The Humane Society of Huron Valley sent out a bulletin today, warning pet owners of a high volume of Parvovirus.

Humane Society officials say seven confirmed cases have occurred in the last week and half. The puppies were both strays and owned pets.

Canine parvovirus disease is currently the most common infectious disorder of dogs in the United States. It's a highly contagious disease characterized by diarrhea that is often bloody.

“This is a bit scary. It is definitely out of the ordinary, we might see seven cases over several months,” says Tanya Hilgendorf, executive director of HSHV. Parvovirus is often deadly for puppies because of their weaker immune system. Parvo initially attacks the digestive system, causing diarrhea, fever, vomiting, loss of appetite and lethargy. The symptoms can escalate to dehydration, shock and sudden death. Parvovirus is not transferable to humans. Adult dogs are less vulnerable to illness because they are more likely to be vaccinated and have stronger immune systems.

Dr. Meredith Mallory, the HSHV shelter veterinarian, says in a news release that owners must ensure their puppies follow a vaccination protocol. Even puppies that have been initially immunized are vulnerable because antibodies passed from a mother can interfere with the vaccination.

It's generally recommended that puppies get vaccinated every 3-4 weeks until they are 16 weeks old, then annually after that. For more information, call (734) 662-5585 or visit www.hshv.org.