(CBS DETROIT) – Test results have confirmed two Mexican gray wolf pups at Binder Park Zoo in Battle Creek have died from the deadly mosquito-borne virus known as Eastern equine encephalitis or EEE.

The pups died in early September.

READ MORE: MDOT Announces Ongoing Construction For I-75

“EEE is very, very rare in canines,” zoo officials said. “The zoo animals that are susceptible to EEE (zebras, Przewalski’s horses and ostriches) are vaccinated annually against EEE but there is no approved vaccine for canines.”

READ MORE: Lions Release LB Christian Jones, Re-Sign DB Mike Ford

Zoo officials said that the pups were part of a litter born to a breeding pair of Mexican gray wolves on June 14 at the zoo. The surviving wolf pup and both parents appear healthy and are being monitored closely by the veterinarian and animal care staff.

Fore more information visit here.

MORE NEWS: Smokin' Joe Frazier Celebrated With Statue, Mural In Philly

© 2019 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.