Fox Sports earlier reported that Nicks again had been diagnosed with MRSA, a staph infection that is resistant to some antibiotics.
"I will say that reports that you've heard are accurate, that this is a recurrence for Carl Nicks of the MRSA, in the same place, same location," Dominik said. "From everything we've been told and understand, this does happen, which is why MRSA is a bacteria that is hard to treat.
"But I would tell you that, in talking to the infectious disease specialist who's been treating Carl and working with us and working with other professionals, he also confirms and believes strongly that this is, obviously, the same infection that he's dealing with."
Nicks had already missed most of training camp while recovering from surgery on his left big toe when he was initially diagnosed with MRSA in late August.
Nicks sat out the remainder of the preseason, then missed the first two games of the regular season. He started the past two games against New England and Arizona.
Kicker Lawrence Tynes also was diagnosed with MRSA in the preseason and has been put on the non-football injury list. The NFL Players Association has filed a grievance against the Buccaneers in an effort to get Tynes on injured reserve, which would give him another accrued season and add to his retirement benefits.
The initial cases were confirmed while the Bucs were in New England holding joint practices with the Patriots before a preseason game. The team hired a company to sanitize One Buc Place, the team's headquarters and training facility, on two separate occasions in an effort to minimize the prospect of other cases.
The Bucs said at the time they did not know where Nicks and Tynes were exposed to MRSA.
Nicks, who signed with the Bucs as a free agent in 2012, was an All-Pro two years ago with the New Orleans Saints. He was listed on Thursday's injury report as "limited" in practice for the second straight day.
Earlier Thursday, coach Greg Schiano said the sixth-year pro had a problem with his left foot, but declined to give specific details.
Information from The Associated Press was used in this report.