Speciation Speciation and Antibiogram of Staphylococcal Isolates from a Tertiary Care Hospital of North East India

Abstract

Background: Infections by staphylococci has been one of the most common isolates among the gram positive cocci.  However emergence of methicillin resistant strains have led to failure of many antibiotics. The present study was undertaken to find out the species of staphylococcal isolates prevalent in Civil Hospital Aizawl, and to correlate its antibiotic sensitivity pattern due to the fact that they are the leading cause of infections and bacteremia.

Methods: Specimens collected between January 2017 to December 2017 were processed using standard conventional methods. Staphylococcal isolates were speciated and antibiogram done using automated culture methods. Interpretation were done as per CLSI guidelines.

Results: 220  non repeated clinical isolates were identified as Staphylococcus species of which 45.4% were S aureus and 54.6%were CoNS. Out of 120 CoNS,  36.6% were S  haemolyticus, 26.7% were S   epidermidis,  12.5% were S saprophyticus, 12.5% were S hominis,  3.3% were S xylosus,3.3% were S cohinii,  1.7% were S lentus,  1.7%  were S warneri, 1.7% were S lugdunensis, and 9.2% were unidentified CoNS. Among the S aureus , 52% were MRSA and among  CoNS , 55% were MRCoNS. All of the isolates were sensitive to Vancomycin.