Tick bite

Author: Dr. med. vet. Gisa Löwe | Last modified: 06.02.2026
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Tick on the skin of a cat

Tick bite
A tick bite is the attachment of a tick with skin injury and local inflammatory reaction. The risk lies primarily in the transmission of pathogens such as Borrelia, Anaplasma or Babesia. Clinical Symptoms: may not appear until days or weeks later and should be clarified if there are any abnormalities.

Ticks are blood-sucking parasites from the class of arachnids (Arachnida) and belong to the order of mites (Acari). They are obligate ectoparasites that live temporarily on their host animals and feed on their blood. For dogs and cats, ticks are not only a local nuisance, but they also act as vectors of various pathogens that can have serious health consequences.

Various types of ticks are common in Germany, with the castor bean tick (Ixodes ricinus) being the most common species. Other relevant species are the ornate cow tick (Dermacentor reticulatus), the brown dog tick (Rhipicephalus sanguineus) and, increasingly, the relic tick (Haemaphysalis concinna). The life cycle of a tick comprises four stages of development: egg, larva, nymph and adult tick. In each stage after the egg, the tick needs a blood meal to develop further.

The activity of ticks is highly dependent on temperature and humidity. While the castor bean tick is mainly active from March to October, with peak activity in spring and autumn, the ornate cow tick can become active at temperatures just above freezing. Climate change is increasingly leading to an expansion of the activity periods and a change in the geographical distribution of various tick species.

 

Causes

Tick infestations in pets usually occur when they are in habitats with many ticks. Ticks prefer moist, shady areas with dense vegetation such as forest edges, tall grass, bushes and undergrowth. They lie in wait on blades of grass or low bushes and are attracted by carbon dioxide, body heat and movement.

Various types of ticks are native to Germany and some are widespread. The castor bean tick (Ixodes ricinus) is the most common species and can transmit various pathogens, especially Borrelia. The ornate cow tick (Dermacentor reticulatus) transmits babesiosis, a dangerous disease primarily for dogs. The brown dog tick (Rhipicephalus sanguineus) can be active all year round, especially in warmer regions and in heated interiors, and transmits, among other things, Ehrlichia.

The transmission of pathogens occurs through the saliva of the tick during the sucking process. Contrary to the widespread assumption that transmission only occurs after 24 hours, some pathogens, such as certain types of Borrelia, can be transmitted after just a few hours. Other pathogens such as Babesia can even enter the host immediately after the bite.

Certain factors increase the risk of a tick infestation: frequent stays in forests or meadows, long or dense fur, limited grooming (especially in older or sick animals) and certain activities such as hunting or free running in rural areas. The season also plays a crucial role, with the risk generally being higher in the warmer months, but tick activity is increasingly being observed in the winter months due to climate change.

Symptoms

Tick bite in dogs and cats

Typical Symptoms:

  • Tick visible/palpable in the skin (often head, neck, armpit, groin)

  • Small local redness, slight Swelling, Itching

  • Licking/Scratching at the site, possibly crust after removal

  • Usually no general Symptoms: in the first few hours

Warning signs:

If a Lyme disease infection has occurred, non-specific symptoms appear after 1 to 4 weeks.

  • Lethargy, weakness, apathy, Fever
  • Loss of appetite
  • Swollen joints
  • Lameness, sometimes changing
  • Slight Fever
  • Lymph node Swelling
  • Kidney inflammation possible
  • Pale mucous membranes, dark urine, jaundice (indication of hemolysis/liver involvement)
  • Shortness of breath, collapse
  • Neurological Symptoms:: Staggering / ataxia, Paralysis, tremors (especially after multiple ticks)
  • Severe Swelling, pus, significant Pain at the bite site (secondary infection)

Escalation/course:

  • 0–48 hours: mostly local; increasing redness/warmth/Pain → local inflammation/infection possible
  • 3–21 days after tick bite: possible systemic diseases (depending on region/pathogen) → Fever, fatigue, Lameness, loss of appetite escalate the urgency
  • Days–Weeks: recurring episodes (Fever/Lameness), Weight loss or pale mucous membranes → clarification urgently needed
  • After removal: If a “knot” forms or a weeping area remains → foreign body reaction/tick debris/abscess possible

 

The Symptomatik after a tick bite can be very diverse and depends largely on whether pathogens have been transmitted. Immediately after a tick bite, the Symptoms: are usually mild and localized:

The first Symptoms: after a tick bite are typically Itching and local redness at the bite site. Occasionally, a small Swelling may form, but this usually subsides within a few days. In some animals, a small crust or scab forms at the puncture site.

