NEWBERG, Ore. -- A man who was arrested last Tuesday for sexual assault and for giving illegal tattoos may have infected students with an antibiotic-resistant strain of staph bacteria, police said.

Police said they were notified that at least two students had been treated for Methicillin-resistant Staphylococcus Aureus infections after receiving tattoos from 18-year-old Stephen Lister in his Newberg apartment.

According to the Centers for Disease Control, MRSA is an antibiotic resistant form of bacteria that can cause severe and potentially life-threatening infections on the skin and in the bloodstream.

Investigators said they think Lister was re-using ink when giving tattoos to at least 10 people inside his apartment, in the 2700 block of Haworth Avenue.

Lister's cell phone also contained 20 pictures of homemade tattoos and authorities are trying to track them all down.

We're concerned about more victims, said Capt. Jeff Kosmicki with the Newberg-Dundee Police Department. Of course we d love to have more folks come forward if they receive tattoos. The main thing is we want parents to get their kids checked out by a medical professional.

Detectives learned Lister allegedly had also been having sexual relations with underage students, Kosmicki said. Two 15-year-old girls confirmed those reports and Lister was arrested.

Lister was charged with eight sex abuse charges and 10 counts of performing services in a field of practice without a license. His bail was set at $150,000.

Anyone who received a tattoo from him was asked to call police at (503) 538-8321.

KGW reporter Jacqueline Sit contributed to this report.

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