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A dog bite is a bite upon a person or other animal by a
dog The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the gray wolf. Also called the domestic dog, it was selectively bred from a population of wolves during the Late Pleistocene by hunter-gatherers. ...
. More than one successive bite is often called a dog attack, although dog attacks can include knock-downs and scratches. Though some dog bites do not result in
injury Injury is physiological damage to the living tissue of any organism, whether in humans, in other animals, or in plants. Injuries can be caused in many ways, including mechanically with penetration by sharp objects such as teeth or with ...
, they can result in
infection An infection is the invasion of tissue (biology), tissues by pathogens, their multiplication, and the reaction of host (biology), host tissues to the infectious agent and the toxins they produce. An infectious disease, also known as a transmis ...
,
disfigurement Disfigurement is the state of having one's appearance deeply and persistently harmed medically, such as from a disease, birth defect, or wound. General societal attitudes towards disfigurement have varied greatly across cultures and over time ...
, temporary or permanent
disability Disability is the experience of any condition that makes it more difficult for a person to do certain activities or have equitable access within a given society. Disabilities may be Cognitive disability, cognitive, Developmental disability, d ...
, or
death Death is the end of life; the irreversible cessation of all biological functions that sustain a living organism. Death eventually and inevitably occurs in all organisms. The remains of a former organism normally begin to decompose sh ...
. Another type of dog bite is the "soft bite" displayed by well-trained dogs, by
puppies A puppy is a juvenile dog, generally one less than 12-18 months old. Puppies are markedly underdeveloped and dependent on their mothers at birth (displaying '' altriciality''), but healthy puppies grow quickly and begin walking thereaft ...
, and in non-aggressive play. Dog bites can occur during dog fighting, as a response to
mistreatment Abuse is the act of improper usage or treatment of a person or thing, often to unfairly or improperly gain benefit. Abuse can come in many forms, such as: physical or verbal maltreatment, injury, assault, violation, rape, unjust practices, ...
, by trained dogs working as
guard Guard or guards may refer to: Professional occupations * Bodyguard, who protects an individual from personal assault * Crossing guard, who stops traffic so pedestrians can cross the street * Lifeguard, who rescues people from drowning * Prison gu ...
,
police The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
or
military animals Military animals are trained animals that are used in warfare and other combat related activities. As working animals, different military animals serve different functions. Horses, elephants, camels, and other animals have been used for both tr ...
, or during a random encounter. There is debate on whether or not certain breeds of dogs are inherently more prone to commit attacks causing serious injury (i.e., so driven by instinct and breeding that, under certain circumstances, they are exceedingly likely to attempt or commit dangerous attacks). It is recognized that the risk of dog bites can be increased by human actions such as abuse or bite training, or through inaction such as neglect, carelessness in confinement or lack of control. Significant dog bites affect tens of millions of people globally each year. It is estimated that 2% of the
U.S. population The United States is the third most populous country in the world, and the most populous in the Americas and the Western Hemisphere, with an estimated population of 340,110,988 on July 1, 2024, according to the U.S. Census Bureau. This was a ...
, 4.5–4.7 million people, are bitten by dogs each year. Most bites occur in children, with nearly half of all children in the U.S. being bitten by a dog at least once by the age of 12. In the 1980s and 1990s, the U.S. averaged 17 deaths per year. Between 2011 and 2021 approximately 468 people were killed by dog bites in the United States, averaging 43 deaths per year. Between 2018 and 2021, deaths were more than doubled for both males (age 15 to 37) and females (age 20 to 44). Animal bites, most of which are from dogs, are the reason for 1% of visits to
emergency department An emergency department (ED), also known as an accident and emergency department (A&E), emergency room (ER), emergency ward (EW) or casualty department, is a medical treatment facility specializing in emergency medicine, the Acute (medicine), ...
s in the United States.