The Symptoms: caused by transmitted pathogens are much more significant. If a Borrelia infection has occurred, non-specific complaints often occur after an incubation period of 1 to 4 weeks. These include fatigue, loss of appetite and a slight Fever. Swollen joints and changing Lameness, which can often migrate from one limb to another, are also characteristic. Lymph node Swelling is also frequently observed. In advanced cases, kidney inflammation can occur, which can have serious consequences, especially in dogs.

In the case of anaplasmosis, the affected animals often show high Fever, lethargy, loss of appetite and Joint pain. Laboratory tests often indicate thrombocytopenia (reduced number of platelets), which can lead to an increased Tendency to bleed.

Babesiosis, which is primarily relevant in dogs, manifests itself through high Fever, anemia, jaundice and dark-colored urine due to the destruction of red blood cells. If left untreated, it can quickly lead to a life-threatening condition.

In cats, tick-borne diseases are often more subtle. They may show loss of appetite, lethargy and non-specific Symptoms: such as an elevated body temperature. Some infected cats even remain completely asymptomatic, but can still develop long-term damage.

First Aid

  1. Searching the coat daily, even in cats if the animals have outdoor access, significantly reduces the risk of Borreliosis occurring (see Fig.).
  2. Simply pull the tick out with your hand or tweezers with a small jerk. Grasp the tick as close to your animal’s skin as possible.
  3. Do not twist or squeeze the tick.
  4. Applying oil so that the tick falls off on its own is also not recommended.
  5. All unnecessary manipulations can lead to more of the tick’s saliva getting into your animal, increasing the risk of infection.
  6. If you are unable to remove the tick, take your animal to a veterinarian.
  7. If you were able to remove the tick and an inflammation still appears at the bite site in the next few days, take your animal to a veterinarian.
  8. If you spend a lot of time in the forest with your animal or use your animal for hunting, a vaccination against diseases transmitted by ticks may be useful.
  9. If you see a veterinarian because of unclear signs of illness in your animal and have noticed ticks on your animal more often recently, tell your veterinarian.

Diagnosis

The diagnosis of tick-related diseases in dogs and cats requires a systematic approach that combines clinical examination, medical history and specific laboratory tests.

First, a thorough clinical examination of the animal is carried out, paying particular attention to signs such as Lameness, Swelling of joints, Fever and lymph node enlargement. The medical history plays a crucial role – information about recent tick bites, stays in risk areas and the timing of the Symptoms: provide important diagnostic information. If you see a veterinarian because of unclear signs of illness in your animal and have noticed ticks on your animal more often recently, be sure to tell your veterinarian.

Various laboratory tests are available for the specific detection of tick-borne pathogens:

If Borreliosis is suspected, serological tests are carried out to detect antibody against Borrelia. It should be noted that a positive antibody detection can also indicate a previous infection or Impfung. Therefore, two-stage test methods are often used: first an ELISA (Enzyme-linked Immunosorbent Assay) and, if the result is positive, a more specific Western blot test. Tests in the blood or cerebrospinal fluid (CSF) enable reliable detection of the pathogen.

For direct pathogen detection, the PCR (polymerase chain reaction) is used, which can detect pathogen DNA in blood, tissue or joint aspirates. This method is particularly valuable in early stages of infection when no antibody have yet been formed.

If anaplasmosis or babesiosis is suspected, blood smears are examined microscopically to detect the pathogens directly in the blood cells. In addition, serological tests and PCR tests can be carried out.

A complete blood count and blood chemical tests provide important information about organ functions and can reveal characteristic changes such as thrombocytopenia in anaplasmosis or anemia in babesiosis.

