Anaplasmosis in Dogs (Canine Anaplasmosis)
- Synonyms: Granulocytic ehrlichiosis, canine anaplasmosis
- Occurrence: common
- Location of disease: General/Whole body
When to visit the vet?
Urgent see a veterinarian within 24 hours
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Anaplasmosis is a parasitic infectious disease in dogs caused by bacteria of the genus Anaplasma. These bacteria are mainly transmitted by ticks and lead to various health problems in affected dogs.
Das Wichtigste auf einen Blick
Anaplasmosis in dogs is a tick-borne infectious disease caused primarily by A. phagocytophilum and can lead to systemic, sometimes severe disease courses. Symptoms range from Fever to Lameness to hemorrhagic changes. Diagnosis is made by PCR and serology; therapy with doxycycline is effective. With early treatment, the prognosis is favorable. The most important prevention measure is reliable tick control, especially in endemic areas.
Ursachen
Anaplasmosis is caused by bacteria of the genus Anaplasma, with Anaplasma phagocytophilum and Anaplasma platys being the most common pathogens in dogs. These bacteria are intracellular microorganisms that infect white blood cells or platelets and multiply within them.
Anaplasma phagocytophilum is mainly transmitted through the bite of Ixodes ticks (such as the common wood tick). These ticks are also responsible for the transmission of Lyme disease. Anaplasma platys, on the other hand, is transmitted by the brown dog tick (Rhipicephalus sanguineus) and primarily affects the platelets, leading to temporary thrombocytopenia.
Infection occurs when an infected tick bites a dog and the bacteria enter the dog’s bloodstream while it is sucking blood. These bacteria can then infect the white blood cells or the platelets and lead to a systemic infection.
Symptoms
The symptoms of anaplasmosis in dogs can vary and often depend on the severity of the infection as well as the general health condition of the affected animal. Common symptoms are Fever, lethargy, loss of appetite, and Weight loss. In some cases, dogs may also show Lameness or Joint pain caused by the body’s inflammatory response to the infection.
An infection with Anaplasma platys can lead to thrombocytopenia, in which the number of platelets in the blood decreases. This can lead to a Tendency to bleed, such as nosebleeds, bloody urine, or Bleeding in the skin (petechiae).
Some dogs may also show neurological symptoms such as disorientation or Behavioral changes if the infection affects the central nervous system.
The pattern of “Fever + acute Lameness and Joint pain + coagulation disorder due to thrombocytopenia” after tick exposure is particularly suspicious.
Diagnose
The diagnosis of anaplasmosis is based on a combination of clinical symptoms, medical history, and specific laboratory tests. A complete blood count can reveal anomalies such as thrombocytopenia or anemia that are associated with the infection.
Serological tests that detect antibodies against Anaplasma phagocytophilum or Anaplasma platys are also commonly used diagnostic tools. However, these tests may be positive some time after the infection, as antibody formation takes time.
A polymerase chain reaction (PCR) can be used to directly detect the genetic material of Anaplasma in the dog’s blood. This method is particularly useful for confirming an acute infection.
Therapie
The treatment of anaplasmosis in dogs is usually done with antibiotics, with doxycycline being the drug of choice. Most dogs respond well to a one- to two-week antibiotic therapy.
In severe cases, especially in dogs with severe symptoms or complications such as anemia or severe thrombocytopenia, supportive therapy may be required. This can include the administration of fluids for rehydration, painkillers to relieve Joint pain, or even blood transfusions to treat severe anemia.
It is important to start treatment as early as possible to avoid complications and speed up recovery.
Prognose und Nachsorge
The prognosis for dogs with anaplasmosis is generally good, especially if the disease is diagnosed and treated early. Most dogs recover completely with the right therapy.
In rare cases, however, complications can occur, especially if the infection remains untreated for a long time. These include permanent joint problems or a chronic form of the disease that leads to recurring symptoms.
Regular follow-up care by the veterinarian is important to monitor the success of the treatment and to detect possible relapses early on.
Prävention
The most effective prevention against anaplasmosis is avoiding tick bites. This can be achieved by using tick protection products available as spot-on treatments, collars, or oral medications. It is important to apply these products regularly to ensure continuous protection.
Additionally, the dog should be regularly checked for ticks, especially after walks in areas with high tick populations. Ticks should be removed as quickly as possible to reduce the risk of Anaplasma transmission.
Careful habitat management, such as mowing lawns and removing leaves or tall grass, can also help reduce the tick population in the environment.
Ausblick auf aktuelle Forschung
Anaplasmosis in dogs is a tick-borne disease caused by bacteria of the genus Anaplasma. The two most common pathogens that infect dogs are Anaplasma phagocytophilum and Anaplasma platys. Research in this area currently focuses on various aspects of the disease, including the development of better diagnostic methods, the improvement of treatment protocols, and the investigation of prevention strategies.
