Health officials say they are seeing more cases of a nasty skin infection caused by a common bacteria traced to the ink. Nineteen people in Rochester ended up with rashes on new tattoos.

A report on this outbreak was published Wednesday by the New England Journal of Medicine. These infections were caused by bacteria common in tap water.

In the past year, more than 50 confirmed or suspected cases were linked to tattoo ink or water used to dilute the ink. Health officials say tattoo artists and ink makers should only use sterile water.