Canine Distemper (CDV)
Canine distemper virus (CDV) is a multisystemic infection that can present with respiratory, gastrointestinal, or neurological signs. Quantitative CDV antigen testing supports confirmation of active infection, while CDV antibody testing supports assessment of vaccine-induced immunity. Point-of-care quantitative testing is valuable because it reports viral antigen concentration rather than a simple positive/negative result.
Fact Table
Clinical Context
Canine distemper virus (CDV) is a multisystemic infection that can present with respiratory, gastrointestinal, or neurological signs. Quantitative CDV antigen testing supports confirmation of active infection, while CDV antibody testing supports assessment of vaccine-induced immunity. Point-of-care quantitative testing is valuable because it reports viral antigen concentration rather than a simple positive/negative result.
Interpretation should combine the quantitative result with the patient's signalment, history, clinical signs, vaccination or treatment history where relevant, and any other laboratory findings. A single value is rarely diagnostic on its own; serial measurements often provide more useful information.
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Related Test Kits
Related Articles
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- Antigen vs Antibody Tests in Pets: Which One Answers Antigen tests detect the pathogen; antibody tests detect the immune response. Here's the two-question framework that prevents the common mistake.
Clinical literature cited in related articles
2026-09-12
MEDIUM
FAQ
What is the difference between CDV antigen and antibody testing?
An antigen test detects the distemper virus itself and indicates active infection, whereas an antibody test measures the immune response and is useful for assessing vaccination status or past exposure. Antigen testing is preferred for diagnosing an acutely ill dog.
When should a dog be tested for distemper?
Testing is indicated when a dog shows respiratory signs (fever, nasal/ocular discharge, cough), gastrointestinal signs, or neurological signs (seizures, twitching), especially in unvaccinated puppies or dogs with unknown vaccine history.
Why is quantitative CDV testing valuable?
Quantitative fluorescence testing reports viral antigen concentration rather than a simple positive/negative, helping clinicians assess viral load, monitor disease progression, and evaluate treatment response.