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Cat Bite Rabies Risk: Why Even Minor Bites Require Urgent Evaluation

Rabies Risk Is Independent of Bite Severity

Any bite or scratch from a potentially rabid animal can transmit virus. The inoculum may be small, but rabies is uniformly fatal once symptomatic. No bite is "too minor" to ignore.

Immediate First Aid

  1. Wash wound thoroughly with soap and running water for ≥15 minutes.
  2. Apply pressure if bleeding; elevate.
  3. Do not suture primarily (increases infection risk).

Medical Assessment

  • Determine animal's vaccination status and availability for 10-day observation.
  • Assess bite location (high-risk: head, neck, hands, genitals).
  • Initiate rabies post-exposure prophylaxis (PEP) if:
    • Animal is rabid, suspected rabid, or unavailable for observation.
    • High-risk exposure (mucous membrane, broken skin, bat contact).

PEP Regimen (US)

  • Day 0: Human rabies immune globulin (HRIG) 20 IU/kg infiltrated around wound + vaccine (HDCV or PCEC) 1 mL IM deltoid.
  • Days 3, 7, 14: Vaccine boosters (4-dose series; 5-dose if immunocompromised).

Animal Observation

If cat is healthy and available, 10-day confinement/observation. If it develops rabies signs, PEP started immediately. If it remains healthy, PEP can be stopped (if already started).

Key Message

Rabies is 100% preventable with timely PEP and 100% fatal without it. Never delay seeking care after a cat bite.

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