Respiratory infection breakout in dogs.

Suspect new bacterial agent, possibly combining with a virus.

There has been an uptick in the numbers of dogs with respiratory disease, (coughing, lethargy, fever) and the signs have been persisting longer than a few days,” said Kevin Snekvik, the laboratory’s executive director and a professor at the Washington State University College of Veterinary Medicine

Snekvik said his Washington lab has not reported any canine deaths from the mystifying disease, but said labs in other states have reported a few deaths.

What can dog owners do?

While the news may be concerning, “We suggest caution rather than worry,” the Oregon Veterinary Medical Association’s website says.

While this particular disease is unusual, “Periodic outbreaks of Canine Infectious Respiratory Disease Complex (CIRDC) can occur in a dog population. At least nine different bacteria and viruses have been linked as causes of CIRDC, which is transmitted by respiratory droplets,” the association said.

“Infection with more than one bacterial or viral agent is common. Symptoms include coughing, sneezing, nasal and/or eye discharge, and lethargy. If your dog shows these symptoms, please contact your veterinarian.”

Dog owners should help keep their pets healthy by making sure they’re up-to-date on all vaccines, such as those for canine influenza, Bordetella and parainfluenza, the association said. Other tips include:

• Reducing contact with large numbers of unknown dogs. Just like with other respiratory pathogens, the more contacts your dog has, the greater the risk of encountering a dog that’s infectious.

• Reducing contact with sick dogs. This can be harder to determine but if a dog looks sick (coughing, runny nose, runny eyes), keep your dog away from it.

• Keep sick dogs at home and seek veterinary care.

• Avoid communal water bowls shared by multiple dogs.