Cause


Breeds

All dog breeds can inflict a bite; breed is not an accurate predictor of whether or not a dog will bite. In the US
pit bull Pit bull is an umbrella term for several Dog type, types of dog believed to have descended from bull and terriers. In the United States, the term is usually considered to include the American Pit Bull Terrier, American Staffordshire Terrier, A ...
-type and
Rottweilers The Rottweiler (, , ) is a breed of domestic dog, regarded as medium-to-large or large. The dogs were known in German as , meaning Rottweil butchers' dogs, because their main use was to herd livestock and pull carts laden with butchered mea ...
most frequently are identified breeds in cases of severe bites. In a study comparing media accounts of 256 dog bite related deaths 2000–2009, when a strict definition was used ("documented pedigree, parentage information, or
DNA test Genetic testing, also known as DNA testing, is used to identify changes in DNA sequence or chromosome structure. Genetic testing can also include measuring the results of genetic changes, such as RNA analysis as an output of gene expression, or ...
results or on the basis of concordance among media breed descriptor, animal control breed descriptor, and the veterinarian-assigned breed from a photograph") the resulting 45 dogs comprised 20 recognized breeds and 2 known crosses. The study also published information comparing when multiple media reports (or media reports compared with animal control reports) differed in reporting the breeds. When using a strict definition ("Rottweiler" is ''not'' equal to "Rottweiler-mix") 30%-40% of the reports varied. When using a less strict definition ("Rottweiler" and "Rottweiler-mix" ''are'' equal enough) only 12%-15% of the reports varied. A 2000 study by the
Centers for Disease Control and Prevention The Centers for Disease Control and Prevention (CDC) is the National public health institutes, national public health agency of the United States. It is a Federal agencies of the United States, United States federal agency under the United S ...
(CDC) of human fatalities from dog bites during the twenty years 1979–1998, reported that pit bull-type dogs and Rottweilers were involved in more than half of the deaths. Published in the
Journal of the American Veterinary Medical Association A journal, from the Old French ''journal'' (meaning "daily"), may refer to: *Bullet journal, a method of personal organization *Diary, a record of personal secretive thoughts and as open book to personal therapy or used to feel connected to onesel ...
, the AVMA's opinion was that the study could not be used to infer any breed-specific risk for dog bite fatalities without also noting the numbers of each breed residing in the US.


Dog behavior

In isolation, predatory behaviors are rarely the cause of an attack on a human. Predatory aggression is more commonly involved as a contributing factor for example in attacks by multiple dogs; a "pack kill instinct" may arise if multiple dogs are involved in an attack.


Prevention

Dog bite prevention is efforts to prevent people being attacked and bitten by dogs. Legislative bodies have addressed concerns about dog bites that include
licensing laws The alcohol licensing laws of the United Kingdom regulate the sale and consumption of alcohol, with separate legislation for England and Wales, Northern Ireland and Scotland being passed, as necessary, by the UK Parliament, the Northern Ireland A ...
, statutes outlawing organized dogfights, and leash laws. Breed-Specific Legislation (BSL) has been enacted in some areas limiting the ownership and activities of dogs perceived to be more likely to bite and attack. Dog breeds targeted by breed-specific regulations include
Rottweiler The Rottweiler (, , ) is a breed of domestic dog, regarded as medium-to-large or large. The dogs were known in German as , meaning Rottweil butchers' dogs, because their main use was to herd livestock and pull carts laden with butchered mea ...
s, American Staffordshire Bull Terriers ("Pit Bulls"),
Chow Chow The Chow Chow is a spitz-type of dog breed originally from Northern China. The Chow Chow is a sturdily built dog, square in profile, with a broad skull and small, triangular, erect ears with rounded tips. The breed is known for a very dense do ...
s,
German Shepherd Dogs The German Shepherd, also known in Britain as an Alsatian, is a German breed of working dog of medium to large size. The breed was developed by Max von Stephanitz using various traditional German herding dogs from 1899. It was originally br ...
, and Doberman Pinschers. Other measures in preventing dog bites are
Beware of the dog Beware of the dog (also rendered as beware of dog) is a warning sign posted at the entrance to a building or other private area indicating that a dangerous dog is within. Such signs may be placed to deter burglary even if there is no dog, or if ...
signage and locked dog enclosures. Some people, like the very young or the very old, are more susceptible to being bitten and therefore may need additional methods of prevention. Dogs can be extremely territorial and protective. Dogs can attack anyone who poses a threat to their companions, whether humans, other dogs, or even cats. Dogs can rival bears and
big cat The term "big cat" is typically used to refer to any of the five living members of the genus ''Panthera'', namely the tiger, lion, jaguar, leopard, and snow leopard. All cats descend from the ''Felidae'' family, sharing similar musculature, c ...
s in ferocity when confronting
burglar Burglary, also called breaking and entering (B&E) or housebreaking, is a property crime involving trespass to land, the illegal entry into a building or other area without permission, typically with the intention of committing a further criminal ...
s, even if they are ordinarily docile. In addition to causing pain, injury, or
nerve damage Nerve injury is an injury to a nerve. There is no single classification system that can describe all the many variations of nerve injuries. In 1941, Herbert Seddon introduced a classification of nerve injuries based on three main types of nerve ...
, almost one out of five bites becomes infected. Those who work and live around dogs should be aware of the risk and take precautions.
Rabies Rabies is a viral disease that causes encephalitis in humans and other mammals. It was historically referred to as hydrophobia ("fear of water") because its victims panic when offered liquids to drink. Early symptoms can include fever and abn ...
is a particular risk associated with dog bites. According to the World Health Organization, 99% of the human rabies cases are caused by dogs. In the United States between 16,000 and 39,000 people come in contact with potentially rabid dogs and other animals and receive rabies pre- and
post-exposure prophylaxis Post-exposure prophylaxis, also known as post-exposure prevention (PEP), is any preventive medical treatment started after exposure to a pathogen in order to prevent the infection from occurring. It should be contrasted with pre-exposure prophy ...
against the rabies virus each year. Because anyone who is bitten by an unvaccinated dog is at risk of getting rabies, local animal control agencies or police are sometimes able to capture the animal and determine whether or not it is infected with rabies. Identifying the risk of being bitten by a dog can prevent an attack and subsequent injury or death. Infants and children are more likely to be bitten. Small children can be attacked if they approach or play with a dog when they are not supervised. Among children, the rate of dog-bite–related injuries is highest for those five to nine years old. Children are more likely than adults to need medical attention for dog bites. Men are more likely than women to be bitten by a dog. Over half of dog-bite injuries occur in the home. Having a dog in the household is associated with a higher likelihood of being bitten than not having a dog. As the number of dogs in the home increases, so does the likelihood of being bitten. Adults with two or more dogs in the household are five times more likely to be bitten than those living without dogs at home. The behavior of a dog may not always indicate its friendliness or unlikelihood of biting. This is because when a dog wags its tail, most people interpret this as the dog expressing happiness and friendliness. Though indeed tail wagging can express these positive emotions, tail wagging is also an indication of fear, insecurity, anxiety, challenging of dominance, establishing social relationships or a warning that the dog may bite.


