An article by Don Revis, Consulting Staff, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Florida College of Medicine, puts it this way: "The bacterial inoculum of human bite wounds is rich in oral flora, as saliva contains as many as 100,000,000 organisms per mL, representing as many as 190 different species. Moreover, most of these injuries occur on the hands, and hand wounds of any cause have a higher infection rate than similar wounds in other anatomic locations."
Translation: "It's some nasty shit."
Among the diseases and infections that can attach themselves with a bite (aside from teeth): Hepatitis B. Herpes. TB. Tetanus. Staph. Syphylis (yes, a chomping clamp can give you the clap).
Perhaps worst of all: Hepatitis C.
Former Blue Mound (Texas) PD Officer Truman Bradshaw can tell you a thing or two about getting bitten. Twenty-four years ago, a drunk deposited his teeth into Bradshaw's forearm as the officer was trying to keep the man from falling down and injuring himself. These days, Bradshaw spends his time hoping for an organ donation to come through as he deals with cirrhosis and Stage 4 liver cancer. Considering he rarely drank and never smoked, this isn't the life the once robust man envisioned for himself.