Speciation and Antimicrobial Susceptibility of Coagulase Negative Staphylococci, Isolated from the Anterior Nares of Health Care Workers, in A Tertiary Care Hospital in South India, with Special Reference to Methicillin Resistance
Journal Title: International Journal of Contemporary Medical Research - Year 2016, Vol 3, Issue 8
Abstract
Introduction: Coagulase negative staphylococci (CoNS) are identified as emerging pathogens causing nosocomial infections, with significant morbidity and mortality. Speciation of CoNS helps in the understanding of their susceptibility patterns, the reservoirs and the epidemiology. CoNS are multidrug resistant and act as reservoirs for drug resistant genes. They are found in health care workers (HCWs), who act as reservoirs and help, in the spread of nosocomial infections. This study was undertaken to determine the occurrence, the species and susceptibility pattern of CoNS isolated from the anterior nares of HCWs working in our tertiary care hospital. Material and Methods: Anterior nasal swabs were taken from a total of 310 HCWs. Speciation of CoNS was done by a practical scheme adopted from various references. Kirby Bauer disc diffusion method was performed as per CLSI guidelines. Statistical methodology: Percentage description of the data was given. Results: The rate of isolation of CoNS was 55.8% (173/310). Among the 173 CoNS isolated in this study, 44%(76/173 ) were S. haemolyticus, 30% (52/173) were S. warneri, 14%(25/173) were S. capitis, 5% (8/173 )were S. simulans, 4%(7/173) were S. epidermidis, 2%(3/173) were S. schleiferi and 1%(2/173) were S. lugdenensis. 16.18% of the isolates were MRCoNS. Doctors had the highest number of MRCoNS (10/28, 35.7%). Methicillin resistance was highest in S. lugdenensis (50%). Multidrug resistance was seen in the CoNS isolates. All isolates were sensitive to vancomycin. Conclusion: This study reiterates the need to screen HCWs for CoNS and to adopt simple, economical and user friendly tests for speciation. The species and its susceptibility pattern help to eliminate reservoirs and prevent nosocomial infections.
Authors and Affiliations
Ragini Ananth Kashid, Kausalya Raghuraman
Keywords
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