The deadliest dogs
A review of 82 dog bite cases at a level 1 trauma center where the breed of dog was identified concludes that attacks by pit bulls are associated with higher morbidity rates, higher hospital charges, and a higher risk of death than are attacks by other breeds of dogs. Bini, John K. MD; Cohn, Stephen M. MD; Acosta, Shirley M. RN, BSN; McFarland, Marilyn J. RN, MS; Muir, Mark T. MD; Michalek, Joel E. PhD; for the TRISAT Clinical Trials Group, Mortality, Mauling, and Maiming by Vicious Dogs, Annals of Surgery (April 2011, Vol. 253, Issue 4, pp. 791–797).
Merritt Clifton, editor of Animal People, has conducted an unusually detailed study of dog bites from 1982 to the present. (Clifton, Dog attack deaths and maimings, U.S. & Canada.) The Clifton study show the number of serious canine-inflicted injuries by breed. Pit bulls stand out as, by far, the most deadly breed, but there are other deadly groups, chiefly the molloser category of breeds, which in addition to pit bulls include Rottweilers, Pres Canarios, Cane Corsos, mastiffs, Dogo Argentinos, Fila Brasieros, Shar-Pei's, boxers, boerboels and their mixes. In more than two-thirds of the cases included in the study, the life-threatening or fatal attack was apparently the first known dangerous behavior by the animal in question. Clifton states:
If almost any other dog has a bad moment, someone may get bitten, but will not be maimed for life or killed, and the actuarial risk is accordingly reasonable. If a pit bull terrier or a Rottweiler has a bad moment, often someone is maimed or killed--and that has now created off-the-chart actuarial risk, for which the dogs as well as their victims are paying the price.
Clifton's opinions are as interesting as his statistics. For example, he says, "Pit bulls and Rottweilers are accordingly dogs who not only must be handled with special precautions, but also must be regulated with special requirements appropriate to the risk they may pose to the public and other animals, if they are to be kept at all."
Clifton's website is Animals 24/7 and his compendium of pit bull information is titled Pit Bull Statistics. He is one of the top two researchers in the USA pertaining to pit bulls, the other being Colleen Lynn whose website is DogsBite.org. Ms. Lynn's website is a trove of detailed analysis of pit bull mayhem.
https://dogbitelaw.com/dog-bite-statistics/all-dog-bite-statistics