Tetanus

Disease Description (Causes and Symptoms)

• Cause: Caused by the tetanospasmin toxin produced by Clostridium tetani. This anaerobic gram-positive bacillus, found in soil and feces, enters through damage to the skin or mucous membranes and causes infection.
• Pathophysiology: The toxin produced by the bacteria is absorbed from the peripheral nerves into the nerve endings and blocks inhibitory neurotransmission in the central nervous system (mainly GABA and glycine) → excessive motor neuron excitability, muscle rigidity, spasms, and hyperreflexia.
• Main symptoms: Early symptoms include localized muscle rigidity (jaw and face), difficulty swallowing saliva, fever, pain, and hypersensitivity. As the disease progresses, generalized rigidity and intermittent spasms (opisthotonus), respiratory difficulty due to respiratory muscle weakness, and autonomic dysfunction (hypertension, tachycardia, arrhythmia) may occur. Neonatal tetanus causes feeding difficulty and spasms and has a very high mortality rate (a problem in developing countries).

Treatment Methods

• Overview: Since tetanus is a toxin-mediated disease, treatment consists of (1) neutralizing the toxin (passive immunization), (2) eliminating the source of toxin production (wound care), and (3) intensive supportive treatment for symptoms and complications.
• Antitoxin (passive immunization): Human tetanus immunoglobulin (Human TIG) neutralizes unbound free toxin in the blood (administer as soon as possible).
• Antibiotics: Used to eliminate Clostridium (e.g., metronidazole is recommended; penicillin antibiotics may also be used). Intended to manage wound infection.
• Wound treatment: Thorough cleansing, drainage, and debridement prevent opportunities for bacterial proliferation.
• Relief of spasms and muscle tension: Control spasms with benzodiazepines (e.g., diazepam). In severe cases, neuromuscular blockers (in collaboration with anesthesiology) and mechanical ventilation are necessary.
• Airway and respiratory management: Secure the airway immediately if there is respiratory difficulty or a risk of spasmodic asphyxia. Manage long-term mechanical ventilation through endotracheal intubation or tracheostomy.
• Intensive care unit management: Monitor and treat autonomic instability, pulmonary complications, and cardiovascular events.
• Vaccination (active immunization): Even patients who recover do not develop lasting immunity through natural infection, so tetanus toxoid vaccination (primary series or booster) is necessary immediately after treatment (or once the patient is stable).
• Lifestyle management and precautions:
  • Minimize stimuli (noise, light, and touch) to reduce the triggering of reflex spasms.
  • Carefully manage nutrition, fluids, body temperature, and pain.
  • An airway management plan and infection prevention (such as pneumonia prevention) are important.
• Complications: Respiratory failure, pneumonia, cardiovascular instability (arrhythmia and hypertension), fractures (during severe spasms), laryngospasm, sepsis, coma, and possible death.

Checkpoints Before an Outpatient Visit (Including Example Questions)

• Items to prepare and information to confirm:
  • Recent vaccination records (whether tetanus toxoid was administered and the year and month)
  • Wound-related information: date and cause of the wound (nail, puncture, animal bite, etc.), photographs of the wound, and details of wound treatment (self-care and medical treatment)
  • List of currently taken medications (including anticoagulants and immunosuppressants)
  • Allergy history (especially to immunoglobulin and vaccine ingredients)
  • Symptom records: time of onset, frequency and pattern of spasms, whether difficulty swallowing or breathing is present, and whether there is a fever
  • Previous medical records (history of hospitalization or intensive care treatment, and chronic diseases)
  • Whether pregnant (for women)
• Main symptoms to tell the doctor first during the outpatient visit:
  • The jaw is stiff, making it difficult to eat or drink (trismus)
  • Difficulty swallowing and neck stiffness
  • Difficulty breathing or a possibility of breathing difficulty (noisy breathing or shortness of breath)
  • Frequent generalized spasms or autonomic symptoms (heavy sweating and tachycardia)
• Example questions (patients can write these down and bring them):
  • The exact time the symptoms began and how they have changed
  • Recent photographs of the wound and details of treatment

General Example Questions to Ask the Doctor

• Do I need tetanus immunoglobulin (TIG) for this wound?
• When and how should I receive vaccination (tetanus toxoid)? (Primary series/booster intervals)
• What is the standard treatment plan for my current symptoms (criteria for hospitalization and intensive care unit admission)?
• What are the main side effects or risks of this treatment?
• When can I return to daily activities after recovery, and what is the recommended schedule for revaccination (booster)?

Tailored Example Questions by Disease

• Tailored wound-related question: "For this wound (date and cause), do I immediately need TIG or additional vaccination? What measures do you recommend for wound treatment?"
• Tailored question regarding severe disease management: "If I currently have respiratory symptoms or severe spasms, what is the plan for securing my airway, and is ICU admission recommended?"

Additional Brief Reference

• Contagiousness: Tetanus is not transmitted from person to person (contact isolation is not necessary).
• Prevention: Regular tetanus toxoid vaccination (routine childhood vaccination + an adult booster every 10 years); Tdap is recommended during each pregnancy (to protect the newborn).