Ludwig’s Angina

Ludwig’s angina is a rapidly progressive, life-threatening cellulitis involving the bilateral fascial spaces of the floor of the mouth, specifically the submandibular, sublingual, and submental spaces.

Unlike localized abscesses, Ludwig’s angina is characterized by diffuse cellulitis without initial pus formation, resulting in severe tissue edema and elevation of the tongue that may rapidly compromise the airway.

The condition most commonly originates from odontogenic infections, particularly infections of the mandibular second and third molars, whose roots extend below the mylohyoid muscle, allowing direct spread into fascial spaces.

Ludwig’s angina constitutes a true maxillofacial emergency requiring immediate airway assessment, aggressive antimicrobial therapy, and surgical decompression.

Pathophysiology

Infection spreads through fascial planes rather than forming a localized abscess.

Mechanism of spread

• Dental infection develops in mandibular molars

• Infection perforates lingual cortical bone

• Spread occurs above or below the mylohyoid muscle

• Infection extends bilaterally into fascial spaces

• Diffuse cellulitis produces inflammatory edema

• Increased tissue pressure compromises circulation

• Tongue is displaced upward and backward

• Progressive airway narrowing develops

Common causative organisms

• Streptococcus viridans

• Staphylococcus aureus

• Peptostreptococcus species

• Bacteroides species

• Fusobacterium species

• Prevotella species

• Mixed anaerobic oral flora

Risk Factors

• Untreated dental caries

• Dental abscess

• Recent tooth extraction

• Poor oral hygiene

• Mandibular trauma

• Diabetes mellitus

• Immunosuppression

• Malnutrition

• Alcohol abuse

• Tobacco use

Signs and Symptoms

Local manifestations

• Pain in the floor of the mouth

• Rapid bilateral neck swelling

• Tongue elevation

• Dysphagia

• Odynophagia

• Trismus

• Drooling of saliva

• Difficulty speaking

• Muffled or “hot-potato” voice

Systemic manifestations

• Fever

• Chills

• Malaise

• Fatigue

• Tachycardia

Airway danger signs

• Respiratory distress

• Stridor

• Cyanosis

• Anxiety or restlessness

• Use of accessory respiratory muscles

Diagnostic Criteria

Diagnosis is mainly clinical and characterized by:

• Bilateral involvement of submandibular, sublingual and submental spaces

• Brawny, board-like induration

• Non-fluctuant swelling

• Elevated and posteriorly displaced tongue

• Dysphagia with drooling

• Respiratory compromise

Advanced disease may demonstrate tissue necrosis during surgical exploration.

Investigations

Clinical assessment

• Immediate airway evaluation

• Monitoring of vital signs

Imaging studies

(Performed only after airway stabilization)

• Contrast-enhanced CT scan of neck

• MRI when deep tissue involvement is suspected

Laboratory investigations

• Full blood count showing leukocytosis

• ESR or CRP elevation

• Blood glucose testing

• Renal function tests

• HIV testing when indicated

• Culture and sensitivity from drained material

Management

Management follows emergency principles with airway control as priority.

Non-Pharmacological Management

• Immediate hospital admission

• Rapid airway assessment

• Oxygen supplementation

• Early specialist consultation

• Surgical decompression of fascial spaces

• Incision and drainage even without pus

• Irrigation of infected spaces

• Removal of offending tooth when possible

• Placement of surgical drains

• Adequate hydration

• Nutritional support

• Control of systemic diseases

Airway Management

• Awake fiber-optic intubation where available

• Emergency tracheostomy if airway obstruction persists

• Cricothyrotomy in extreme emergencies

Pharmacological Management

(According to Tanzania Standard Treatment Guidelines, 2022)

First-line intravenous therapy

• Ampicillin 500 mg IV every 6 hours

OR

• Amoxicillin–clavulanic acid 1.2 g IV every 8 hours

PLUS

• Metronidazole 500 mg IV every 8 hours

Duration: 5–7 days, followed by oral therapy after improvement.

Severe infection

• Ceftriaxone 1–2 g IV once daily

• Metronidazole 500 mg IV every 8 hours

Penicillin allergy

• Clindamycin 600 mg IV every 8 hours

OR

• Erythromycin 500 mg orally every 6 hours

Step-down oral therapy

Once swallowing improves:

• Amoxicillin–clavulanic acid 625 mg orally every 8 hours for 5–7 days

Complications

• Acute airway obstruction

• Asphyxia

• Deep neck space infection

• Mediastinitis

• Septicemia

• Necrotizing fasciitis

• Aspiration pneumonia

• Internal jugular vein thrombosis

• Multi-organ failure

• Death

Prevention

• Early treatment of dental infections

• Regular dental examination

• Maintenance of oral hygiene

• Prompt management of mandibular molar infections

• Proper aseptic dental procedures

• Good glycemic control in diabetic patients

Patient Education

• Seek urgent care for neck or mouth swelling

• Do not ignore dental pain

• Complete prescribed antibiotics

• Maintain oral hygiene

• Attend follow-up appointments

• Avoid self-medication

Prognosis

Early airway control and aggressive antimicrobial therapy significantly improve survival. Delayed treatment markedly increases morbidity and mortality due to airway obstruction and systemic sepsis.