12th June 2024

A man was brought into the acute medical unit with a history of multiple abscesses on his neck

A man was brought into the acute medical unit with a history of multiple abscesses on his neck, chest wall and left leg. He has a history of IV drug use and had multiple admissions in the last year due to alcohol intoxication. Blood cultures were taken in the emergency department and he was started on IV flucloxacillin. His initial gram stain showed that he had gram positive cocci in clusters. The microbiology registrar has called you and told you the following sensitivities.

Ampicillin Resistant

Co-amoxiclav Resistant

Cefoxitin Resistant

Doxycycline Sensitive

Vancomycin Sensitive

Your consultant has asked you to switch him to IV vancomycin

Which of the following antibiotics is used as a marker for MRSA detection?

Select the SINGLE most appropriate option from the list below. Select ONE option only.