Persistent cough may be a symptom of viral infections, common cold, parasitic infections, asthma, bronchitis,, emphysema, fluid in lungs, enlarged adenoids, cystic fibrosis, tuberculosis, valley fever, croup, farmer's lung, histoplasmosis, pneumoconiosis, psittscosis, pulmonary embolism, round worms, sinus infection and tachycardia. To learn more about the cause of your symptoms, click on each of the diseases listed below.
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