Bacteriological profile and antimicrobial susceptibility pattern in sterile body fluid specimens from a tertiary care hospital, South India

Abstract

Introduction: Sterile body fluids are biological fluids that do not normally contain any microorganisms. Examples include cerebrospinal fluid (CSF), pleural, peritoneal, synovial, drain, and pericardial fluids along with bile. If these are infected with microorganisms, then this could be life-threatening and may result in severe morbidity and mortality. Therefore, early identification of these organisms with antimicrobial susceptibility is decisive for the proper management of these infections. Materials and Methods: This was a retrospective study conducted between December 2017 and August 2019, in the Department of Microbiology, Jawaharlal Institute of Postgraduate Medical Education and Research. During this period, a total of 4358 sterile fluid samples from patients with suspected body fluid infections were received. Then, the specimen processing, identification, and antimicrobial susceptibility testing were performed. Results: During the study period, a total of 4358 sterile fluid specimens were received which included 313 CSF, 224 pleural, 391 peritoneal, 30 synovial, 66 drain fluid, and 281 bile. Of the samples received, 1305 were culture positive, with an isolation rate of 29.9%. Among the culture positives, the frequency of Gram-negative bacteria was 83.2% (1086/1305) and Gram-positive bacteria: 16.3% (213/1305) and yeast: 0.4% (6/1305). Conclusion: Sterile body fluid infections are usually life-threatening and have a high chance of morbidity and mortality. Therefore, early identification of the organism and performing the antimicrobial susceptibility testing are very important. This not only helps to reduce longer hospital stay and start the patient on targeted therapy but also decreases the risk of acquiring infections in the hospital and develop resistance to antibiotics.