In an adult patient with a fresh dog‑bite wound presenting within 6–12 hours, no signs of infection and up‑to‑date tetanus immunization, what suture material should be used for skin closure?

Suture Material for Dog Bite Wounds

Primary wound closure is generally NOT recommended for dog bite wounds, with the important exception of facial wounds—therefore, the question of suture material is largely moot for most dog bites. 1

Wound Closure Decision Algorithm

Facial Wounds: Primary Closure Acceptable

• May be sutured if managed with:
  • Copious irrigation with sterile saline
  • Cautious debridement
  • Preemptive antibiotics (amoxicillin-clavulanate 875/125 mg BID for 3-5 days) 1
• Facial wounds have lower infection rates and cosmetic concerns justify closure 1

Non-Facial Wounds: Avoid Primary Closure

• Do NOT suture most dog bite wounds 1
• Wound approximation (bringing edges together without suturing) is acceptable as a weak recommendation 1
• Use Steri-Strips for approximation rather than sutures 2
• Allow healing by delayed primary or secondary intention

High-Risk Locations to NEVER Suture

• Hand wounds: Associated with higher infection rates when closed 1
• Puncture wounds: Should never be closed 1
• Wounds >8-12 hours old: Increased infection risk 2

If Suturing is Performed (Facial Wounds Only)

While the guidelines don't specify exact suture material for bite wounds, general surgical principles apply:

• Monofilament sutures are superior to multifilament sutures regarding infection risk 3
• Avoid silk and braided materials (highest infection rates) 3
• Consider monofilament nylon (Prolene) or polypropylene for skin closure
• Absorbable sutures (polyglactin) for deeper layers if needed

Critical Pitfalls to Avoid

1. Never close hand wounds from dog bites—infection rates are unacceptably high 1
2. Never close puncture wounds—these have penetrated deep structures and cannot be adequately irrigated 1
3. Don't suture wounds presenting >8-12 hours after injury unless facial 2
4. Always provide preemptive antibiotics when closing any bite wound 1

Essential Concurrent Management

Regardless of closure decision:

• Tetanus prophylaxis: Tdap if not given within 10 years (or 5 years for dirty wounds) 1
• Antibiotic prophylaxis for 3-5 days if:
  • Immunocompromised
  • Moderate to severe injury
  • Hand or face involvement
  • Possible joint/periosteum penetration 1
• Rabies evaluation: Consult local health officials 1
• Thorough irrigation: More important than closure method 4

Evidence Quality Note

The IDSA guidelines (2014) provide a strong recommendation against primary closure based on low-quality evidence 1. The single study showing <1% infection with primary closure did not adequately control for wound location, timing, or type 1. The recommendation to avoid closure is based on the principle of infection prevention prioritizing morbidity outcomes, even though the evidence base is limited.

Bottom line: For the scenario described (fresh wound, 6-12 hours, no infection), if this is a facial wound, use monofilament suture with copious irrigation and prophylactic amoxicillin-clavulanate. For any other location, do not suture—approximate with Steri-Strips and allow delayed closure.