: Staphylococcus aureus DNA, Nasal Swab, Nucleic Acid Probe

: What This Test Detects

: The test looks for DNA specific to Staphylococcus aureus, including both antibiotic-susceptible and antibiotic-resistant strains depending on the assay used. Because it targets genetic material, it can identify the bacterium even when very few organisms are present. The sample is collected with a swab from the front part of the nostrils.

: Why Nasal Screening Is Done

: The nose is a common place where S. aureus lives harmlessly as part of the normal flora. Screening the nose is often done before certain surgeries or in healthcare settings to identify carriers, so that steps can be taken to reduce the risk of the bacteria causing a wound or bloodstream infection later. It may also be used as part of infection-control programs.

: How the Sample Is Collected

: A healthcare professional gently rotates a soft swab inside one or both nostrils. The swab is then sent to the laboratory, where a molecular method such as a nucleic acid probe or polymerase chain reaction (PCR) is used to look for S. aureus DNA. Collection is quick and generally not painful.

: Understanding Your Result

: A positive result indicates that S. aureus DNA was found in the nasal sample, meaning you are likely a carrier. A negative result means the DNA was not detected at the time of testing. Results are interpreted together with your medical history and the reason the test was ordered; your clinician will explain what they mean for your care.