plasma resulting in clumping. Slide coagulase test is ...
Coagulase Test- Objectives, Principle, Procedure, Types, Results, Uses. Staphylococcus aureus produces two forms of coagulase, bound and free.
The coagulase test has traditionally been used to differentiate Staphylococcus aureus from coagulase-negative staphylococci. S.aureus produces two forms of coagulase (i.e., bound coagulase and free coagulase). Bound coagulase, otherwise known as "clumping factor", can be detected by carrying out a slide coagulase test, and free coagulase can be detected using a tube coagulase test.
Distinguishing S. aureus from less pathogenic coagulase-negative staphylococci is important, as they are often considered contaminants or require different management. Therefore, the coagulase test serves as a foundational step in guiding appropriate antimicrobial treatment and infection control measures, directly impacting patient outcomes.
Coagulase exists in two forms: “bound coagulase” (or clumping factor) which is bound to the cell wall and “free coagulase” which is liberated by the cell wall. Bound coagulase is detected by the slide coagulase test, whereas both free and bound coagulase are detected by the tube coagulase test.
Introduction The coagulase test is a laboratory technique used to identify Staphylococcus aureus, a gram-positive bacterium that is commonly found on the skin and mucous membranes of humans and animals. The test is based on the detection of the enzyme coagulase produced by S. aureus, which can cause blood to clot.