In cases of neurological symptoms, an examination of the cerebrospinal fluid (CSF) may be necessary to assess involvement of the nervous system.

The diagnostic challenge often lies in distinguishing between an active infection and a past illness or vaccination reaction. Therefore, the interpretation of laboratory results should always be made in the context of the clinical symptoms and the medical history.

Further veterinary measures

Borreliosis is caused by a bacterium that can be transmitted by ticks. The Symptoms: are often non-specific, such as Fever, Reluctance to move and changing Lameness. The joints and nervous system are primarily affected.

In rare cases, damage to the kidneys and inflammation of the heart muscle can occur. Tests in the blood or cerebrospinal fluid (CSF) enable reliable detection of the pathogen. The detection of antibody could also indicate a previous illness, so the clinical picture must also be taken into account in these tests.

A specific antibiotic therapy leads to the killing of the pathogen. It must be carried out consistently over 4 weeks. If left untreated, a chronic disease can develop.

Supplements

The treatment of tick-related diseases depends on the specific infection and the clinical condition of the animal. In principle, the earlier the therapy begins, the better the chances of recovery.

If Borreliosis is detected, antibiotic therapy is required over a longer period of time. Doxycycline is the drug of first choice and is usually administered for 4 weeks. This antibiotic is particularly effective against Borrelia and can also cross the blood-brain barrier, which is important for neurological manifestations. Alternatively, amoxicillin or cephalosporins can be used in case of intolerance or in pregnant animals. The antibiotic treatment must be carried out consistently to avoid a relapse.

Doxycycline is also used for anaplasmosis, but usually for a shorter period of 2 to 3 weeks. The Symptoms: usually improve within a few days of starting therapy.

The treatment of babesiosis requires specific antiprotozoal agents such as imidocarb or diminazene. These are administered as injections and may need to be repeated depending on the severity of the disease. In severe cases with pronounced anemia, a blood transfusion may be necessary.

Symptomatic measures are initiated in addition to the specific therapy. Non-steroidal anti-inflammatory drugs are used for Fever and Pain. Infusion therapy is indicated for dehydration. Joint inflammation can be treated with immobilization and anti-inflammatory drugs.

In severe cases, especially if organs such as the kidneys or heart are affected, intensive care may be required. In the case of kidney involvement as part of Borreliosis, specific nephroprotective therapy with ACE inhibitors and an adapted diet may be necessary.

Regular check-ups should be carried out during treatment to monitor the success of the therapy and, if necessary, adjust the treatment. Laboratory controls are particularly important to monitor organ functions and to identify possible side effects of the medication at an early stage.

Prognosis and aftercare

The prognosis for tick-borne diseases depends largely on the time of diagnosis, the type of pathogen, and the general health of the animal. With early detection and adequate treatment, the prognosis for most tick-borne diseases is good.

In the case of Lyme disease, the prognosis is generally favorable with timely antibiotic treatment. The clinical symptoms largely improve within 24–48 hours after the start of therapy. However, with delayed treatment, chronic damage to the joints, kidneys, or nervous system may remain. In particular, Lyme nephritis in dogs can take a progressive course despite therapy and lead to irreversible kidney damage.

Anaplasmosis generally responds well to therapy, and most animals recover completely. The platelet count usually normalizes within 1–2 weeks after the start of therapy.

In babesiosis, the prognosis depends on the severity of the disease at the time of diagnosis. Early treated cases have a good prognosis, while severe cases with multiple organ failure can be life-threatening despite intensive therapy.

Aftercare following tick-borne diseases includes several aspects:

Regular check-ups are necessary to monitor the success of the therapy. These should include clinical examinations and, if necessary, laboratory tests. In the case of Lyme disease, follow-up examinations are often recommended after 4 weeks, 3 months, and 6 months.

Long-term monitoring of organ functions is particularly important in animals that have suffered a severe illness. In dogs with Lyme nephritis, regular kidney function tests and urine tests are indicated.

Preventive measures to avoid renewed tick bites are a central component of aftercare. These include regular use of tick repellents, daily searching of the coat, and avoiding tick-infested areas during peak activity times.

