Culture and Sensitivity Anaerobic test is performed on a sample of tracheal trap swab to measure the level of Culture of the pathogenic organism in the tracheal trap swab. It is performed to confirm Tracheal Infection. In some cases, you can get infections in your airway (trachea). To test this, some mucus is taken from your trachea to test for infection. The laboratory professionals will look for germs in the mucus (called a culture). If germs are found, the lab tells your doctor, and the doctor will order medicine to kill the germs by prescribing antibiotics.