In the world of infectious diseases, one worrisome phenomenon is when an illness that originated in animals jumps over into people.┬áThe process — known as zoonosis — is not uncommon and keeps researchers on their toes as they look for signs that an animal-borne disease might make inroads into the human population.

A new report focuses on just such a development — and the culprits in this case were guinea pigs. More specifically, they were guinea pigs infected with a bacteria known as Streptococcus equi subspecies zooepidemicus.