A client brings you a hamster pup that is approximately 6 we…
A client brings you a hamster pup that is approximately 6 weeks old. She informs you that three other pups from the litter have already died. On examination you see that the hamster’s tail is “wet.” Due to the severity of illness and poor prognosis, the owners elect to euthanize and asks you to perform a necropsy. The necropsy findings include mucosal hyperplasia as shown below. What is the MOST likely etiologic agent responsible?