Health effects

Rabies Rabies is a viral disease that causes encephalitis in humans and other mammals. It was historically referred to as hydrophobia ("fear of water") because its victims panic when offered liquids to drink. Early symptoms can include fever and abn ...
results in the death of approximately 55,000 people per year, with most of the causes due to dog bites. ''
Capnocytophaga canimorsus ''Capnocytophaga canimorsus'' is a fastidious, slow-growing, Gram-negative rod of the genus '' Capnocytophaga''. It is a commensal bacterium in the normal gingival microbiota of canine and feline species, but can cause illness in humans. Trans ...
'',
MRSA Methicillin-resistant ''Staphylococcus aureus'' (MRSA) is a group of gram-positive bacteria that are genetically distinct from other strains of ''Staphylococcus aureus''. MRSA is responsible for several difficult-to-treat infections in humans. ...
,
tetanus Tetanus (), also known as lockjaw, is a bacterial infection caused by ''Clostridium tetani'' and characterized by muscle spasms. In the most common type, the spasms begin in the jaw and then progress to the rest of the body. Each spasm usually l ...
, and ''
Pasteurella __NOTOC__ ''Pasteurella'' is a genus of Gram-negative, facultatively anaerobic bacteria. ''Pasteurella'' species are non motile and pleomorphic, and often exhibit bipolar staining ("safety pin" appearance). Most species are catalase- and oxidas ...
'' can be transmitted from a dog to someone bitten by the dog. ''
Bergeyella zoohelcum ''Bergeyella zoohelcum'' is a Gram-negative, rod-shaped, aerobic and non-motile bacterium from the genus Bergeyella which occurs in the upper respiratory tract of dogs and cats. ''Bergeyella zoohelcum'' has been associated with respiratory dise ...
'' is an emerging infection transmitted through dog bites. Infection with ''B. zoohelcum'' from dog bites can lead to
bacteremia Bloodstream infections (BSIs) are infections of blood caused by blood-borne pathogens. The detection of microbes in the blood (most commonly accomplished by blood cultures) is always abnormal. A bloodstream infection is different from sepsis, wh ...
.


