Tetanus Prophylaxis After Wounds (Guideline aligned with CDC/ACIP 2025)

Mayta
Jan 14
4 min read

💉 Tetanus Immunization

Ready-to-Use Clinical & Exam Sheet

Identify the wound

Clean wound = clean, minor, superficial
Dirty wound = contaminated, puncture, soil/feces/saliva, devitalized tissue, burns, crush injuries, bites

🧾 Tetanus Immunization Table (COMPLETE)

Situation	Action
No or unknown tetanus history	🧷 Start full primary course (3 doses) • Dose 1: day 0 • Dose 2: ≥4 weeks after dose 1 • Dose 3: 6–12 months after dose 2 ➕ Add TIG if dirty wound
<3 doses received (incomplete series)	🧷 Complete the remaining doses • Continue where left off • Do NOT restart series ➕ Add TIG if dirty wound
≥3 doses, clean wound, last dose ≥10 years	💉 Booster dose (Td or Tdap) x1
≥3 doses, clean wound, last dose <10 years	✅ No booster needed
≥3 doses, dirty wound, last dose >5 years	💉 Booster dose (Td or Tdap) x1
≥3 doses, dirty wound, last dose ≤5 years	✅ No booster needed

💉 Vaccine Details

Vaccine: Td or Tdap
Dose: 0.5 mL IM x1
Tdap preferred if patient has never received Tdap before

🧪 TIG (Tetanus Immune Globulin) — Quick Rules

TIG is used ONLY if BOTH are present:

Dirty / high-risk wound
Inadequate (<3 doses) OR unknown vaccination history

❌ Never needed if:

Clean wound
AND ≥3 documented doses

TIG Dose

250 IU IM once
May increase dose in heavily contaminated wounds
Administer at a separate site from vaccine

Introduction

Tetanus is prevented by good wound care + appropriate tetanus vaccination, and (in selected cases) tetanus immune globulin (TIG). The decision depends on:

Wound type (clean/minor vs dirty/major)
Vaccination history (completed primary series or not)
Time since last tetanus-containing vaccine dose

This update matches CDC’s wound-management guidance (updated June 10, 2025). (ศูนย์ควบคุมและป้องกันโรค)

Step 1 — Classify the wound

Clean & minor wounds

Low tetanus risk (e.g., superficial clean cut).

Dirty or major wounds (higher tetanus risk)

Examples include: puncture wounds, wounds with soil/feces/saliva (animal/human bites), and wounds with devitalized tissue such as burns, compound fractures, crush injuries, frostbite, necrotic/gangrenous wounds. (ศูนย์ควบคุมและป้องกันโรค)

Core wound care: clean all wounds, remove foreign material, debride necrotic tissue when needed. (ศูนย์ควบคุมและป้องกันโรค)

✅ Exam pearl: Do NOT give antibiotics “to prevent tetanus.” Antibiotics are for wound infection, not tetanus prevention. (ศูนย์ควบคุมและป้องกันโรค)

Step 2 — Know the vaccine terms (high-yield)

“Primary series / full course” (adolescents/adults): 3 doses of a tetanus-toxoid–containing vaccine.
“Booster” (maintenance): single dose when indicated (routine every 10 years, or earlier for certain wounds).

If the series was interrupted: continue where it stopped—do NOT restart. (ศูนย์ควบคุมและป้องกันโรค)

Updated Tetanus Immunization Table (Wound Management)

Vaccination history	Clean & minor wound	Dirty or major wound
Unknown / 0 doses	Give vaccine today (start primary series). No TIG.	Give vaccine today + TIG. Start primary series.
Incomplete primary series (<3 doses)	Give vaccine today (continue series). No TIG.	Give vaccine today + TIG. Continue series (no restart).
Completed primary series (≥3 doses)	Booster only if last dose ≥10 years ago. If <10 years: no booster.	Booster only if last dose ≥5 years ago. If <5 years: no booster.
HIV or severe immunodeficiency	(Same as above for vaccine) TIG not indicated for clean/minor.	Give TIG if dirty/major wound, even if vaccination history is unclear/insufficient—CDC lists HIV/severe immunodeficiency as TIG-indicated groups.

This timing rule is exactly how CDC phrases it: booster threshold ≥10 years (clean/minor) and ≥5 years (dirty/major) when the primary series is complete. (ศูนย์ควบคุมและป้องกันโรค)

Which vaccine do I choose (Td vs Tdap)?

For wound prophylaxis and boosters, Tdap or Td can be used (ACIP allows either), but Tdap is preferred if the patient has never received Tdap (or status unknown) as part of catch-up. (ศูนย์ควบคุมและป้องกันโรค)

Dose (adults): Td or Tdap 0.5 mL IM once (deltoid).(Vaccine product volumes are typically 0.5 mL IM; local product labeling applies.)

Primary series schedule (when starting or completing)

Preferred adult catch-up schedule (3-dose primary series): (ศูนย์ควบคุมและป้องกันโรค)

Dose 1 (day 0): Tdap (preferred first dose)
Dose 2: Td or Tdap ≥4 weeks after dose 1
Dose 3: Td or Tdap 6–12 months after dose 2

✅ Your original note “day 0, 4 weeks, 6 months after 2nd dose” is close — the key update is that the 3rd dose is 6–12 months after dose 2 (not strictly 6 months). (ศูนย์ควบคุมและป้องกันโรค)

TIG (Tetanus Immune Globulin) — when and how

Indications (CDC)

TIG is never indicated for clean/minor wounds. (ศูนย์ควบคุมและป้องกันโรค) For dirty/major wounds, TIG is indicated for:

Unknown vaccine history
Never vaccinated
Incomplete primary series
HIV
Severe immunodeficiency (ศูนย์ควบคุมและป้องกันโรค)

Dose and administration

TIG: 250 IU IM once (prophylaxis) (ศูนย์ควบคุมและป้องกันโรค)
Give TIG and vaccine in separate syringes and separate sites (e.g., opposite deltoids/thigh). (eziz.org)

Why TIG matters (exam concept): TIG neutralizes circulating toxin but cannot neutralize toxin already bound to nerve endings—so give it early when indicated. (ศูนย์ควบคุมและป้องกันโรค)

Memory hooks

Dirty wound = booster if ≥5 years (if primary series complete)
Clean wound = booster if ≥10 years (if primary series complete)
Unknown/<3 doses + dirty wound = vaccine + TIG
Never restart the series (just continue)