How Dogs Get Rabies – Causes, Symptoms, and Prevention

Rabies is a viral disease that has caused widespread concern due to its severe impact on both animals and humans. Among domestic animals, dogs are the most commonly affected by rabies, which can have deadly consequences if not promptly treated. This blog aims to provide an in-depth understanding of how dogs get rabies, the symptoms, the progression of the disease, preventive measures, and the importance of vaccination. By the end of this article, you will have a comprehensive knowledge of rabies in dogs, which can help in safeguarding your furry friends and the community.

What is Rabies?

Rabies is a viral zoonotic disease caused by the rabies virus, which belongs to the Lyssavirus genus. The virus affects the central nervous system of mammals, leading to encephalitis (inflammation of the brain) and, ultimately, death if not treated early. Rabies is transmitted through the saliva of an infected animal, typically through bites. Once the virus enters the body, it travels along the peripheral nerves to the brain, where it replicates and causes severe neurological damage.

How Do Dogs Get Rabies?

1) Transmission of Rabies

Bite from an Infected Animal: The most common way dogs contract rabies is through the bite of an infected animal. The virus is present in the saliva of the rabid animal, and when it bites, the virus is introduced directly into the bloodstream of the dog.

Scratches and Open Wounds: Although less common, rabies can also be transmitted if the saliva of an infected animal comes into contact with scratches, abrasions, or open wounds on the dog’s skin.

Mucous Membranes: In rare cases, rabies can be transmitted if the infected saliva contacts the mucous membranes of the dog’s mouth, nose, or eyes.

2) Common Carriers of Rabies

While any mammal can carry rabies, certain species are more likely to be vectors, meaning they commonly transmit the virus. These include:

Wild Animals: Bats, raccoons, skunks, and foxes are the primary wild animals that carry rabies. These animals can come into contact with domestic dogs, especially in areas where wildlife is prevalent.

Domestic Animals: Unvaccinated cats, livestock, and other dogs can also be sources of rabies. It’s crucial to ensure all domestic animals are vaccinated to prevent the spread of the disease.

Risk Factors for Dogs

Several factors increase the risk of dogs contracting rabies:

• Lack of Vaccination: Unvaccinated dogs are at a higher risk of contracting rabies if exposed to the virus.
• Roaming and Outdoor Access: Dogs that are allowed to roam freely, especially in areas where wild animals are present, have a higher risk of encountering rabid animals.
• Interaction with Wildlife: Dogs that frequently interact with wildlife or are used for hunting are at an increased risk of rabies.
• Geographical Location: Rabies is more prevalent in certain regions. Dogs living in areas with a high incidence of rabies in wildlife are at greater risk.

Symptoms of Rabies in Dogs

Rabies in dogs progresses through several stages, each with distinct symptoms. Recognizing these symptoms can be crucial for timely intervention.

1) Incubation Period

The incubation period is the time between the initial infection and the onset of symptoms. In dogs, this period can vary widely, typically ranging from two weeks to several months. During this time, the virus travels to the brain, and the dog appears healthy.

2) Prodromal Stage

The prodromal stage lasts for about 2-3 days and is characterized by subtle changes in behavior:

• Behavioral Changes: Dogs may become unusually anxious, fearful, or agitated. Conversely, a normally aggressive dog might become unusually affectionate.
• Fever: Dogs may develop a mild fever.
• Pruritus (Itching): Dogs might excessively lick or scratch at the bite site.

3) Furious Stage

The furious stage, also known as the excitative stage, lasts for 1-7 days. It is marked by extreme behavioral changes:

• Hyperactivity: Dogs may become hyperactive and restless.
• Aggression: They may exhibit unexplained aggression, attacking objects, other animals, or people.
• Hydrophobia: Difficulty swallowing and an aversion to water are common due to spasms in the throat muscles.
• Disorientation: Dogs may appear disoriented and have difficulty moving.

4 ) Paralytic Stage

The paralytic stage, also known as the dumb stage, occurs after the furious stage and lasts for 2-4 days:

• Paralysis: Dogs may experience paralysis beginning at the site of the bite and progressing throughout the body.
• Drooling and Difficulty Swallowing: Due to throat and jaw muscle paralysis, dogs often drool excessively and cannot swallow.
• Coma and Death: The disease ultimately leads to coma and death, typically within 7-10 days after symptoms appear.

