Question:medium
Microbial cause of catheter infection in a young female.
Microbial cause of catheter infection in a young female.
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Skin staphylococcus is the top catheter coloniser among the options.
Updated On: Jun 24, 2026
- S. aureus
- S. viridans
- P. mallei
- P. cepacia
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The Correct Option is A
Solution and Explanation
Step 1: Remember that catheter infections come from skin flora migrating along the device, then match to the options.
Step 2: The overall leader is coagulase-negative staphylococci, but that organism is absent from the choices. The next staphylococcal species in rank is Staphylococcus aureus, which causes roughly 5 to 10 percent of catheter-related infections and is the most frequent among the listed answers.
Step 3: Viridans streptococci, P. mallei and P. cepacia are uncommon in this context, so the best available answer is S. aureus.
\[\boxed{\text{S. aureus}}\]
Step 2: The overall leader is coagulase-negative staphylococci, but that organism is absent from the choices. The next staphylococcal species in rank is Staphylococcus aureus, which causes roughly 5 to 10 percent of catheter-related infections and is the most frequent among the listed answers.
Step 3: Viridans streptococci, P. mallei and P. cepacia are uncommon in this context, so the best available answer is S. aureus.
\[\boxed{\text{S. aureus}}\]
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