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Related Experiment Videos

Antibiogram study over bacterial isolates from cases of bacteraemias

S Nema1, D S Chitnis

  • 1Department of Microbiology and Immunology, Choithram Hospital and Research Centre, Indore.

Indian Journal of Medical Sciences
|September 1, 1996
PubMed
Summary

In 1994, staphylococci were the most common blood culture isolates, with significant methicillin resistance. Netilmycin demonstrated the lowest drug resistance across various bacterial types, indicating its potential efficacy.

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Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Bloodstream infections pose a significant public health challenge.
  • Staphylococcal species, including methicillin-resistant strains, are common causes of bacteremia.
  • Monitoring antimicrobial resistance patterns is crucial for effective treatment strategies.

Purpose of the Study:

  • To analyze the prevalence of bacterial isolates from blood cultures between January and December 1994.
  • To determine the antimicrobial susceptibility profiles of common Gram-positive and Gram-negative pathogens.
  • To evaluate the in vitro efficacy of various antibiotics, with a focus on netilmycin.

Main Methods:

  • Retrospective analysis of 1778 blood specimens collected over a 12-month period.

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  • Identification and antimicrobial susceptibility testing of bacterial isolates.
  • Calculation of resistance percentages for different antibiotic classes and bacterial species.

    • Main Results:

    • Staphylococci accounted for 59.9% of positive blood cultures (703/1778).
    • Thirty-two percent of staphylococcal isolates were methicillin-resistant.
    • Netilmycin exhibited the lowest in vitro resistance among Gram-positive cocci and Klebsiella species.
    • Gram-negative bacilli showed higher sensitivity to netilmycin, amikacin, ciprofloxacin, and third-generation cephalosporins.

    Conclusions:

    • Staphylococci, particularly methicillin-resistant strains, were prevalent in blood cultures during the study period.
    • Netilmycin demonstrated broad in vitro activity and low resistance rates against key pathogens.
    • These findings highlight the importance of ongoing surveillance of antimicrobial resistance and the potential role of netilmycin in treating bloodstream infections.