A patient is in the ICS and his blood culture shows gram positive bacteria which is catlase positive and coagulase negative. The most likely agent is
b. Staphylococcus epidermidis
c. Stereptococcus pyogenes
d. Enterpcpccus faecatis
Correct Ans B
Staphylococci are gram positive cocci. Based
on the coagulase test they can be classified as coagulase positive
–staphylococcus auresus and coagulase negative-staphylococcus saprophyticus and
epidermidis. Culture of staphylococcus aureus on Blood agar shows βnaemolytic
colories are seen on Nutrient agar. Staphylococcus aureus ferments mannitol
gives a positive urese test. Infection caused by staphylococcus aureus are
carbuncles, furuncles, folliculate, meningitis, UTI, pneumonia, osteo myelitis,
food poisoning , Toxicshock syndrome.
Methicillin resistant staphylococcus aureus strains can be acquired from the
hospital , same may also be acquired as community infections.
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