A large part of current research deals with improving diagnostic tests for anaplasmosis. Traditionally, serological tests have been used to detect antibodies in dog blood that indicate an infection. However, these tests have their limitations, as antibodies are only detectable several weeks after the infection. New approaches, such as molecular tests that directly detect the genetic material of the pathogen, are being developed to enable earlier and more accurate diagnosis.
Another focus is on researching the pathogenesis of anaplasmosis. Scientists are trying to understand how bacteria bypass the host’s immune system and which mechanisms lead to the clinical symptoms. This could lead to the development of new therapeutic approaches that specifically target the mechanisms of disease development.
The development of vaccines against Anaplasma species is another promising area of research. So far, there is no commercially available vaccine against anaplasmosis in dogs, but advances in vaccine development could provide effective protection in the future. Studies are focusing on identifying antigens that can trigger a strong immune response to protect the dog from infection.
Additionally, researchers are working on developing better treatment protocols. While antibiotics such as doxycycline currently represent the standard treatment, it is being investigated whether alternative or combined therapies are more effective or cause fewer side effects. The development of resistance in bacteria is another relevant topic in this context, and the search for new antibiotics or treatments that can overcome resistance is an active area of research.
The prevention of anaplasmosis through tick control is also an important research aspect. New and more effective tick repellents are being developed, and it is being investigated how environmental management and Behavioral changes can reduce the risk of tick bites. Long-term studies are evaluating the effectiveness of various prevention strategies in different geographical regions and climate zones.
Overall, research on anaplasmosis in dogs contributes to deepening the understanding of this complex disease and developing more effective diagnosis, therapy, and prevention strategies. Advances in molecular biology and immunology offer promising opportunities to better manage the challenges of this infection in the coming years.
Another important area of research is the epidemiology of anaplasmosis. Scientists are studying the spread of the disease in different regions to identify risk factors and understand the effects of climate change on tick populations and transmission dynamics. This information is crucial for developing targeted prevention strategies and better monitoring affected areas.
In summary, current research on anaplasmosis in dogs is multidisciplinary and ranges from basic research to applied science. By combining insights from different areas, comprehensive strategies can be developed to combat this disease, ultimately improving the health of dogs and containing its spread.
Frequently Asked Questions (FAQs)
1. What is anaplasmosis in dogs?
2. How is anaplasmosis diagnosed?
3. What symptoms does a dog with anaplasmosis show?
4. Can anaplasmosis in dogs be treated?
5. How can I protect my dog from anaplasmosis?
6. Is anaplasmosis in dogs contagious to humans?
7. Which dogs are most at risk of getting anaplasmosis?
8. How long does the treatment of anaplasmosis in dogs take?
9. Can dogs fully recover after an anaplasmosis infection?
10. Is there a vaccine against anaplasmosis in dogs?
Literatur
- European Scientific Counsel Companion Animal Parasites. (2024). Control of vector-borne diseases in dogs and cats: ESCCAP guideline 05 (5th ed.). ESCCAP. https://www.esccap.org/uploads/docs/32ir16g1_0775_ESCCAP_Guideline_GL5_20241203_1p.pdf
- Diniz, P. P. V. P., & Moura de Aguiar, D. (2022). Ehrlichiosis and anaplasmosis: An update. Veterinary Clinics of North America: Small Animal Practice, 52(6), 1225–1266. https://doi.org/10.1016/j.cvsm.2022.07.002
- Atif, F. A., Mehnaz, S., Qamar, M. F., Roheen, T., Sajid, M. S., Ehtisham-ul-Haque, S., Kashif, M., & Ben Said, M. (2021). Epidemiology, diagnosis, and control of canine infectious cyclic thrombocytopenia and granulocytic anaplasmosis: Emerging diseases of veterinary and public health significance. Veterinary Sciences, 8(12), Article 312. https://doi.org/10.3390/vetsci8120312
- Facile, V., Sabetti, M. C., Balboni, A., et al. (2024). Detection of Anaplasma spp. and Ehrlichia spp. in dogs from a veterinary teaching hospital in Italy: A retrospective study 2012–2020. Veterinary Research Communications, 48(3), 1727–1740. https://doi.org/10.1007/s11259-024-10358-4
