Shark bite

Background

• From subclass Elasmobranchii of the class Chondrichthyes ("cartilaginous fishes")
• White shark (Carcharodon carcharias), tiger shark (Galeocerdo curvier) appear to be disposed to human attacks than other species
• Approximately 70-100 shark attacks worldwide per year and 5-15 deaths

Clinical presentation

• Direct traumatic effects depend on size and species of shark
• Typically, attack appendages of victims
  • In 70% on surface swimmers, only the lower limb is involved
  • Upper limb may be injured when the victim attempts to fight off the attack
• Massive tissue injury
• Substantial tissue loss and extremity amputation common
• Hemorrhagic shock
• Extremely high incidence of contamination with atypical microorganisms leading to wound infections