Diagnosis of Rabies

Diagnosing rabies in dogs involves a combination of clinical observation and laboratory testing.

1) Clinical Observation

Veterinarians will observe the dog’s symptoms and behavioral changes. While these signs can strongly suggest rabies, they are not definitive without laboratory confirmation.

2) Laboratory Testing

• Direct Fluorescent Antibody Test (DFA): This test is the gold standard for diagnosing rabies. It involves taking a sample of brain tissue, which is then tested for the presence of rabies virus antigens using fluorescent antibodies.
• Polymerase Chain Reaction (PCR): PCR can detect rabies virus RNA in various tissues, including saliva, skin, and nerve tissue. It is a sensitive and specific test used in some cases.
• Histopathology: Examination of brain tissue under a microscope can reveal characteristic changes caused by the rabies virus.

3) Post-Mortem Diagnosis

Unfortunately, definitive diagnosis of rabies usually occurs post-mortem because the necessary samples (brain tissue) can only be collected after death. However, recognizing symptoms early and initiating preventive measures can save lives.

Prevention of Rabies in Dogs

Preventing rabies in dogs primarily involves vaccination and responsible pet ownership.

1) Vaccination

• Routine Vaccination: Dogs should receive their first rabies vaccine at around 12-16 weeks of age, followed by booster shots as recommended by a veterinarian. Typically, boosters are administered every one to three years.
• Vaccination of Other Animals: Ensuring other pets and livestock are vaccinated can also help prevent the spread of rabies to dogs.

2) Responsible Pet Ownership

• Leash Laws and Supervision: Keeping dogs on a leash or in a secure, fenced area can prevent them from roaming and encountering rabid animals.
• Avoiding Wildlife: Prevent dogs from interacting with wild animals, especially in areas known for rabies outbreaks.
• Regular Vet Visits: Regular veterinary check-ups can help ensure dogs remain healthy and up-to-date on vaccinations.

3) Community Measures

• Public Awareness: Educating the community about the importance of rabies vaccination and how to recognize symptoms can reduce the incidence of the disease.
• Rabies Control Programs: Many regions have rabies control programs that include vaccination drives, stray dog control, and public education initiatives.

Treatment for Rabies Exposure

If a dog is suspected of being exposed to rabies, immediate action is crucial.

1) Post-Exposure Prophylaxis (PEP)

• Immediate Veterinary Attention: Take the dog to a veterinarian immediately. The vet will clean the wound thoroughly and administer a rabies booster vaccine if the dog’s vaccination status is up-to-date.
• Quarantine: Dogs that have been exposed to rabies and are not up-to-date on vaccinations may need to be quarantined for a period determined by local health authorities.

2) Post-Exposure Management

• Monitoring: Monitor the dog closely for any signs of rabies during the quarantine period.
• Reporting: Report the exposure to local health authorities to aid in tracking and controlling rabies outbreaks.

The Importance of Rabies Control

Rabies control is vital for protecting public health and animal welfare.

1) Human Health

• Prevention of Transmission: Effective rabies control in dogs reduces the risk of transmission to humans. Rabies is nearly always fatal once symptoms appear, so preventing exposure is critical.
• Public Safety: Educating the public about rabies and promoting responsible pet ownership can significantly reduce the incidence of rabies.

2) Animal Welfare

• Reducing Suffering: Rabies causes significant suffering in affected animals. Preventing the disease through vaccination and control measures improves animal welfare.
• Preserving Wildlife: Controlling rabies in domestic animals can also help protect wildlife populations from the disease.

Conclusion

Rabies is a deadly but preventable disease that poses a significant threat to dogs and humans alike. Understanding how dogs get rabies, recognizing the symptoms, and taking proactive measures for prevention are crucial steps in protecting your pets and community. Vaccination remains the most effective method of preventing rabies, and responsible pet ownership plays a vital role in controlling the spread of this disease. By staying informed and vigilant, we can work towards a world where rabies is no longer a threat to our beloved canine companions and ourselves.

Remember, if you suspect your dog has been exposed to rabies, seek immediate veterinary care and follow all recommended protocols. The health and safety of your dog and community depend on timely and appropriate action.

Frequently Asked Questions