Hi and thanks for the query, Persistent cough certainly deserves the attention of a doctor. Depending on the clinical state, presence of absence of fever, chest pain , past medical history, diagnostic possibilities could be suggested. Not all persistent cough deserve use of anti biotics. A chest X ray, a complete blood count and a complete clinical review with a detailed family and medical history should be enough to guide us in getting a proper diagnosis. Clinical conditions like TB, Pneumonias form other bacteria, asthma and other pulmonary diseases are very probable possibilities. I suggest you consult your doctor. Thanks and kind regards. Bain LE, MD.