Background: Patients with pulmonary infiltrates who are admitted in a hospital but do not respond to initial antimicrobial therapy pose a challenge to the attending physician. With increasing antimicrobial resistance worldwide, monitoring these resistance trends can be performed in health care facilities using an annual summary of susceptibility rates, known as a cumulative antibiogram report.

Aims and Objectives: To study the spectrum of the bacterial isolates and to determine the antimicrobial sensitivity pattern obtained from the bronchoalveolar washing of patients with pulmonary infiltrates who did not respond to initial antimicrobial therapy.

Materials and Methods: Observational and prospective study conducted in Respiratory Medicine Ward of GDMC, Dehradun, Uttarakhand a tertiary care center from 15 Januaary 2024 to 15 May 2023. The study included microbiological reports collected from 52 bronchoalveolar wash samples.

Results: The commonest organisms isolated in the cultures was Klebsiellapneumoniae (13,26.0%) and E. coli (9, 18.0%), followed by Pseudomonas aeruginosa (6, 12.0%), Acinetobacterbaumanii (4,8.0%), Staphylococcus aureus (3, 6.0%)