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While working as a medical microbiologist in a hosptial, you are given a blood s

ID: 137265 • Letter: W

Question

While working as a medical microbiologist in a hosptial, you are given a blood sample for analysis from a patient suspected of bacteremia. You find the presence of Gram-positive cocci in the blood sample. Further investigation reveals the bacteria to be catalase-positive and coagulase-positive. This indicates that the bacteremia is likley due to

Streptococcus pyogenes.

Staphylococcus aureus.

Staphylococcus epidermidis.

Listeria monocytogenes.

Enterococcus faecalis.

Streptococcus pyogenes.

Staphylococcus aureus.

Staphylococcus epidermidis.

Listeria monocytogenes.

Enterococcus faecalis.

Explanation / Answer

Staphylococcus aureus is gram positive catalase and coagulase positive bacteria

S. aureus is catalase positive  it can produce the enzyme catalase, Catalase convert H2O2 to water and oxygen.