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Ophthalmia Neonatorum (Neonatal Conjunctivitis) in Dogs

Occurrence: common
Location of illness: Head/Neck

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

Ophthalmia neonatorum is an infectiousInfectious describes the ability of a pathogen to be transmitted from one individual to another and trigger an infection. It also refers to diseases caused by such pathogens. conjunctivitis that occurs in newborn dogs. It is characterized by inflammation of the mucous membrane of the eye, often caused by bacterial or viralViral refers to viruses and their effects on the organism. Viral infections in dogs and cats can range from harmless colds to severe, life-threatening diseases. infections.

The most important facts at a glance

Ophthalmia neonatorum, a conjunctivitis in newborn dogs, usually occurs before the puppies’ eyes open between the 10th and 14th day of life. During this time, they are susceptible to infections because their eye surfaces are sensitive. 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 often caused by 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. such as Staphylococcus, Streptococcus, and Escherichia coli, which can be transmitted through the birth canal or contaminatedContaminated describes something that has been polluted by harmful microorganisms, chemicals, or other dangerous substances. In veterinary medicine, this can affect food, water, toys, or the environment. surfaces. Viruses such as CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Herpesvirus or Adenovirus can also play a role.

Typical symptoms include Conjunctival hyperemiaHyperemia refers to an increased blood volume in a body area, often as a reaction to inflammation or as a result of improved blood circulation. It can lead to redness and a feeling of warmth in the affected area., increased lacrimation, Eyelid margin crusting/adherence, and pus accumulations behind the closed eyelids. In severe cases, corneal ulcers can 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 and laboratory analysis of smears to identify the pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites..

The treatment aims to control 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. and usually includes antibiotic eye drops or ointments. Antiviral drugs can be used for viralViral refers to viruses and their effects on the organism. Viral infections in dogs and cats can range from harmless colds to severe, life-threatening diseases. infections. SupportiveSupportive refers to supportive treatments that aim to alleviate symptoms and improve quality of life without directly treating the underlying cause of the disease. measures such as cleaning the eyes with saline solution are helpful. 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 good if the disease is detected early; however, severe complications can lead to long-term damage.

Preventive measures include good hygiene during birth and health monitoring of the mother dog to avoid infections. Early detection of symptoms and rapid veterinary care are crucial to minimize the risk of complications.

Causes

The eyes of newborn dogs usually open between the 10th and 14th day of life. Before the eyelids open, the eye surfaces of the puppies are susceptible to infections. During this time, they rely on the antibodies they receive from their mother through the placentaThe placenta is an organ that develops in the uterus during pregnancy and provides the fetus with oxygen and nutrients via the umbilical cord. It also serves as a barrier to some infectious agents. or through colostrum to protect themselves against infections.

Ophthalmia neonatorum can be caused by various pathogenic microorganisms. One of the most common causes is 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. with 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. such as Staphylococcus, Streptococcus, and Escherichia coli. These 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. can be transmitted to the newborn through the birth canal or through contact with contaminatedContaminated describes something that has been polluted by harmful microorganisms, chemicals, or other dangerous substances. In veterinary medicine, this can affect food, water, toys, or the environment. surfaces or animals.

In addition to bacterial infections, viralViral refers to viruses and their effects on the organism. Viral infections in dogs and cats can range from harmless colds to severe, life-threatening diseases. infections, such as those caused by the CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Herpesvirus or the CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Adenovirus, can also play a role. These viruses can be transmitted during birth or through contact with infected dogs.

Symptoms

Very common symptoms:

Common symptoms:

Rare symptoms:

The symptoms of ophthalmia neonatorum can appear as early as a few days after birth. A common sign is Eyelid edemaAn edema is a buildup of fluid in the body’s tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition., which is often accompanied by redness and increased warmth. The eyelids may appear stuck together, and there may be an accumulation of yellowish or greenish pus.

In some cases, the eyelids of affected puppies do not open in time, leading to an accumulation of secretions behind the closed lids. This can lead to further irritation and possible damage to the cornea.

Left untreated, 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. can lead to more serious complications such as corneal ulcers or even loss of the eye. Therefore, it is important to recognize and treat the symptoms early.

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 ophthalmia neonatorum is usually based on the clinical examination of the affected puppies. A veterinarian will consider the symptoms and the animal’s medical 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 make an accurate 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..

To determine the exact cause 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., a swab can be taken from the affected eye surface and examined in the laboratory for the presence 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. or viruses. This analysis can help to identify the specific pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites. and enable targeted treatment.

In addition, an examination of the eye with a special dye such as fluorescein can be performed to visualize possible damage to the cornea. This method can help to assess the extent of the damage and determine the appropriate treatment strategy.

Therapy

The treatment of ophthalmia neonatorum aims to control 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. and relieve the symptoms. 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 used to combat the bacterial pathogens. This can be administered in the form of eye drops or eye ointments. The choice of antibiotic depends on the pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites. identified in the culture.

In cases where a viral infectionA viral infection occurs when a virus enters the body and infects healthy cells, which can lead to disease symptoms. The severity and type of symptoms can vary depending on the type of virus. is suspected, the veterinarian may prescribe antiviral drugs, although these are less commonly used in veterinary medicine. SupportiveSupportive refers to supportive treatments that aim to alleviate symptoms and improve quality of life without directly treating the underlying cause of the disease. measures such as cleaning the eyes with a sterile saline solution can also help to relieve symptoms and promote healing.

In severe cases or complications such as corneal ulcers, more intensive treatment may be required, possibly involving surgical procedures to preserve the integrity of the eye. Close monitoring by the veterinarian is crucial to ensure that the puppy’s condition improves.

Prognosis and follow-up care

The prognosis for puppies with ophthalmia neonatorum is generally good if the condition is recognized and treated early. Most puppies recover completely without permanent damage, especially 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 mild and treatment is initiated promptly.

In cases with severe complications or delayed 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. may be less favorable. Possible long-term consequences include scar tissue formation on the cornea or, in extreme cases, the loss of the eye, which can impair the quality of life of the affected animal.

Prevention

Preventive measures to avoid ophthalmia neonatorum include good hygiene during birth and in the first weeks of life of the puppies. The environment in which the puppies are born and raised should be clean and free of sources 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..

It is important that the mother dog is healthy and has no infections that could be transmitted to the puppies. Regular veterinary check-ups and vaccinations of the mother dog can help minimize the risk of transmission of infections to the offspring.

Early detection of symptoms and immediate veterinary care are crucial to prevent the progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. of the disease and ensure the health of the puppies. In some cases, it may be useful to administer prophylactic antibiotic eye drops to reduce the risk 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. in newborn puppies.