Michigan officials investigating ‘Parvo-like’ illness that sickened, killed dozens of dogs: What to know

State and federal agencies are investigating an illness that has sickened and killed dozens of dogs in Otsego County after they showed signs of a “parvo-like” illness. Some of the tests from sick or dead dogs have come back positive for canine parvovirus, a highly contagious virus that can affect all dogs. Michigan State University is encouraging veterinarians to pursue additional tests in cases where screening tests for parvovirus are negative.