Which statement about sputum specimen collection is true?

• A. Sputum specimen must be saliva-free and test requires training
• B. Used only for diagnosing pneumonia
• C. Saliva acceptable for the test
• D. Test performed by any staff without training

Answer: (A)

Obtaining a meaningful sputum specimen hinges on collecting material from the lower respiratory tract rather than saliva, and the collection technique must be performed by someone who is trained. Saliva contamination can skew results and make interpretation unreliable, so the specimen needs to be saliva-free. Proper training ensures the collector can supervise the patient as they perform a deep cough, use a sterile container, and handle and label the specimen correctly, which improves sample quality and reduces contamination or handling errors. While sputum testing can aid in diagnosing various lower respiratory infections, it isn’t limited to pneumonia, and saliva is not acceptable for this test. Clean, accurate collection cannot be achieved by untrained staff.