Related Experiment Video

Updated: Sep 26, 2026

Characterization of Inflammatory Responses During Intranasal Colonization with Streptococcus pneumoniae
09:12

Characterization of Inflammatory Responses During Intranasal Colonization with Streptococcus pneumoniae

Published on: January 17, 2014

[Bacterial flora as a potential etiopathogenic factor for nasal polyps]

Beata Rostkowska-Nadolska1, Małgorzata Fleischer

  • 1Kliniki Otolaryngologii, Akademii Medycznej we Wrocławiu.

Wiadomosci Lekarskie (Warsaw, Poland : 1960)
|April 29, 2003
PubMed

Insights

Bacterial flora in patients with nasal polyps, regardless of type (eosinophilic or neutrophilic), often includes common inflammatory bacteria. Post-polypectomy, the bacterial profile remains similar to that found in patients with nasal polyps.

Area of Science:

  • Otolaryngology
  • Microbiology
  • Immunology

Context:

  • Nasal polyps are linked to disrupted nasal mucosa homeostasis and inflammation.
  • Bacterial and viral infections significantly contribute to the inflammatory and immunological processes involved in polyp development.
  • Bacterial factors can damage cilia, impair mucociliary clearance, and promote epithelial damage, facilitating bacterial colonization.

Purpose:

  • To identify and compare the bacterial flora in patients with nasal polyps (eosinophilic and neutrophilic) and after polypectomy, against a control group of healthy individuals.
  • To investigate the role of bacterial infections in the pathogenesis and persistence of nasal polyps.

Summary:

  • Nose swabs were analyzed from 51 patients with nasal polyps (before surgery), 15 patients post-polypectomy, and 25 healthy controls.
  • Dominant bacterial flora in both eosinophilic and neutrophilic nasal polyp groups comprised bacteria typically associated with inflammation.
  • Bacterial flora in patients after polypectomy did not significantly differ from that observed in patients with active nasal polyps.

Impact:

  • Findings suggest that bacterial presence and composition may play a persistent role in the inflammatory environment of nasal polyps, even after surgical removal.
  • Understanding the specific bacterial profiles can inform future therapeutic strategies targeting the microbiome in chronic rhinosinusitis with nasal polyps.

More Related Videos

Deferred Growth Inhibition Assay to Quantify the Effect of Bacteria-derived Antimicrobials on Competition07:42

Deferred Growth Inhibition Assay to Quantify the Effect of Bacteria-derived Antimicrobials on Competition

Published on: September 3, 2016

Infection of Primary Nasal Epithelial Cells Grown at an Air-Liquid Interface to Characterize Human Coronavirus-Host Interactions09:02

Infection of Primary Nasal Epithelial Cells Grown at an Air-Liquid Interface to Characterize Human Coronavirus-Host Interactions

Published on: September 22, 2023

Related Concept Videos

Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more like...
The Oral Microbiota01:27

The Oral Microbiota

The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Dysbiosis of the Gut Microbiota01:18

Dysbiosis of the Gut Microbiota

The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
Determinants of Bacterial Pathogenicity and Virulence01:20

Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...