Rabies Infection in Dogs (Rabies)
- Occurrence: rarer
- Location of disease: General/Whole body
When to visit the vet?
Emergency see a veterinarian immediately
Definition
Rabies, also known as rabies, is a fatal viral disease that affects the central nervous system of mammals, including dogs, and is transmitted through the bite of an infected animal.
BASICS/CAUSES:
Rabies is caused by the rabies virus, a member of the Rhabdoviridae family. The virus is neurotropic, meaning it primarily infects nerve cells. After the infection, the virus spreads along the nerve pathways to the central nervous system, causing inflammation of the brain and spinal cord.
The main mode of transmission is the bite of an infected animal, with the virus present in the saliva. Rare modes of transmission include scratches or open Wounds that come into Contact with infected saliva. Wild animals such as bats, raccoons, foxes, and skunks are common reservoir hosts for the virus, and unprotected pets can become infected through Contact with these animals.
After entering the body, the virus first multiplies in the muscle cells near the entry site. It then migrates via the peripheral nerves to the central nervous system, where it leads to the characteristic neurological symptoms. The incubation period, i.e. the time from infection to the onset of symptoms, can vary greatly, ranging from a few days to several months.
Das Wichtigste auf einen Blick
Rabies, known as rabies, is transmitted through the saliva of infected animals, usually through bites. The virus is widespread in many parts of the world, with wild animals such as foxes, bats, and raccoons being common carriers. In dogs, rabies manifests through Change in disposition, Aggressiveness, Anxiety, difficulty swallowing, and increased salivation. A definitive diagnosis is difficult, as the symptoms can resemble those of other neurological diseases. After Death, the virus can be detected in brain tissue samples. During the animal’s life, advanced molecular techniques such as PCR can be used to identify the virus. There is no specific treatment for rabies in dogs, and the disease is almost always fatal after symptoms appear. The focus is on prevention through vaccination. Early vaccination is crucial to minimize the risk. In addition to vaccinations, it is important to limit Contact between pets and wild animals. Research is focusing on developing more effective vaccines and antiviral drugs to stop the progression of the disease. International collaboration is crucial to combat rabies worldwide and ultimately eliminate it.
Ursachen
Transmission through saliva of an infected animal, typically through bites. The virus is endemic in many parts of the world, and wild animals such as foxes, bats and raccoons are common carriers.
Symptoms
The symptoms of rabies in dogs develop in several phases. Initially, non-specific symptoms such as Fever, loss of appetite, and Behavioral changes may occur. Dogs may become withdrawn or unusually clingy.
In the next phase, the so-called “furious” or excited phase, dogs frequently show Irritability, excessive salivation, difficulty swallowing, and aggressive behaviors. This phase can also be characterized by seizures and Disorientation.
Finally, the “paralytic” or silent phase occurs, in which the animals become increasingly weaker and develop Paralysis, beginning in the hind limbs and progressing to general Paralysis. Without treatment, the disease usually leads to Death within 10 days after the onset of symptoms.
Diagnose
The diagnosis of rabies in living dogs is difficult, as the symptoms can resemble those of other neurological diseases. However, a definitive diagnosis can be made after the animal’s Death by detecting the virus in brain tissue samples.
Diagnostic procedures include the direct fluorescent antibody technique (DFA), which can detect the presence of the virus in brain samples, as well as the polymerase chain reaction (PCR). This method is considered the gold standard for rabies diagnosis. While the animal is still alive, a clinical presumptive diagnosis can be made based on the medical history and symptoms; however, it is not definitive.
In some cases, advanced molecular techniques such as polymerase chain reaction (PCR) can be used to identify viral RNA in saliva, skin, or nerve tissue, with applications varying depending on the availability of technology and laboratory resources.
Therapie
Unfortunately, there is no specific treatment for rabies in dogs once clinical symptoms have appeared. The disease is usually fatal, and the focus is on prevention through vaccination. If rabies is suspected, the animal must be kept in quarantine to prevent possible infection of other animals or humans.
In some countries, legal regulations require that dogs showing symptoms of rabies be euthanized to protect public health. This is a difficult but often necessary decision to control the spread of the disease.
For humans who have been exposed to a bite or Contact with a suspected animal, there is post-exposure prophylaxis (PEP), which consists of a series of vaccinations that can prevent the progression of the disease if administered in time.
Prognose und Nachsorge
The prognosis for dogs with rabies is extremely poor, as the disease is almost always fatal once symptoms appear. The rapid and progressive nature of the neurological symptoms usually leads to Death within a few days.
The only way to save the life of an infected animal is to prevent the infection by vaccination before the virus reaches the central nervous system. Early vaccination is crucial to minimize the risk of rabies infection.
The prognosis for the general dog population depends heavily on the effectiveness of vaccination programs and measures to control stray animals and wildlife reservoirs. In regions with high vaccination rates, the risk of rabies infection is significantly reduced.
Prävention
The most effective method for the prevention of rabies in dogs is regular vaccination. Rabies vaccines are widely available and highly effective, and it is recommended that all dogs receive their first vaccination as puppies, followed by regular booster vaccinations according to local regulations and veterinarian recommendations.
In addition to vaccination, it is important to minimize Contact between pets and wild animals. Dogs should remain on a leash in areas where rabies occurs, and access to known habitats of rabies reservoirs, such as bat colonies, should be avoided.
Legal measures to control stray animals as well as sterilization programs can also contribute to reducing the risk of rabies. In some countries, there are programs for vaccinating wild animals against rabies to reduce the risk of transmission to pets and humans.