- Schäfer, I., Kohn, B., Silaghi, C., Fischer, S., Marsboom, C., Hendrickx, G., & Müller, E. (2023). Molecular and serological detection of Anaplasma phagocytophilum in dogs from Germany (2008–2020). Animals, 13(4), Article 720. https://doi.org/10.3390/ani13040720
- El Hamiani Khatat, S., Daminet, S., Duchateau, L., Elhachimi, L., Kachani, M., & Sahibi, H. (2021). Epidemiological and clinicopathological features of Anaplasma phagocytophilum infection in dogs: A systematic review. Frontiers in Veterinary Science, 8, Article 686644. https://doi.org/10.3389/fvets.2021.686644
- Gaunt, S. D., Beall, M. J., Stillman, B. A., Lorentzen, L., Diniz, P. P. V. P., Chandrashekar, R., Breitschwerdt, E. B., & Beall, M. J. (2010). Experimental infection and co-infection of dogs with Anaplasma platys and Ehrlichia canis: Hematologic, serologic and molecular findings. Parasites & Vectors, 3, Article 33. https://doi.org/10.1186/1756-3305-3-33
- Granick, J. L., Armstrong, P. J., & Bender, J. B. (2009). Anaplasma phagocytophilum infection in dogs: 34 cases (2000–2007). Journal of the American Veterinary Medical Association, 234(12), 1559–1565. https://doi.org/10.2460/javma.234.12.1559
- Kohn, B., Galke, D., Beelitz, P., & Pfister, K. (2008). Clinical features of canine granulocytic anaplasmosis in 18 naturally infected dogs. Journal of Veterinary Internal Medicine, 22(6), 1289–1295. https://doi.org/10.1111/j.1939-1676.2008.0180.x
- Contreras, E. T., Dowers, K. L., Moroff, S., & Lappin, M. R. (2018). Clinical and laboratory effects of doxycycline and prednisolone in Ixodes scapularis-exposed dogs with chronic Anaplasma phagocytophilum infection. Topics in Companion Animal Medicine, 33(4), 147–149. https://doi.org/10.1053/j.tcam.2018.08.001
- European Scientific Counsel Companion Animal Parasites. (2024). Control of vector-borne diseases in dogs and cats: ESCCAP guideline 05 (5th ed.). ESCCAP. https://www.esccap.org/uploads/docs/32ir16g1_0775_ESCCAP_Guideline_GL5_20241203_1p.pdf
- Diniz, P. P. V. P., & Moura de Aguiar, D. (2022). Ehrlichiosis and anaplasmosis: An update. Veterinary Clinics of North America: Small Animal Practice, 52(6), 1225–1266. https://doi.org/10.1016/j.cvsm.2022.07.002
- Atif, F. A., Mehnaz, S., Qamar, M. F., Roheen, T., Sajid, M. S., Ehtisham-ul-Haque, S., Kashif, M., & Ben Said, M. (2021). Epidemiology, diagnosis, and control of canine infectious cyclic thrombocytopenia and granulocytic anaplasmosis: Emerging diseases of veterinary and public health significance. Veterinary Sciences, 8(12), Article 312. https://doi.org/10.3390/vetsci8120312
- Facile, V., Sabetti, M. C., Balboni, A., et al. (2024). Detection of Anaplasma spp. and Ehrlichia spp. in dogs from a veterinary teaching hospital in Italy: A retrospective study 2012–2020. Veterinary Research Communications, 48(3), 1727–1740. https://doi.org/10.1007/s11259-024-10358-4
- Schäfer, I., Kohn, B., Silaghi, C., Fischer, S., Marsboom, C., Hendrickx, G., & Müller, E. (2023). Molecular and serological detection of Anaplasma phagocytophilum in dogs from Germany (2008–2020). Animals, 13(4), Article 720. https://doi.org/10.3390/ani13040720
- El Hamiani Khatat, S., Daminet, S., Duchateau, L., Elhachimi, L., Kachani, M., & Sahibi, H. (2021). Epidemiological and clinicopathological features of Anaplasma phagocytophilum infection in dogs: A systematic review. Frontiers in Veterinary Science, 8, Article 686644. https://doi.org/10.3389/fvets.2021.686644
- Gaunt, S. D., Beall, M. J., Stillman, B. A., Lorentzen, L., Diniz, P. P. V. P., Chandrashekar, R., Breitschwerdt, E. B., & Beall, M. J. (2010). Experimental infection and co-infection of dogs with Anaplasma platys and Ehrlichia canis: Hematologic, serologic and molecular findings. Parasites & Vectors, 3, Article 33. https://doi.org/10.1186/1756-3305-3-33
- Granick, J. L., Armstrong, P. J., & Bender, J. B. (2009). Anaplasma phagocytophilum infection in dogs: 34 cases (2000–2007). Journal of the American Veterinary Medical Association, 234(12), 1559–1565. https://doi.org/10.2460/javma.234.12.1559
- Kohn, B., Galke, D., Beelitz, P., & Pfister, K. (2008). Clinical features of canine granulocytic anaplasmosis in 18 naturally infected dogs. Journal of Veterinary Internal Medicine, 22(6), 1289–1295. https://doi.org/10.1111/j.1939-1676.2008.0180.x
- Contreras, E. T., Dowers, K. L., Moroff, S., & Lappin, M. R. (2018). Clinical and laboratory effects of doxycycline and prednisolone in Ixodes scapularis-exposed dogs with chronic Anaplasma phagocytophilum infection. Topics in Companion Animal Medicine, 33(4), 147–149. https://doi.org/10.1053/j.tcam.2018.08.001