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To Study the Microbiological Florae in Patients of Acute Otitis Externa

Vijay Kalra1, Sudeep Sharma1, Nidhi Goel2

  • 1Department of Otorhinolaryngology, PGIMS Rohtak, Rohtak, India.

Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India
|November 19, 2024
PubMed
Abstract

Insights

This study identified common aerobic bacteria in acute otitis externa (AOE) and their antibiotic sensitivities. Pseudomonas aeruginosa and Staphylococcus aureus were most common, with varying susceptibility patterns to different antibiotics.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Otolaryngology

Background:

  • Acute otitis externa (AOE) is a common infection.
  • Understanding the causative aerobic bacteria and their antimicrobial resistance patterns is crucial for effective treatment.

Purpose of the Study:

  • To identify and determine the antimicrobial sensitivities of aerobic bacteria in patients diagnosed with acute otitis externa (AOE).

Main Methods:

  • Prospective analysis of 66 patients with AOE at a tertiary care center in North India.
  • Bacterial culture and sensitivity testing performed on patient samples.
  • Analysis of microbiological data from May 2021 to April 2022.

Main Results:

  • 50 out of 66 samples showed positive bacterial growth.
  • Gram-negative bacteria constituted 60% of isolates, and gram-positive bacteria 40%.
  • Pseudomonas aeruginosa (48%) and Staphylococcus aureus (36%) were the predominant pathogens. P. aeruginosa showed high susceptibility to piperacillin-tazobactam and imipenem, while S. aureus was most susceptible to linezolid and doxycycline.

Conclusions:

  • Bacterial diversity and evolving antimicrobial resistance necessitate periodic assessment of microbiological flora in AOE.
  • Tailoring antibiotic therapy based on local susceptibility patterns is essential for quality and cost-effective patient care.
Keywords:
Acute otitis externaAerobesAntimicrobial susceptibilityMicrobiological floraPseudomonas aeruginosaStaphylococcus aureus

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