For people living in or traveling to regions with high rabies risk, pre-exposure vaccination is available, providing additional protection. This is especially important for people who work in close Contact with animals or travel to remote areas where medical care may not be quickly accessible.
Ausblick auf aktuelle Forschung
Research on rabies in dogs has made significant progress in recent years. Scientists worldwide are working on developing more effective vaccines to prevent the disease. A major focus is on improving vaccine stability and extending the duration of protection. Current vaccines provide protection for one to three years, but researchers are working to extend this period to reduce the need for frequent vaccinations.
Another interesting area of research is the development of oral vaccines. These could be particularly beneficial in areas with stray dogs, where conventional vaccination campaigns are difficult to implement. Oral vaccines could be administered in the form of baits that are consumed by dogs without requiring direct human intervention. Initial studies show promising results regarding the efficacy and safety of this method.
Additionally, intensive research is being conducted on the genetic analysis of the rabies virus. This research helps track the spread of different virus variants and better understand how the virus is transmitted between different hosts. Using cutting-edge techniques such as genome sequencing, researchers can identify mutations that affect virulence or transmissibility. This information could be crucial for developing effective control and prevention measures.
Research is also focusing on the immune response of dogs to the rabies virus. Understanding how the immune system of dogs responds to an infection could lead to new therapeutic approaches. Researchers are investigating specific immune markers and the role of various immune cells to identify potential targets for therapeutic interventions.
Another exciting field of research is the development of antiviral drugs that could be used in infected dogs. Currently, there is no cure for rabies once symptoms appear, but researchers are working to develop drugs that can slow or stop the progression of the disease. These drugs could help increase the survival chances of infected dogs and prevent the spread of the virus.
Furthermore, the role of wild animals as a reservoir for the rabies virus is being intensively studied. In many regions, wild animals such as foxes, bats, and raccoons are the main transmitters of the virus. By understanding the dynamics between wild animals, dogs, and humans, researchers hope to develop more effective strategies for controlling the disease. These could include monitoring wildlife populations as well as targeted vaccination campaigns.
International collaboration plays a crucial role in rabies research. Organizations such as the World Health Organization (WHO) and the World Organisation for Animal Health (OIE) coordinate global efforts to combat the disease. This collaboration enables the exchange of research findings as well as the development of global strategies to combat rabies. The long-term goal is to eliminate rabies worldwide, similar to what was achieved with smallpox.
Overall, current research shows promising progress in combating rabies in dogs. The development of new vaccines and antiviral drugs, as well as a better understanding of virus biology and immunology, could help contain the spread of the disease and ultimately lead to its eradication.
Frequently Asked Questions (FAQs)
1. What is rabies (rabies) in dogs?
2. How do I recognize the symptoms of rabies in my dog?
3. How can I protect my dog from rabies?
4. What should I do if my dog is bitten by a possibly rabid animal?
5. Can rabies be transmitted to humans?
6. What happens if a dog has rabies?
7. How long does it take for the symptoms of rabies to appear in a dog?
8. Are there cures for rabies in dogs?
9. Which animals are common transmitters of rabies?
10. Is the rabies vaccination safe for dogs?
Literatur
- World Health Organization. (2018). Rabies vaccines: WHO position paper – April 2018. Weekly Epidemiological Record, 93(16), 201–220. https://www.who.int/publications/i/item/who-wer9316
- World Health Organization. (2018). WHO expert consultation on rabies: Third report (WHO Technical Report Series No. 1012). World Health Organization. https://iris.who.int/handle/10665/272364
- Squires, R. A., Crawford, C., Marcondes, M., & Whitley, N. (2024). 2024 guidelines for the vaccination of dogs and cats – compiled by the Vaccination Guidelines Group (VGG) of the World Small Animal Veterinary Association (WSAVA). Journal of Small Animal Practice, 65(5), 277–316. https://doi.org/10.1111/jsap.13718
- Ellis, J., Marziani, E., Aziz, C., Brown, C. M., Cohn, L. A., Lea, C., Moore, G. E., & Taneja, N. (2024). 2022 AAHA canine vaccination guidelines (2024 update). Journal of the American Animal Hospital Association, 60(6), 1–19. https://doi.org/10.5326/JAAHA-MS-7468
- Dodds, W. J., Larson, L. J., Christine, K. L., & Schultz, R. D. (2020). Duration of immunity after rabies vaccination in dogs: The Rabies Challenge Fund research study. Canadian Journal of Veterinary Research, 84(2), 153–158.
- Morters, M. K., McNabb, S., Horton, D. L., Fooks, A. R., Schoeman, J. P., Whay, H. R., Wood, J. L. N., & Cleaveland, S. (2015). Effective vaccination against rabies in puppies in rabies endemic regions. Veterinary Record, 177(6), 150. https://doi.org/10.1136/vr.102975
- Bobe, K., Ortmann, S., Kaiser, C., Perez-Bravo, D., Gethmann, J., Kliemt, J., Körner, S., Theuß, T., Lindner, T., Freuling, C., Müller, T., & Vos, A. (2023). Efficacy of oral rabies vaccine baits containing SPBN GASGAS in domestic dogs according to international standards. Vaccines, 11(2), 307. https://doi.org/10.3390/vaccines11020307
- Vos, A., Kasemsuwan, S., Leelahapongsathon, K., Bobe, K., Perez-Bravo, D., Kliemt, J., Phawaphutayanchi, P., Aiyara, N., Freuling, C. M., & Müller, T. (2023). Long-term immunity induced by SPBN GASGAS in orally vaccinated dogs is non-inferior to inactivated rabies vaccines. Vaccine: X, 15, 100410. https://doi.org/10.1016/j.jvacx.2023.100410