Which of the following will give a positive result for a coagulase test?
A. S. epidermidis
B. S. saprophyticus
C. S. aureus
D. S. hominis
Answer (2)
Staphylococcus aureus is the only one among the options listed that will give a positive result in a coagulase test, while the others, such as Staphylococcus epidermidis and Staphylococcus saprophyticus , are negative. The coagulase test identifies the enzyme produced by certain bacteria, which allows them to clot plasma. Therefore, only Staphylococcus aureus is coagulase-positive. ;
The only option that gives a positive result in a coagulase test is S. aureus (option C). Other species like S. epidermidis , S. saprophyticus , and S. hominis are coagulase-negative. Thus, S. aureus is crucial for identifying certain bacterial infections.
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