Chronic obstructive pulmonary disease(COPD)is a slowly progressive chronic disorder.It is the fourth leading cause of death worldwide.Some patients experience acute exacerbations due to various aetiologies of which about 40-60% are bacterial in origin.Production of beta lactamases and extended spectrum of beta lactamase enzymes by bacteria lead to treatment failure and it is a great economic burden to the patient and the health care system. The work undertaken was able to enumerate the causative bacterial pathogens in acute exacerbations of COPD, their antibiotic sensitivity patterns and...