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Sputum Studies II: Culture and Sensitivity01:20

Sputum Studies II: Culture and Sensitivity

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Description
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
The test can identify various pathogens responsible for respiratory infections, including Streptococcus,...
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Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

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Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
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  1. Home
  3. Bacterial Isolates From Bronchoalveolar Lavage In Pediatric Patients With Protracted Bacterial Bronchitis Or Bronchiectasis: A Retrospective Comparative Study.
  1. Home
  3. Bacterial Isolates From Bronchoalveolar Lavage In Pediatric Patients With Protracted Bacterial Bronchitis Or Bronchiectasis: A Retrospective Comparative Study.

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Bacterial Isolates from Bronchoalveolar Lavage in Pediatric Patients with Protracted Bacterial Bronchitis or

Dafni Moriki1, Maria Tsouprou1,2, Spyridon Prountzos3

  • 1Pediatric Allergy and Respiratory Unit, 3rd Department of Pediatrics, "Attikon" University Hospital, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece.

Journal of Clinical Medicine
|November 13, 2025

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
bronchiectasisbronchoalveolar lavagelower airway infectionpediatricpolymicrobial infectionprotracted bacterial bronchitis

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Protracted bacterial bronchitis (PBB) and bronchiectasis in children show similar lower airway microbiology, suggesting a disease continuum. Younger children with PBB are more susceptible to polymicrobial infections, necessitating early intervention.

Area of Science:

  • Pediatric Pulmonology
  • Infectious Diseases
  • Respiratory Medicine

Background:

  • Protracted bacterial bronchitis (PBB) and bronchiectasis share clinical and microbiological similarities in children.
  • Limited comparative data exists between pediatric PBB and bronchiectasis, particularly regarding bronchoalveolar lavage (BAL) findings.
  • Understanding these differences is crucial for effective diagnosis and management of pediatric airway infections.

Purpose of the Study:

  • To compare bronchoalveolar lavage (BAL) microbiology between pediatric PBB and bronchiectasis.
  • To identify predictors of lower airway and polymicrobial infections in these pediatric respiratory conditions.
  • To investigate the potential for a disease continuum between PBB and bronchiectasis.

Main Methods:

  • Retrospective review of 135 children diagnosed with PBB or bronchiectasis.
  • Analysis included high-resolution computed tomography (HRCT) and bronchoscopy with BAL.
  • Multivariable logistic regression identified predictors of infection, adjusting for clinical factors.

    • Main Results:

    • No statistically significant differences in BAL pathogen distribution between PBB and bronchiectasis after adjustment.
    • Haemophilus influenzae was the most common pathogen in both groups; Moraxella catarrhalis was more frequent in PBB initially.
    • Younger age was an independent predictor of polymicrobial infection (adjusted OR 0.81).

    Conclusions:

    • Similar BAL microbiology supports the concept of a disease continuum between pediatric PBB and bronchiectasis.
    • Younger children are at higher risk for polymicrobial infections in these conditions.
    • Findings advocate for early, targeted antibiotic therapy and close monitoring to prevent irreversible airway damage.