Microbiological and Clinical Characteristics of Lower Respiratory Tract Infections in Patients from the Pediatric Ward, Adult Respiratory Ward, and Medicine Intensive Care Unit at a University Hospital in Northern India

Abstract

Abstract Background: Respiratory infections are common infections reported among human beings. Infections involving the respiratory tract can be mild and transient and people tend to neglect them. The chief cause of lower respiratory tract infections (LRTIs) can be attributed to hospitalization. Materials and Methods: We conducted a retrospective, cross-sectional study from January 2021 to April 2021. The clinical, demographic, and microbiological characteristics of the patients admitted to adult respiratory ward (ARW), pediatric ward (PW), and medicine intensive care unit (MICU) were extracted from the electronic records and laboratory registers for this study. Results: We included 788 patients in this study from January 2021 to April 2021. The mean age of patients was 52.67 ± 20.15 years with a male predominance in ARW (248/383, 64.75%) and MICU (252/369, 68.29%) and a female predominance in PW (28/36, 77.78%). Most patients were admitted to the ARW (383/788, 48.60%) followed by the MICU (369/788, 46.83%). Bacterial growth was seen in 358 (358/788, 38.89%) respiratory samples. Blood culture was positive in 188 (188/788, 23.86%) samples. The most common microorganism causing LRTI and bloodstream infection was Klebsiella pneumoniae with an infection rate of 32.68% (117/358, 32.68%) and 25.53% (48/188, 25.53%), respectively. Total leukocyte count (P < 0.0001) and procalcitonin (P = 0.0113) were statistically significant diagnostic parameters associated with MDR isolates. Conclusion: This study establishes the range of bacteria obtained from the respiratory samples of LRTI patients and guides the clinicians in the administration of appropriate antibiotics according to the antibiotic susceptibility pattern to eliminate MDR.