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Otitis Media (Middle Ear Infection) in Dogs

Occurrence: common
Location of illness: Head/Neck

Author: Dr. med. vet. Gisa Löwe | Last modified: 06.11.2025

Otitis media, also known as middle ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., is an inflammatory condition of the middle ear in dogs that can be caused by infections, injuries, or other causes.

BASICS/CAUSES:

The middle ear is the section of the ear located behind the eardrum. It contains small bones that transmit sound waves from the eardrum to the inner ear. In otitis media, this region becomes inflamed, often accompanied by fluid accumulation.

The most common cause of otitis media in dogs is a bacterial infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., often secondary to an infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. of the external ear canal (otitis externa). These infections can be caused by various types of bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., including staphylococci and Pseudomonas.

Another possible cause is fungal infections, which can also migrate from the external ear canal to the middle ear. Injuries to the eardrum caused by foreign bodies, traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., or as a result of intensive cleaning can also pave the way for pathogens to enter the middle ear.

Systemic diseases or allergies can also play a role in the development of otitis media, as they weaken the dog’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. and increase susceptibility to infections. In rare cases, Tumors or polyps in the ear area can lead to a blockage of the Eustachian tube, leading to fluid accumulation in the middle ear and subsequent inflammation.

The most important facts at a glance

Otitis media in dogs is a middle ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. often caused by infections from the outer ear, foreign bodies or water in the ear, allergies, or anatomical features that hinder ventilation of the middle ear. The most common symptoms are Pain, Fever, Hearing loss, foul-smelling ear discharge, and Pain when touching the ear. Dizziness and, less commonly, weakness and Balance disorders may also occur. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made by clinical examination, otoscopyOtoscopy is an examination of the ear canal and eardrum using an otoscope. It is performed to diagnose ear conditions, such as infections or foreign bodies., and possibly X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. or CT scans. A culture of the ear secretions can help identify the pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites. and determine the correct antibiotic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions.. Treatment depends on the cause and may include antibiotics, anti-inflammatory drugsAnti-inflammatory drugs are medications that reduce inflammation. They can be divided into nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids and are used in dogs and cats to reduce Inflammatory conditions and Pain., or surgery. Preventive measures include good ear hygiene and regular veterinary check-ups. Research focuses on the causes and treatment, including the development of new antibiotics and minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. surgical techniques. A balanced diet and avoiding allergens can also help. With early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is generally good, but delays can lead to complications such as permanent Hearing loss.

Causes

Spread of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. from the outer ear.
PenetrationPenetration describes the entry or permeation of a substance or organism into a body or material. In medicine, it can refer to the penetration of microorganisms into tissues or the insertion of instruments into the body. of foreign bodies or water into the ear.
Allergies that lead to Inflammatory conditions.
Anatomical features that hinder ventilation of the middle ear.

Symptoms

Very common symptoms:

Common symptoms:

Dizziness

Rare symptoms:

A common symptom of otitis media in dogs is persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. Head shaking or Scratching the ear. Dogs may also tilt their head to the side, especially on the affected side.

Another sign is pain sensitivity in the area of the ear, which can manifest as Sensitivity to touch or defensive behavior when trying to examine the ear. Balance disorders or an unsteady gait can also indicate otitis media, as the middle ear is also responsible for balance.

There may be reduced hearing ability on the affected side. In some cases, a foul-smelling Discharge from the ear also occurs, which may indicate a bacterial infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..

Severe cases can cause neurological symptoms such as nystagmus (uncontrolled eye movements) or facial paralysisParalysis is the complete loss of muscle activity in one or more areas of the body, which can lead to immobility and loss of sensation. Paralysis can be caused by injuries, illnesses, or disorders of the nervous system. if the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. spreads to adjacent structures.

Diagnosis

The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of otitis media often begins with a thorough clinical examination by the veterinarian, including a complete historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. to record the symptoms and possible triggers.

An otoscopyOtoscopy is an examination of the ear canal and eardrum using an otoscope. It is performed to diagnose ear conditions, such as infections or foreign bodies., in which the ear is examined with a special instrument, is often the first step in assessing the condition of the eardrum and external ear canal. The veterinarian will look for signs of redness, Swelling, or Discharge from the ear.

If the eardrum is intact, an X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. or CT scan may be necessary to look more closely at the middle ear. These imaging procedures can help detect fluid accumulation, bone changes, or Tumors.

A culture and sensitivity test of samples from the ear can be performed to identify the exact pathogens and determine the most appropriate antibiotic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions.. If a systemic disease or allergyAn allergy is an overreaction of the immune system to a normally harmless substance, the allergen. The reaction can include symptoms such as skin rash, itching, sneezing, respiratory distress, or in severe cases, anaphylactic shock. is suspected, additional blood tests or allergyAn allergy is an overreaction of the immune system to a normally harmless substance, the allergen. The reaction can include symptoms such as skin rash, itching, sneezing, respiratory distress, or in severe cases, anaphylactic shock. tests may be required.

Therapy

The treatment of otitis media in dogs depends on the underlying cause. In most cases, antibiotic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. is prescribed, tailored to the specific pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites. identified by the culture. This therapy can take several weeks to ensure that the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is completely eliminated.

If fungal infections are the cause, antifungalAntifungal means effective against fungal infections. Antifungal medications are used to treat infections caused by fungi by inhibiting their growth or reproduction, or by killing them. medications are administered. In cases where a foreign body or a tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. is the cause, surgery may be required to eliminate the problem.

Anti-inflammatory drugsAnti-inflammatory drugs are medications that reduce inflammation. They can be divided into nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids and are used in dogs and cats to reduce Inflammatory conditions and Pain. may be prescribed to relieve Swelling and Pain. In some cases, flushing of the middle ear may also be necessary to remove excess fluid or pus.

The therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. can be supplemented by regular check-ups to monitor the healing progress and adjust the treatment if necessary. Close cooperation with the veterinarian is crucial for the success of the treatment.

Prognosis and follow-up care

The prognosis for dogs with otitis media depends on the severity of the disease and the underlying cause. With early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and appropriate treatment, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is usually good, and many dogs recover completely.

However, if the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is severe or the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment are delayed, complications such as permanent Hearing loss or neurological damage may occur. In such cases, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. may be more cautious.

In the presence of Tumors or polyps, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. may vary depending on the type and extent of the Tumors. However, timely and targeted treatment usually improves the chances of a successful recovery.

Prevention

Preventive measures to avoid otitis media in dogs include good ear hygiene and regular check-ups by the veterinarian. Cleaning solutions specifically formulated for dog ears can help remove excessive earwax and dirt that could promote infections.

Regular examinations of the ear by the veterinarian can detect early signs of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. before they develop into otitis media. This is especially important in dogs that are prone to Ear infections, such as dogs with long, drooping ears or those with allergies.

Dogs should be protected from foreign bodies in the ear, for example by not playing in areas with high grass seed growth. If signs of ear problems occur, a veterinarian should be consulted immediately to minimize the risk of the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. spreading to the middle ear.

Outlook on current research

In current research on otitis media in dogs, there is a particular focus on identifying the underlying causes and developing more effective treatment strategies. Advances in molecular diagnostics make it possible to identify specific bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. and fungi that cause middle Ear infections more quickly and precisely. This leads to more targeted treatment approaches that are better tailored to the individual needs of the dog.

Another focus of the research is the investigation of genetic predispositions for the development of otitis media. Certain breeds are more susceptible to middle Ear infections, which may indicate genetic factors. Researchers are working to identify the genetic markers associated with an increased risk of this disease. These findings could lead to preventive measures in the future to provide early support for particularly at-risk dogs.

The development of new antibiotics and antifungals is also an important area of research. As antibiotic resistanceResistance refers to the ability of microorganisms to withstand the effects of antibiotics, antifungals, or other antimicrobial drugs. Resistance can also refer to the body's ability to be insensitive to diseases or toxins. increases in bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. that cause otitis media, scientists are looking for new classes of drugs that are more effective and gentler on the dog. The exploration of probiotic treatments that support the balance of the microflora in the ear is also being considered as a promising option.

In surgery, there are advances in minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. techniques for treating chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. middle Ear infections. These procedures aim to shorten recovery time and minimize stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. on the dog. At the same time, work is being done to improve imaging diagnostics in order to enable a more accurate assessment of the severity of the inflammation.

In addition, the effects of nutrition on the health of the ear canal are being investigated. Some studies suggest that a balanced diet can strengthen the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. and reduce susceptibility to infections. Omega-3 fatty acids and other dietary supplements are being tested for their potential anti-inflammatory effects, which promises long-term benefits for dogs with recurrentRecurrent refers to a disease that repeatedly returns or worsens after a temporary remission or improvement. middle Ear infections.

Finally, the role of environmental management in the preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. and treatment of otitis media is being explored. This includes measures to improve indoor air quality, avoid allergens, and regularly clean the ear canal. These holistic approaches, combined with medical treatments, could significantly improve the quality of life for dogs with middle Ear infections.

Frequently asked questions (FAQs)

What is otitis media in dogs? Otitis media is an inflammatory condition of the middle ear that can be caused in dogs by various causes such as infections, allergies or foreign bodies. It can cause Pain, Head shaking and Balance disorders.
How do I know if my dog has a middle ear infection? Signs of a middle ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. in dogs include frequent Head shaking, Scratching ears, unpleasant odor from the ear, Balance disorders and, in severe cases, Numbness. If you notice these symptoms, you should see a veterinarian immediately.
What causes otitis media in dogs? Common causes include bacterial or fungal infections, allergies, parasites, and foreign bodies in the ear. Anatomical features, such as narrow ear canals, can also increase the risk.
How is otitis media treated? Treatment depends on the cause of the inflammation. It may include administering antibiotics or antifungals, removing foreign bodies, or treating allergies. In severe cases, surgical intervention may be necessary.
Can I treat otitis media in my dog at home? Self-treatment is not recommended as the correct diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment are crucial. Incorrect treatments can make the situation worse. A visit to the vet is essential.
Is otitis media contagiousContagious means infectious. Diseases that can easily be transmitted from one animal to another or from animals to humans are referred to as contagious. in dogs? Otitis media itself is not contagiousContagious means infectious. Diseases that can easily be transmitted from one animal to another or from animals to humans are referred to as contagious., but the bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. or fungi that cause the inflammation can spread under certain conditions. Good hygiene and regular ear checks can help prevent this.
How can I prevent otitis media in my dog? Regular cleaning of the ears, avoiding allergens and a balanced diet can help reduce the risk. Regular check-ups by the veterinarian are particularly important for dogs that are prone to Ear infections.
Which dogs are most often affected by otitis media? Dogs with long, drooping ears such as Cocker Spaniels or Basset Hounds as well as breeds with narrow ear canals are more frequently affected. Dogs with allergies also have an increased risk.
Can a middle ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. lead to Taubheit? Yes, untreated or chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. middle Ear infections can cause permanent damage to hearing and, in severe cases, lead to Taubheit. Early treatment is therefore crucial.
How long does the treatment for otitis media in dogs last? The duration of treatment depends on the severity of the inflammation and the cause. Treatment can usually take several weeks; in chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. cases, long-term therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. may be necessary.