Prevalence and Antimicrobial Susceptibility Patterns of Non-fermenting Gram-Negative Bacteria Causing Lower Respiratory Tract Infections: A Retrospective Study

Abstract

Background and objectives: Lower respiratory tract infections (LRTIs) increase the morbidity and hospital bed occupancy. Cases of LRTI due to non-fermenting Gram-negative bacilli (NFGNB) are common in healthcare institutions. The common NFGNB found nowadays are Pseudomonas aeruginosa, Acinetobacter baumannii, and Burkholderia cepacia. Prophylactic antibiotic use and frequent antimicrobial susceptibility testing (AST) impact the microbes' antimicrobial sensitivity patterns. We planned this study to estimate the prevalence of LRTI due to NFGNB and the antimicrobial sensitivity patterns of the causative microbes.