A dry cough
persisting for 2 months has several causes and a normal CXR does not exclude pulmonary pathologies completely. CXR is not a sensitive test and HRCT is suggested if there has been any past exposure to TB. Also the QuantiFERON or TB-SPOT blood test
can help us know if there is a suggestion of latent TB
All these tests if normal, along with sputum smears or c/s (6 weeks), require exclusion of allergies and house dust mite allergy
is high on the cards.
are not the answer and have long term complications, therefore an allergy test to exclude common allergies is important.
Long acting antihistamines along with nasal sprays is the first line.
offers long term benefit.