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Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat
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Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat

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Telavancin Is Active against Experimental Aortic Valve Endocarditis Caused by Daptomycin- and Methicillin-Resistant

Wessam Abdelhady1, Arnold S Bayer1,2,3, Rachelle Gonzales1

  • 1Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, USA.

Antimicrobial Agents and Chemotherapy
|November 23, 2016
PubMed

Insights

Telavancin (TLV) effectively treated daptomycin-resistant (DAP r) MRSA endocarditis in rabbits. TLV significantly reduced bacterial loads and increased sterile tissues compared to daptomycin or no treatment.

Area of Science:

  • Infectious Diseases
  • Pharmacology
  • Microbiology

Background:

  • Daptomycin-resistant (DAP r) methicillin-resistant Staphylococcus aureus (MRSA) poses a significant clinical challenge.
  • Endocarditis is a severe invasive infection requiring effective antimicrobial therapy.

Purpose of the Study:

  • To compare the in vivo efficacy of telavancin (TLV) and daptomycin (DAP) against DAP r MRSA endocarditis in a rabbit model.

Main Methods:

  • An experimental rabbit endocarditis model was established using two clinical DAP r MRSA strains.
  • Animals were treated with TLV, DAP, or left untreated.
  • Bacterial densities in target tissues were quantified, and the percentage of culture-negative organs was determined.

Main Results:

  • TLV treatment significantly reduced MRSA densities in all examined tissues.
  • TLV significantly increased the proportion of culture-negative organs compared to untreated and DAP-treated groups.
  • Daptomycin treatment showed no significant benefit over the untreated control.

Conclusions:

  • Telavancin demonstrates potent in vivo efficacy against daptomycin-resistant MRSA.
  • TLV is a promising therapeutic option for invasive infections caused by DAP r MRSA isolates.
Keywords:
DAPr MRSAMRSATLVdaptomycin resistanceendocarditisinfective endocarditistelavancin

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