Abnormal morphology of Klebsiella pneumoniae in Respiratory Samples: A microscopic observation

Klebsiella pneumoniae is one of the most common causative pathogen for respiratory infections, meningitis, urinary tract infections, enteritis and septicemia. Aberrant forms of this bacteria and some other gram negative bacteria like Escherichia coli etc. have been reported mostly in samples of patients on antibiotics. Here, we report 2 patients with respiratory illnesses, with prior antibiotic exposure history showing filamentous structures with central enlargement and capsular halo on gram stain and Klebsiella pneumoniae was grown in cultures of both respiratory specimens.