SNAP® Parvo Test
A definitive diagnosis provides clinical confidence
The SNAP® Parvo Test has been shown not to cross-react with modified live vaccines*—so you can have confidence in the accuracy of your diagnosis and the treatment decisions you make. Early and definitive identification of canine parvovirus allows for timely and appropriate treatment.
Study conducted using modified live vaccines only. Killed vaccines do not replicate in the gastrointestinal epithelial cells. Data on file at IDEXX Laboratories.
Early detection for timely treatment
- Pet–side results in 8 minutes
- 5 tests per package
- Room temperature storage
Sensitivity and specificity of the SNAP® Parvo Test
Parvo Vaccine Cross-reactivity—In a recent study conducted by the University of Wisconsin, of 64 dogs vaccinated with six different modified live CPV-2 vaccines, the SNAP Parvo Test did not detect CPV-2 in their feces:1
Resources and support materials for the SNAP® Parvo Test
It’s easy to use the SNAP Parvo Test:
View the package insert (PDF) for detailed instructions.
Color development in the sample spot that is darker than the negative control indicates a positive result, and the presence of parvovirus antigen in the sample.
Color development only in the positive control spot indicates a negative result.
Questions and answers about the SNAP® Parvo Test
No. The swab collection device is intended for use on external fecal samples only.
The SNAP Parvo Test, and any other SNAP® test, must be used within two hours of removing it from the foil package.
In a recent study conducted by the University of Wisconsin, of 64 dogs vaccinated with six different modified live CPV–2 vaccines, the SNAP® Parvovirus Antigen Test did not detect CPV–2 in their feces.1
Read abstract > (PDF)
You have indicated before that the SNAP Parvo Test may cross react 4–15 days post vaccination. Why is the information different now?
The information we derived from studies performed in the 1990s did indicate that there may be a potential interference with vaccinated canines 4–15 days post vaccination with other available assays. However, this recent University of Wisconsin study has shown that the SNAP® Parvo Test does not detect CPV-2 in canine feces.
The SNAP Parvo Test detects these strains: CPV-1, CPV-2, CPV-2a, CPV-2b and CPV-2c.
- A recent abstract published (PDF) at the 2007 Conference for Research Workers in Animal Disease by Dr. Ron Schultz of the University of Wisconsin has shown that the SNAP Parvo Test does detect CPV-2c.
- CPV-2c is an emerging strain of the canine parvovirus that has only recently been introduced into the United States (2004–2005), most likely from Europe, where it has been since 2001.
- IDEXX continues to conduct studies to determine the sensitivity and specificity of the SNAP Parvo Test with this strain.
IDEXX doesn’t have the data to support the results of samples taken from a deceased dog. Our validation studies were performed with samples from live dogs.
IDEXX doesn’t have the data to support these results as our validation studies were performed with canine samples only
IDEXX doesn’t have the data to support these results as our validation studies were performed with canine fecal samples only.
No. The SNAP Parvo Tests are very specific for canine parvovirus (CPV); there is no cross–reaction with other enteric pathogens.
The dog may have been past its “shed window.”
Alternatively, the animal may have another condition that causes symptoms similar to that of parvovirus (e.g., fecal parasites, “garbage can” enteritis, canine coronavirus, and canine distemper).
The sensitivity and specificity of the SNAP Parvo Test for the population tested are:
- Sensitivity = 100%
- Specificity = 100%
As compared to Probe Test:
- Sensitivity = 100%
- Specificity = 98%
Sensitivity and Specificity of the SNAP Parvo Test
Yes. If the sample and conjugate are incubated together for too long (length of time depends on how much antigen is present in sample), the conjugate can bind together all the antigen present and result in a false negative. Because the antigen is all bound to the conjugate, no antigen is able to bind to the solid phase as it flows past.
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