Incidence and Clinical Outcomes of Multidrug-resistant Respiratory Infection in the Intensive Care Units of a Tertiary Care Hospital: A Prospective, Observational Study
Meghana Sanil, Pratibha Todur, Varun R Nayak, Souvik Chaudhuri
Keywords :
Gram-negative bacteria, Incidence, Intensive care unit, Multidrug resistance
Citation Information :
Sanil M, Todur P, Nayak VR, Chaudhuri S. Incidence and Clinical Outcomes of Multidrug-resistant Respiratory Infection in the Intensive Care Units of a Tertiary Care Hospital: A Prospective, Observational Study. Indian J Chest Dis Allied Sci 2024; 66 (3):89-93.
Background: The surge in income levels coupled with reduced drug costs has contributed to a notable escalation in the utilization of antibiotics among individuals, consequently fostering the emergence of antibiotic resistance. Despite the detrimental effects of antibiotic resistance on patient outcomes, there exists a significant gap in global research, particularly in middle- and low-income countries. Hence, we aimed to evaluate the burden of gram-negative multidrug-resistant (GNB-MDR) respiratory infections in mechanically ventilated patients.
Materials and methods: A single center, prospective-observational study was performed in the intensive care units (ICU) of a Tertiary Care Hospital in Southern India from September 2021 to May 2022. Endotracheal aspirates were collected as per the physician's order and using the standard microbiological methods, gram-negative bacteria were identified, and their antibiotic susceptibility patterns were obtained. Demographic data of patients, clinical profile of the organism and clinical outcomes including the hospital stay, ICU stay and weaning from mechanical ventilation were documented.
Results: Among the 418 admitted patients, the incidence of gram-negative bacteria was 21.5%, among which the occurrence of multidrug-resistant gram-negative bacteria (MDR-GNB) was 16.26%. Acinetobacter baumannii (57.7%) was the most commonly found species, followed by Klebsiella pneumoniae (38.8%) and Escherichia coli (6.6%). About 77.7% of the cohort were carbapenem resistant, of which 90% cases were multidrug resistant. Significantly more MDR-GNB patients have undergone simple and difficult weaning compared to non-multidrug-resistant gram-negative bacteria (NMDR-GNB) infected patients (p = 0.026).
Interpretation and conclusion: The rising prevalence of antibiotic resistance, notably carbapenem resistance, emphasizes the importance of observing the trends in the resistance pattern and conducting routine surveillance in critical care settings to alleviate the associated mortality and morbidity.
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