Front-row Reggie Corrigan has been added to the lengthy Irish casualty list after suffering a suspected broken wrist during the Italian win.
But fly-half Ronan O'Gara has been included in the squad despite missing out at the Stadio Flaminio through injury.
O'Sullivan and his fellow selectors will trim the squad to 22 players following the get-together and will name the team to play France on Tuesday, March 4.
Ireland training squad:
Forwards: S Best (Ulster), J Fitzpatrick (Ulster), J Hayes (Munster), M Horan (Munster), S Byrne (Leinster), F Sheahan (Munster), L Cullen (Leinster), G Longwell (Ulster). D O'Callaghan (Munster), M O'Kelly (Leinster), V Costello (Leinster), S Easterby (Llanelli), A Foley (Munster), K Gleeson (Leinster), E Miller (Leinster), A Quinlan (Munster).
Backs: G Easterby (Llanelli), P Stringer (Munster), P Burke (Harlequins), D Humphreys (Ulster), R O'Gara (Munster), R Henderson (Munster), K Maggs (Bath), B O'Driscoll (Leinster), D Quinlan (Leinster) J Staunton (Munster), G D'Arcy (Leinster), D Hickie (Leinster), S Horgan (Leinster) J Kelly (Munster), J Topping (Ulster), G Dempsey (Leinster), G Murphy (Leicester).
Not considered due to injury: J Bell (Ulster, shoulder), J Bishop (London Irish, finger), E Byrne (Leinster, calf), R Corrigan Leinster, wrist), P O'Connell (Munster, thumb), D Wallace (Munster, shoulder), P Wallace (Leinster, shoulder), K Wood (Harlequins, shoulder).