Iosivas (thumb) was cleared to return to practice Thursday.
Carter compiled 10 tackles (two solo), an interception and a pass deflection during Cincinnati's win over the Falcons on Sunday.
Cook registered 10 tackles (five solo) during the Bengals' win over the Falcons on Sunday.
Slaughter (hamstring) was a full participant in Wednesday's practice, Teresa Varley of the Steelers' official site reports.
Dugger (quadriceps) didn't practice Wednesday, Adam Caplan of SiriusXM NFL Radio reports.
Echols (hamstring) was a full participant at practice Wednesday, Teresa Varley of the Steelers' official site reports.
Skowronek (calf) was a full participant in Wednesday's practice, Teresa Varley of the Steelers' official site reports.
Elliott (ankle) was a limited participant at practice Wednesday, Adam Caplan of SiriusXM NFL Radio reports.
Turner (ankle) was a limited participant in Wednesday's practice, Adam Caplan of SiriusXM NFL Radio reports.