Treatment

When a person receives a dog bite where the skin is broken, the risk of a serious infection can be reduced by cleaning the wound and getting appropriate health care treatment. It is important to find out if the dog's rabies vaccinations are current. A
Cochrane review Cochrane is a British international charitable organisation formed to synthesize medical research findings to facilitate evidence-based choices about health interventions involving health professionals, patients and policy makers. It includes ...
found that there is not much evidence for or against current practices of keeping dog bite wounds left open to heal for a short time before closure (delayed closure) or not stitched at all (no closure) over immediate closure by stitching.


Epidemiology

Significant dog bites affect tens of millions of people globally each year. It is estimated that 1.5–2 percent of the US population, from 4.5 to 4.7 million people, are bitten by dogs yearly. Most bites occur in children. Over half of dog bite injuries occur at home with familiar dogs and having a dog in the household is linked to a higher likelihood of being bitten than not having a dog. As the number of dogs in the home increases, so does the likelihood of being bitten. Dog bites may transmit
zoonotic A zoonosis (; plural zoonoses) or zoonotic disease is an infectious disease of humans caused by a pathogen (an infectious agent, such as a virus, bacterium, parasite, fungi, or prion) that can jump from a non-human vertebrate to a human. When h ...
infections, which may also result in illness or death. Dogs are the primary source of rabies transmission to humans. Information on the extent of traumatic injuries from dog attacks is incomplete, and the number of bites is thought to be underreported. In a survey of dog bites in Pennsylvania, the rate of dog bites was 36 times higher than what had been reported to authorities. According to national estimates, almost 1,000 persons per day are seen in US emergency departments for dog bites. It has been estimated that 1 out of 2 people will sustain a dog-related injury during his lifetime. Most victims are involved in normal, apparently nonprovoking activities before dog attacks. Animal bites, most of which are from dogs, are the reason for 1% of visits to an emergency department in the United States. Some people, like the very young or the very old are more susceptible to being bitten by a dog. From 1979 through 1994 there were approximately 279 deaths related to dog attacks in the United States. More serious injuries from dogs are often described in the media. In 2010, more people were killed by dogs (34) than were hit by lightning (29).
Emergency department An emergency department (ED), also known as an accident and emergency department (A&E), emergency room (ER), emergency ward (EW) or casualty department, is a medical treatment facility specializing in emergency medicine, the Acute (medicine), ...
visits and treatment by those bitten number in the thousands.


Australia

On average 2,061 people received treatment for dog bite injuries each year between 2001 and 2013.


Austria

About 5,900 Austrians are treated annually after being bitten by dogs. One fifth of those injured are children.


United States

In the United States, approximately 4.5 million people are bitten by dogs each year. Approximately twenty percent of dog bites become infected. In a survey of dog bites in Pennsylvania, the rate of dog bites was 36 times higher than what had been reported to authorities. According to national estimates, almost 1,000 persons per day are seen in emergency departments for dog bites. It has been estimated that 1 out of 2 people will have a dog-related injury during their lifetime.


Legal issues

Dog owners may be legally liable for the bites and injuries that their dog causes to people or other dogs. In addition, states and local governments have passed laws and ordinances that allow the government to take action against dogs that are considered dangerous. In some cases, a dog owner may be criminally prosecuted for a dog attack on another person.
Homeowner's insurance Home insurance, also commonly called homeowner's insurance (often abbreviated in the US real estate industry as HOI), is a type of property insurance that covers a private residence. It is an insurance policy that combines various personal insura ...
policies typically provide some liability coverage for dog bites that occur on the insured properties.


