Branch is dealing with a lingering neck injury, but more worrisome is an ankle injury suffered in last Thursday's game against the Denver Broncos. Branch had six tackles before leaving in the first half and never returning.
Bilukidi, a rookie out of Georgia State, was sick on Wednesday.
More comforting news for the Raiders, who play the Kansas City Chiefs on Sunday, is the status of defensive tackle Richard Seymour, who has been on injury report for weeks and hasn't played since the Nov. 4 game against the Tampa Bay Buccaneers. His status was upgraded to limited participation after sitting out with knee and hamstring issues.
Also limited on Wednesday were tackle Khalif Barnes (triceps), defensive end Jack Crawford (toe), defensive back Michael Huff (wrist) and safety Mike Mitchell (neck).
Running back Darren McFadden was included on the injury report as a full participant because of his ankle injury. He re-injured what was a high ankle sprain but returned to practice this week.