Canine Infectious Diseases: Testing for Ehrlichia, Influenza & Coronavirus in Dogs at Home
Ehrlichia, canine influenza, canine coronavirus, and canine adenovirus are serious infectious diseases in dogs that can progress rapidly without early detection. Rapid at-home test kits allow dog owners and breeders to screen for these infections within minutes, enabling quicker veterinary intervention and helping to prevent spread within multi-dog households or kennels.
Why Early Detection of Canine Infections Matters
Dogs cannot tell us when they feel unwell. By the time symptoms become obvious, infections may already be advanced. Rapid testing offers three key advantages:
- Faster treatment: Early diagnosis allows your vet to start targeted treatment sooner, improving outcomes
- Infection control: Knowing which disease your dog has helps prevent exposure to other dogs (in kennels, dog parks, or multi-dog homes)
- Peace of mind: A negative result is reassuring and can rule out serious diseases as the cause of mild symptoms
Canine Ehrlichia: The Tick-Borne Silent Threat
Ehrlichiosis is caused by Ehrlichia canis, a bacterium transmitted by the brown dog tick (Rhipicephalus sanguineus). It is one of the most common and dangerous tick-borne diseases in dogs worldwide.
There are three phases of ehrlichiosis:
- Acute phase (1-4 weeks after tick bite): Fever, lethargy, loss of appetite, swollen lymph nodes, eye and nasal discharge
- Subclinical phase (months to years): No visible symptoms, but bacteria persist in the spleen – the dog appears healthy while the disease progresses
- Chronic phase: Severe weight loss, bleeding disorders, neurological signs, bone marrow failure – potentially fatal
The danger of ehrlichiosis lies in the subclinical phase – dogs look healthy but the disease is progressing silently. Early antibody testing after tick exposure is the only way to detect infection before severe damage occurs.
The Canine Ehrlichia Antibody Test detects IgG and IgM antibodies against E. canis in a blood sample. It is recommended for dogs that live in tick-endemic areas, travel to southern Europe, or have had known tick exposure.
Canine Influenza: The Dog Flu
Canine influenza virus (CIV) causes highly contagious respiratory illness in dogs. Two strains are currently circulating: H3N8 and H3N2. Unlike human influenza, dogs have no natural immunity to canine flu, meaning virtually all exposed dogs will become infected.
Symptoms include:
- Persistent cough (the most common sign)
- Nasal and eye discharge
- Fever (often 39.5-41°C)
- Lethargy and reduced appetite
- In severe cases: pneumonia, laboured breathing
Canine flu spreads through respiratory secretions and is particularly dangerous in kennels, dog shelters, and dog shows where many animals are in close proximity. The Canine Influenza Virus Antigen Test detects the virus directly from a nasal or throat swab, providing results within minutes – critical for outbreak management in kennels.
Canine Coronavirus: Not the Same as Human COVID-19
Canine coronavirus (CCoV) is an enteric coronavirus – meaning it primarily affects the digestive system, not the respiratory tract. It is not the same virus as SARS-CoV-2 and does not transmit to humans. CCoV spreads via contact with infected faeces and is most dangerous in young puppies and immunocompromised dogs.
Symptoms include:
- Sudden onset of watery or soft diarrhoea
- Loss of appetite and mild lethargy
- Vomiting
- In severe cases (especially puppies): dehydration and life-threatening illness when combined with parvovirus
The Canine Coronavirus Antigen Test is particularly valuable in kennel environments and breeders where multiple puppies or dogs are kept together.
Canine Adenovirus: Hepatitis and Respiratory Disease
There are two types of canine adenovirus:
- CAV-1 (Canine Adenovirus Type 1): Causes infectious canine hepatitis – a potentially fatal liver disease
- CAV-2 (Canine Adenovirus Type 2): A major component of kennel cough (infectious tracheobronchitis)
Vaccination protects against CAV-1 and CAV-2 in most countries, but unvaccinated dogs or dogs with waning immunity remain at risk. The Canine Adenovirus Antigen Test helps confirm adenovirus as the cause of respiratory or hepatic symptoms.
At-Home Dog Diagnostic Tests: When to Test
| Disease | Test | When to Test |
|---|---|---|
| Ehrlichiosis | Canine Ehrlichia Antibody Test | After tick exposure, travel to endemic regions, unexplained lethargy or fever |
| Canine Influenza | Canine Influenza Virus Antigen Test | Coughing, nasal discharge, suspected kennel cough outbreak |
| Canine Coronavirus | Canine Coronavirus Antigen Test | Acute diarrhoea in puppies or adults, especially in multi-dog environments |
| Canine Adenovirus | Canine Adenovirus Antigen Test | Persistent cough, kennel cough symptoms, suspected hepatitis in unvaccinated dogs |
How to Use At-Home Dog Rapid Tests
All of these rapid tests work similarly to human rapid antigen or antibody tests. You collect a sample (blood for antibody tests like ehrlichia, or a swab for antigen tests), apply it to the test cassette, add the provided buffer solution, and read results within 5-10 minutes. Always consult your veterinarian with the results – a positive test guides treatment, and even a negative test may require follow-up if symptoms persist.
FAQ
Can dogs get ehrlichiosis in Northern Europe?
Ehrlichiosis risk is highest in southern Europe (Mediterranean countries), the Americas, Africa, and Asia. In northern Europe, risk is lower but increasing with climate change extending tick habitat. Dogs travelling to or imported from southern European countries are at particular risk.
Is canine coronavirus the same as COVID-19?
No. Canine coronavirus (CCoV) is a completely different virus from SARS-CoV-2 (the cause of COVID-19). CCoV only affects dogs and causes gastroenteritis, not respiratory illness. It does not transmit to humans.
My dog was vaccinated against hepatitis – do I still need to test for adenovirus?
Vaccination provides excellent protection against CAV-1 (hepatitis) and CAV-2. However, vaccines can wane, puppies may not yet be fully protected, and not all dogs are vaccinated. The Canine Adenovirus Antigen Test is useful for unvaccinated dogs or when symptoms suggest adenovirus despite vaccination.
How accurate are at-home dog rapid tests?
Veterinary rapid tests are designed to meet diagnostic standards for sensitivity and specificity. They are the same technology used in veterinary clinics. Accuracy is best when samples are collected correctly and tests are performed fresh. Consult your vet if results are unclear or if clinical symptoms are severe.
Can I test my dog myself, or do I need a vet?
The tests are designed for use by dog owners and breeders as screening tools. However, a positive result should always be followed up with your veterinarian for confirmation and treatment. Rapid tests are a first-line screening tool, not a replacement for veterinary diagnosis.
How do I prevent these infections in my dog?
Vaccination: keep up to date with core vaccines (including hepatitis/adenovirus). Tick prevention: use veterinarian-recommended tick preventatives year-round, especially in high-risk areas. Hygiene: clean kennels and shared spaces regularly. Quarantine: isolate new or sick dogs from the rest of the group in kennels and multi-dog homes.
Protect your dog’s health. View all pet diagnostic tests at The Tester and be prepared for the unexpected.
