Culture and sensitivity aerobic tracheostomy tube secretion is done on a sample of tracheostomy tube in order to measure the amount of Culture of the pathogenic organism that might be present in the tracheostomy tube secretion. It helps in the accurate assessment of any infections that might be there in your body and also gives a clear picture of its severity. The test is also conducted during the treatment in order to trace the progress of the medications and also after the treatment has been done, in order to confirm that the infection has been cured properly.