Special caution is advised for animals that have had a tick-borne disease, as complete immunity does not develop and reinfections are possible. In addition, some pathogens, such as Borrelia, can persist in the body despite adequate therapy and be reactivated in the event of immunodeficiency.

Summary

Ticks pose a significant health threat to dogs and cats, not primarily through blood loss, but especially as vectors of various pathogens. Several tick species are common in Germany, with the castor bean tick (Ixodes ricinus) being the most common and mainly transmitting Borrelia. Other relevant species are the ornate cow tick (Dermacentor reticulatus) as a vector of babesiosis and the brown dog tick (Rhipicephalus sanguineus), which can transmit Ehrlichia, among other things.

The main diseases transmitted by ticks in pets are Lyme disease, anaplasmosis, and babesiosis. The symptoms of these diseases are often non-specific and can include fever, lethargy, loss of appetite, and lameness. In Lyme disease, alternating lameness and swelling of joints are characteristic, while babesiosis is characterized by anemia and jaundice.

The diagnosis is made through a combination of clinical examination, medical history, and specific laboratory tests such as serological tests, PCR, and blood count analyses. The therapy depends on the specific infection, with Lyme disease and anaplasmosis being treated with antibiotics (mainly doxycycline) and babesiosis with antiprotozoal agents.

The prognosis is usually good with early detection and adequate treatment, but chronic damage can remain if therapy is delayed. Prevention is particularly important through regular use of tick repellents, daily searching of the coat, and in certain cases vaccinations against tick-borne diseases.

A daily search of the coat, even in cats with outdoor access, significantly reduces the risk of Lyme disease. When removing ticks, care should be taken to proceed correctly: the tick should be grasped close to the skin with tick tweezers or a tick card and removed with a slight pull without squeezing or twisting it to minimize the transmission of pathogens.

Climate change is leading to an expansion of the activity periods and geographical distribution of ticks, which increases the risk of tick-borne diseases. Therefore, preventive measures and awareness of these diseases are becoming increasingly important.

Outlook on current research

Research into tick-borne diseases in pets is a dynamic field with numerous current developments. Several key areas are emerging that could improve the management and prevention of these diseases in the future.

A significant area of research concerns the development of new vaccines against tick-borne pathogens. While vaccines against certain Borrelia strains are already available for dogs, scientists are working on vaccines with a broader spectrum of activity that cover multiple Borrelia species. In addition, vaccines against anaplasmosis and babesiosis are being developed, which cannot yet be prevented by vaccinations. A promising approach is “anti-tick vaccines” that are not directed against the pathogens, but against proteins in the tick saliva and could thus prevent the transmission of various pathogens simultaneously.

Molecular diagnostics are continuously being refined. Multiplex PCR methods enable the simultaneous detection of several pathogens in one sample, which is particularly relevant in the case of co-infections. Point-of-care tests are being developed that allow faster diagnosis directly in the veterinary practice. New serological tests with higher specificity help to better distinguish active infections from past illnesses or vaccination reactions.

In the field of tick control, new active ingredients and formulations are being researched that offer longer duration of action, better tolerability, and lower environmental impact. Particular attention is paid to preparations that are safe for cats, as many conventional tick remedies can be toxic to them. Biological control methods are also being investigated, such as natural enemies of ticks or fungi that infest ticks.

Research into the transmission mechanisms of pathogens by ticks has led to new findings. Contrary to earlier assumptions, some pathogens can be transmitted within a few hours after the tick bite. These findings underscore the importance of rapid tick removal and continuous tick prophylaxis.

Epidemiological studies are investigating the spread of tick species and tick-borne pathogens through climate change. Warmer winters and longer vegetation periods are changing the activity patterns and distribution areas of ticks, leading to new risk areas. Monitoring programs and tick monitoring systems help to record these changes and adapt prevention strategies.

The One Health perspective is becoming increasingly important, as many tick-borne pathogens can affect both humans and animals. Interdisciplinary research approaches that combine veterinary medicine, human medicine, and ecology promise a more comprehensive understanding and better control strategies for these diseases.

