July 22, 2016
'Tis the season for Parvo, but Panleukopenia?
There has been a recent increase in canine Parvoviral enteritis cases presenting to the VMC. This seasonality and quantity has not changed, but we have been obtaining false negative point-of-care Parvo SNAP tests. We are gathering data to present to IDEXX to discuss this matter, but in the meantime we want you to be aware of this issue.
These dogs (all unvaccinated or incompletely vaccinated puppies) presented with typical symptoms of vomiting, diarrhea, loss of appetite with the more severe cases presenting in hypovolemic shock. Complete blood counts showed neutropenia, and Parvovirus -2 positive on fecal PCR. Because the results of the fecal PCR can take days to return, we want to alert you of this issue.
We will keep you informed if IDEXX has any comments about test errors or sampling methods. We want you to be aware of this issue so that if your instincts or concurrent lab data are suggestive of Parvoviral enteritis, continue to treat (24 hour care recommended) and take the necessary infectious disease control measures. A Fecal PCR is recommended.
Of other importance is a recent spike in feline Panleukopenia cases. We know of 3 kittens with this infection, all of which were obtained from different cat rescues in the Syracuse/Rome areas. The clinical signs of these kittens have been variable, from just diarrhea or loss of appetite to hypovolemic shock and sepsis.
These kittens have been testing positive on the point-of-care canine Parvo SNAP tests. While the source and extent of infected cases are unknown, we want you to be aware that the disease is within our geographical area and should remain on the differential diagnoses list for cats and kittens displaying associated signs. These cats have also been leukopenic on a complete blood count. Panleukopenia positive cats should be treated as recommended (24 hour care recommended), and the necessary infection control measures taken.
We will keep you apprised of the IDEXX Parvo SNAP issue. Thanks!
PS - If you have Parvo SNAP negative cases with a confirmed PCR positive, I would be interested to have that data to also present to IDEXX. Please forward your information to Luschini@vmccny.com. Thanks!