Favaro replaces injured Esposito
This follows after Angelo Esposito saw his tournament hopes dashed by a shoulder injury.
Esposito, originally part of the 31-man squad named by coach Jacques Brunel last week, suffered the injury in Italy's record 7-48 defeat to Scotland last weekend.
It was the Italians' second consecutive defeat to the Scots after a 16-12 reverse in Turin two weeks ago.
The Italians have been drawn in a tough Pool D with France, Six Nations champions Ireland, Canada and Romania for the tournament which is being hosted by England and runs from September 18 to October 31.
Italy World Cup squad – revised:
Forwards: Matias Aguero, Martin Castrogiovanni, Dario Chistolini, Lorenzo Cittadini, Michele Rizzo, Leonardo Ghiraldini, Davide Giazzon, Andrea Manici, Valerio Barnabo, Joshua Furno, Marco Fuser, Quintin Geldenhuys, Mauro Bergamasco, Francesco Minto, Sergio Parisse (captain), Samuela Vunisa, Alessandro Zanni.
Backs: Carlo Canna, Edoardo Gori, Guglielmo Palazzani, Marcello Violi, Tommaso Allan, Tommaso Benvenuti, Michele Campagnaro, Simone Favaro, Gonzalo Garcia, Andrea Masi, Luke McLean, Luca Morisi, Leonardo Sarto, Giovanbattista Venditti.
Agence France-Presse
