A day after he tangled with defender Giorgio Chiellini, Suarez was coping well, according to the Uruguay football federation president.
"Luis is fine. He's been through 1,001 battles," Wilmar Valdez told the online site Tenfield.com. "We all know who Luis is and that's why we have to defend him."
The bite just before Uruguay scored to eliminate the four-time champion Italians will now test FIFA president Sepp Blatter's often-stated commitment to "fair play, discipline, respect."
Blatter, who was in the crowd for the Uruguay-Italy match at Natal, has pledged zero tolerance for the darker side of the game. Many are questioning where that leaves a player like Suarez, who has a history of disciplinary problems, including separate bans of seven and 10 matches for biting opponents in the Netherlands and England.
Valdez said Uruguay officials were sent a video of the incident by FIFA, and would respond with footage showing Suarez a striker for Liverpool and last season's player of the year in England's Premier League as a victim of Italian aggression.
"When he falls, several substitutes insult him on the ground and some members of Italy's staff even came out of the bench to try to hit him," Valdez said, suggesting FIFA could investigate Italy.
Uruguay also will cite Brazil star Neymar getting only a yellow card in a clash with a Croatia player, Valdez said.
Uruguay federation board member Alejandro Balbi, who is Suarez's lawyer, blamed European media reporting.
"This happened because there have been campaigns launched by the media in England and Italy," Balbi told Uruguayan radio Sport 890.
Suarez's teammate Diego Lugano agreed.
"The British media has a vendetta against Suarez, and everyone knows that," he said. "It's obvious the vendetta sells newspapers in England, otherwise you wouldn't be here. Uruguay and Italy played yesterday. On Saturday, Uruguay plays Colombia. I don't know why there's a British journalist asking about Suarez."
Lugano said he had seen "much more violent plays" than the bite at the World Cup.
"It was a normal taunt in football, and the world press ends up talking about something totally trivial," he said.
FIFA's case against Suarez announced early Wednesday will be managed by a Swiss lawyer, Claudio Sulser, chairman of the FIFA disciplinary committee. A former international forward himself, Sulser has worked for four years at FIFA, first as head of its ethics court.