Officials in the U.K. have reported the first ever confirmed case of humans contracting tuberculosis from cats.

Public Health England reported that the two human cases are linked to nine cases of infection in cats. PHE reports that the two human patients have been responding well to treatment.

Veterinarians believe the cats likely contracted the disease from badgers or from rodents that had been inside badger setts.

“We’ve all become rather complacent because we haven’t been seeing TB for so many years but bovis is back with a little bit more significance,” Professor Danielle Gunn-Moore, a feline researcher, told the Daily Telegraph.  “It’s important we don’t get blinkered and think it’s only badgers and cattle that get infected. This is a bacteria that is not very fussy about who it infects.”

PHE reports at least 39 people have been in close contact with the infected cats and are being monitored by health officials.