Animal Bite: Classification

Classification of bite injuries according to severity levels

Severity	Clinical picture
Grade I	Superficial skin lesion Laceration Scratch wound Bite channel Crush wound
Grade II	Skin wound, extending to fascia/musculature/cartilage.
Grade III	Wound with tissue necrosis or substance defect.

Staging of open dog bite injuries in the facial region.

Stage	Clinical picture
I	Superficial injury without involvement of the musculature
II	deep injury with involvement of the musculature
III	Title injury with involvement of musculature and substance defect
IVA	Stage III and vascular and nerve injury.
IVB	Stage III and bone involvement