Frequently asked questions (FAQs)

  1. Why is a tick bite dangerous for my animal?
    Ticks can transmit various pathogens such as Borrelia, Anaplasma or Babesia. These can cause serious illnesses that, if left untreated, can lead to chronic damage or even Death.
  2. How do I recognize a tick bite on my pet?
    The tick itself is usually visible when it is still sucking on the animal. After it falls off, a small puncture site or a red dot often remains. Sometimes a local Swelling or redness develops.
  3. How do I remove a tick properly from my dog or cat?
    Use special tick tweezers or a tick card, grasp the tick as close to the skin as possible and pull it out with a slight jerk. Avoid twisting, squeezing or applying oil, as this increases the risk of infection.
  4. When should I see a veterinarian after a tick bite?
    If you cannot remove the tick completely, if the bite site becomes inflamed, or if your animal shows Symptoms: such as Fever, Lameness or loss of appetite in the weeks after the bite.
  5. Can cats also suffer from tick-borne diseases?
    Yes, cats can also be infected by tick bites, with Borreliosis and anaplasmosis being possible. However, cats often show less obvious Symptoms: than dogs.
  6. How can I protect my animal from ticks?
    Use suitable tick repellents (spot-ons, collars, tablets), thoroughly search your animal’s coat after walks and avoid tick-infested areas such as tall grass and undergrowth during peak activity times.
  7. Is a Impfung against tick-borne diseases useful?
    There are vaccinations for dogs against certain Borrelia strains. The usefulness depends on the individual risk. A Impfung may be recommended, especially for hunting dogs or animals in high-risk areas. Talk to your veterinarian about the options.
  8. How long does it take for Symptoms: of illness to appear after a tick bite?
    The incubation period varies depending on the pathogen. In Borreliosis, Symptoms: typically appear after 1–4 weeks, in anaplasmosis after 1–2 weeks and in babesiosis after 10–21 days.
  9. Can tick-borne diseases be completely cured?
    With early diagnosis and adequate treatment, a complete cure is often possible. However, with delayed therapy, chronic damage can remain, especially in Borreliosis.
  10. Are certain dog or cat breeds more susceptible to tick infestations or tick-borne diseases?
    There are no clear breed-dependent predispositions for tick infestations. However, long-haired breeds can harbor more ticks that are more difficult to detect. Certain dog breeds such as Bernese Mountain Dogs, Golden Retrievers and Labrador Retrievers appear to be more susceptible to clinical manifestations of Borreliosis.

Literature

  1. Borreliosis (Lyme Borreliosis, Lyme disease, Lyme disease). In: Kohn B, Schwarz G, eds. Internship at the dog clinic. 12th, updated edition. Stuttgart: Enke Verlag; 2017
  2. Littmann, M P, B Gerber, R E Goldstern, M A Labato et al.: ACVIM consensus update on Lyme borreliosis in dogs and cats. J Vet Intern Med. May;32(3):887-903, 2018
  3. Löwe G, Löwe O. Emergencies in dogs and cats – A veterinary Guide. Kreuztal: Kynos-Verlag. 2021; 208 p.
  4. Straubinger RK, Pantchev N. Tick-borne infectious diseases in dogs: Current situation in Germany. Veterinary Practice Small Animals. 2020;48(2):132-144.
  5. Schreiber C, Krücken J, Beck S, Maaz D, Pachnicke S, Krieger K, et al. Pathogens in ticks collected from dogs in Berlin/Brandenburg, Germany. Parasites & Vectors. 2019;12(1):332.
  6. Littman MP, Gerber B, Goldstein RE, Labato MA, Lappin MR, Moore GE. ACVIM consensus update on Lyme borreliosis in dogs and cats. Journal of Veterinary Internal Medicine. 2018;32(3):887-903.
  7. Baneth G, Thamsborg SM, Otranto D, Guillot J, Blaga R, Deplazes P, et al. Major parasitic zoonoses associated with dogs and cats in Europe. Journal of Comparative Pathology. 2016;155(1):S54-S74.
  8. Otranto D, Dantas-Torres F, Breitschwerdt EB. Managing canine vector-borne diseases of zoonotic concern: part two. Trends in Parasitology. 2021;37(3):247-257.