Imipenem Minimum Inhibitory Concentration (MIC) by Broth Microdilution

What This Test Measures

The test evaluates the concentration of imipenem required to inhibit bacterial growth. Imipenem is a beta-lactam antibiotic used to treat serious infections, including those caused by certain bacteria like *Pseudomonas* or *Enterobacteriaceae*. The result helps doctors decide the appropriate dosage and duration of treatment.

Why It Matters in Treatment

Your doctor may order this test if you have a bacterial infection resistant to other antibiotics or if imipenem is part of your treatment plan. The MIC result ensures the antibiotic is strong enough to kill the bacteria without causing excessive resistance or harm to you.

Sample and Testing Process

A small sample of your blood, urine, or other bodily fluid is collected and tested in a lab. The sample is exposed to imipenem at increasing concentrations to see at what level bacteria stop growing. This process is called broth microdilution and is considered the gold standard for measuring antibiotic effectiveness.

What to Expect Before or After Testing

No special preparation is needed unless instructed by your healthcare provider. Results may take several days to arrive, depending on lab workload. Follow-up testing may be needed if the initial results suggest resistance or if your infection persists.