United States

All US states recognize that a dog owner may be potentially liable for dog bites. Depending upon the state, the rules for when a dog owner may be liable for a bite will vary. Models of liability for dog bites fall into three broad categories: * ''
Common law Common law (also known as judicial precedent, judge-made law, or case law) is the body of law primarily developed through judicial decisions rather than statutes. Although common law may incorporate certain statutes, it is largely based on prece ...
''. At common law, a dog owner can be held liable for the injury caused by a dog that the owner knows, or has reason to know, may be dangerous. Many common law jurisdictions have historically recognized a "one bite" rule, meaning that absent information that suggests that a dog may be unusually dangerous to others, a dog owner cannot be held liable for the first bite injury caused by their dog. * ''
Strict liability In criminal and civil law, strict liability is a standard of liability under which a person is legally responsible for the consequences flowing from an activity even in the absence of fault or criminal intent on the part of the defendant. Und ...
''. States that impose strict liability make the owner of a dog liable for injuries caused by a dog, without further consideration of the facts. Strict liability laws may require that the person seeking damages for a dog bite prove that they were acting peacefully and lawfully at the time of the bite. The law may also recognize a limited range of defenses to liability, such as the dog owner successfully proving that the injured person was
trespass Trespass is an area of tort law broadly divided into three groups: trespass to the person (see below), trespass to chattels, and trespass to land. Trespass to the person historically involved six separate trespasses: threats, assault, battery ...
ing at the time of the injury or had engaged in conduct that provoked the attack. As of 2023, thirty-six states impose some form of strict liability for dog attacks. * ''Mixed law''. Many states take a mixed approach, passing
statute A statute is a law or formal written enactment of a legislature. Statutes typically declare, command or prohibit something. Statutes are distinguished from court law and unwritten law (also known as common law) in that they are the expressed wil ...
s that are based upon the common law but that add additional elements that must be proven for a dog bite injury to succeed in an injury claim, or provide defenses not available at common law. The United States is not receptive to the idea that the dog itself can be criminally liable for a bite. A California court explained that, although the tendency to
anthropomorphize Anthropomorphism is the attribution of human traits, emotions, or intentions to non-human entities. It is considered to be an innate tendency of human psychology. Personification is the related attribution of human form and characteristics to ...
animals is understandable, especially with beloved pets like dogs, the law does not recognize dogs as having the
mental state A mental state, or a mental property, is a state of mind of a person. Mental states comprise a diverse class, including perception, pain/pleasure experience, belief, desire, intention, emotion, and memory. There is controversy concerning the exact ...
that can incur criminal liability. That is, although dogs and other animals may have the capacity to commit vicious and violent acts, they do not possess the legal ability to commit crimes. States that have enacted legislation that assigns liability include Michigan, Rhode Island, Florida, California, and Texas.


See also

*
List of fatal dog attacks This is a list of human deaths caused by dogs in reverse chronological order, which have been documented through news media, reports, cause-of-death statistics, scientific papers, or other sources. For additional information on causes of death a ...
*
Animal attack Animal attacks are violent attacks caused by non-human animals against humans, one of the most common being bites. These attacks are a cause of human injuries and fatalities worldwide. According to the ''2012 U.S. Pet Ownership & Demographics S ...
*
Beware of the dog Beware of the dog (also rendered as beware of dog) is a warning sign posted at the entrance to a building or other private area indicating that a dangerous dog is within. Such signs may be placed to deter burglary even if there is no dog, or if ...
* Breed-specific legislation *
Cat bite Cat bites are bites inflicted upon humans, other cats, and other animals by the domestic cat (''Felis catus''). Data from the United States show that cat bites represent between 5–15% of all animal bites inflicted to humans, but it has been argue ...
* Coyote attack * Dingo attack *
Dog aggression Dog aggression expressed by dogs is considered to be normal behaviour and various types of aggression are influenced by a dog's environment and genetic predisposition. Dogs commonly display possessive aggression when defending resources or them ...
*
Dog behavior Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli. It has been shaped by millennia of contact with humans and their lifestyles. As a result of this physical and social ...
*
Dogs in the United States The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the gray wolf. Also called the domestic dog, it was selectively bred from a population of wolves during the Late Pleistocene by hunter-gatherers. T ...
*
Man bites dog The phrase ''man bites dog'' is a shortened version of an aphorism in journalism that describes how an unusual, infrequent event (such as a man biting a dog) is more likely to be reported as news than an ordinary, everyday occurrence with similar ...
*
Rabies Rabies is a viral disease that causes encephalitis in humans and other mammals. It was historically referred to as hydrophobia ("fear of water") because its victims panic when offered liquids to drink. Early symptoms can include fever and abn ...
*
Wolf attacks on humans Wolf attacks are injuries to humans or their property by gray wolves. Their frequency varies based on the human and wolf populations and the interactions of these populations. Wolves, like any predator, choose prey based on circumstances. If a ...


Further reading

* *


References


External links

*
NCIPC bibliography of articles on dog bites
(2011)

(2014) {{DEFAULTSORT:Dog Attack Attacks * Dogs Animal bites