Methicillin-Resistant *Staphylococcus aureus* (MRSA) Culture with Qualitative Identification

What This Test Measures

MRSA Culture identifies whether *Staphylococcus aureus* bacteria are resistant to methicillin and produce the penicillin-binding protein 2a (PBP2a). This is done by growing the bacteria in a lab setting and testing for specific genetic markers or antibiotic resistance patterns. The result is qualitative—meaning it only tells you if MRSA is present or not, not the exact amount.

How the Test Works

A sample (often from a wound, sputum, or other bodily fluid) is collected and sent to a lab. Bacteria are grown on special culture media over several days. If MRSA is present, it will grow and can be confirmed through additional tests like antibiotic susceptibility or PCR for the mecA gene.

Why It’s Done

MRSA cultures are typically ordered if you have signs of infection (like redness, swelling, or fever) and a healthcare provider suspects MRSA. This test helps prevent the spread of MRSA by ensuring proper treatment with antibiotics that target the bacteria.

Preparation and Sample Collection

No special preparation is needed for this test. A healthcare provider will collect a sample (e.g., swab, fluid, or tissue) from the affected area. The sample is then sent to a lab for culture and identification.