Which diagnostic test is commonly used for pulmonary infections?

The sputum culture is a commonly used diagnostic test for pulmonary infections because it allows healthcare providers to analyze samples of mucus that are coughed up from the lungs. This test helps identify the specific pathogens responsible for the infection, such as bacteria or fungi. Once the pathogen is identified, appropriate antimicrobial therapy can be initiated, tailored to the specific organism.

In cases of pneumonia or bronchitis, for instance, collecting sputum and culturing it not only confirms the presence of an infection but also provides critical insights into the sensitivity of the pathogen to various antibiotics, guiding effective treatment. This process can be essential in managing both acute and chronic pulmonary infections effectively.

Other diagnostic methods listed, while they have their own roles in respiratory care, do not primarily serve this purpose. A CT scan is more often used for imaging and assessing structural changes in the lungs rather than identifying specific infections. An electrocardiogram focuses on heart function and does not provide information about the lungs or respiratory infections. Similarly, skin tests are primarily used for assessing allergic reactions or tuberculosis exposure, rather than directly diagnosing active pulmonary infections.