Related Experiment Video
Updated: May 23, 2026

Isolation of Tonsillar Mononuclear Cells to Study Ex Vivo Innate Immune Responses in a Human Mucosal Lymphoid Tissue
Published on: June 14, 2020
Adenotonsillar disease
1Universitatsmedizin Gottingen, Abteilung fur Medizinische Mikrobiologie, Kreuzbergring 57, D-37075 Gottingen, Germany. azautne@gwdg.de
Abstract:
Adenotonsillar disease (adenoiditis and recurrent tonsillitis) is a prevalent otolaryngologic disorder aetiologically based on chronic inflammation triggered by a persistent bacterial infection. These bacteria, mostly Staphylococcus aureus, Haemophilus sp., and Streptococcus sp., persist predominantly intracellular and within mucosal biofilms. The recurrent or chronic inflammation of the adenoids and faucial tonsils leads to chronic activation of the cell-mediated and humoral immune response, resulting in hypertrophy of the lymphoid tonsillar tissue. This hypertrophic tissue is the cause for the prominent clinical symptoms: obstruction of the upper airways, snoring, and sleep apnea for adenoiditis or sore throat, dysphagia and halitosis for recurrent tonsillitis. Treatment strategies should target the persisting bacteria within their biofilm or intracellular shelter. Macrolide antibiotics like clarithromycin are able to modulate the immune system and to interfere in bacterial signaling within biofilms. Clindamycin, quinupristin-dalfopristin, and oritavancin are intracellular high active compounds. Surgical removal of the hypertrophic tissue by modern procedures like laser tonsil ablation, eliminates not only a mechanical obstacle of the airways, it removes also the basis for the aetiologic cause, the "biofilm carrier". This review summarizes the role of bacterial persistence in mucosal biofilms for the aetiology, diagnosis and treatment of adenotonsillar disease and relevant patents.
Insights
Persistent bacterial infections in biofilms cause adenotonsillar disease. Targeting these bacteria or surgically removing infected tissue offers effective treatment for airway obstruction and throat symptoms.
Area of Science:
- Otolaryngology
- Microbiology
- Immunology
Background:
- Adenotonsillar disease, including adenoiditis and recurrent tonsillitis, stems from chronic inflammation due to persistent bacterial infections.
- Bacteria like Staphylococcus aureus, Haemophilus sp., and Streptococcus sp. reside intracellularly and in mucosal biofilms, driving inflammation and lymphoid tissue hypertrophy.
- This hypertrophy causes symptoms such as upper airway obstruction, snoring, sleep apnea, sore throat, dysphagia, and halitosis.
Purpose of the Study:
- To review the role of bacterial persistence in mucosal biofilms in the etiology, diagnosis, and treatment of adenotonsillar disease.
- To discuss current and emerging treatment strategies targeting persistent bacteria.
Main Methods:
- Literature review focusing on bacterial persistence, biofilms, and adenotonsillar disease.
- Analysis of treatment modalities including antibiotics and surgical interventions.
- Consideration of relevant patents in the field.
Main Results:
- Bacterial persistence within biofilms and intracellularly is central to adenotonsillar disease pathogenesis.
- Antibiotics like macrolides (e.g., clarithromycin) can modulate immunity and interfere with bacterial signaling.
- Intracellularly active antibiotics (e.g., clindamycin) and surgical removal of hypertrophic tissue (e.g., laser tonsil ablation) are effective treatment options.
Conclusions:
- Effective treatment requires targeting bacteria within their biofilm or intracellular reservoirs.
- Surgical removal of hypertrophic tissue addresses both mechanical obstruction and the source of persistent infection.
- Understanding bacterial persistence is crucial for advancing the diagnosis and management of adenotonsillar disease.
Related Concept Videos
Tonsillitis I: Introduction
Etiology
Three primary contributing factors have been identified.
Tonsillitis II: Management
Chronic Pharyngitis
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Acute Pharyngitis
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Atypical Pneumonia
Diphtheria
