Lung abscess results from microbial infection causing necrosis of the lung parenchyma leading to one or more cavities. Lung abscesses usually occur in individuals who have a predisposition to aspiration, immunocompromised individuals, patients with long standing illnesses like malignancies, diabetes, chronic lung diseases. Both gram positive and gram negative pathogens are involved in the pathogenesis. Rising incidence of resistant pathogens has added to the burden of treating physicians. Garenoxacin a newer desfluoroquinolone with its broad spectrum of coverage appears to be a suitable fluoroquinolone for the treatment of respiratory tract infections. The case study mentioned below is of pulmonary emphysema with the existing lung cyst going in for secondary infection. The study looks to explain the utility of fluoroquinolones in the treatment of such infections.