alexa PREVALENCE AND ANTIBIOTIC SUSCEPTIBILITY PATTERN OF METHICILLIN RESISTANT STAPHYLOCOCCI FROM A TERTIARY CARE HOSPITAL IN HYDERABAD


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Research Article

PREVALENCE AND ANTIBIOTIC SUSCEPTIBILITY PATTERN OF METHICILLIN RESISTANT STAPHYLOCOCCI FROM A TERTIARY CARE HOSPITAL IN HYDERABAD

Hajera M1.,Mustafa M2, Sreenivasa Reddy C2., Naidu N.V2., Kiran Kumar V2., Jayasimha Rayalu D3*
  1. Department of Microbiology, Deccan College of Medical Sciences, Hyderabad 500058, Andhra Pradesh, India
  2. Department of Biotechnology, Global Institute of Biotechnology, Himayathnagar, Hyderabad 500 0029
  3. Department of Biotechnology, Akshaya Biological Corporation, Himayat nagar, Hyderabad 500029
Corresponding Author: Jayasimha Rayalu D, Department of Biotechnology, Akshaya Biological Corporation, Himayat nagar, Hyderabad 500029, E-mail: [email protected]
Received: 05 January 2014 Accepted: 03 February 2014
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Abstract

Rising level of resistance to a wide range of antibiotics by both Staphylococcus aureus [SA] and Coagulase Negative Staphylococci [CoNS] represent a significant threat to future treatment efficacy. Present study was carried out to determine the prevalence of Methicillin Resistant Staphylococci [MRS] which included both, Methicillin Resistant Staphylococcus aureus [MRSA] and Methicillin Resistant Coagulase Negative Staphylococci [MRCoNS] from different clinical samples and their invitro susceptibility pattern to various antimicrobials. Methicillin resistance was tested by oxacillin and cefoxitin disk diffusion method. The antibiotic susceptibility pattern of all the isolates was determined by modified Kirby bauer disc diffusion method. Minimum Inhibitory Concentration MIC of Vancomycin was determined by E-test method. Of the 186 isolates, 129 isolates (69.35%) were identified as SA and the remaining 57 (30.64%) as MRCoNs. The frequency of MRSA was 34.10 % ( 44/129) and MRCoNS was 26.31 % (15/57). All MRS isolates were 100% resistant to penicillin and recorded 100% sensitivity to vancomycin. The % resistance of MR isolates towards Teicoplanin was 1.69% (1/59) and Linezolid was 6.77% (4/59). Rifampicin and Amikacin showed resistance of 18.64% (11/59) each. Cefuroxime, Cefadroxil, Gentamycin and Erythromycin showed higher resistance of 74.57%, 64.40%, 64.40% and 61.01% respectively. A higher rate of antibiotic resistance was noted in MRCoNS as compared to MRSA. Hence accurate and prompt detection of methicillin resistance are of key importance in ensuring proper antibiotic treatment in infected patients and control their spread in the hospital environment. A detailed knowledge of their sensitivity to antibacterial agents is thus necessary to facilitate the development of effective strategies to combat the growing problem of resistance.

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