PARIS  Sixty years after the United Nations adopted the Universal Declaration of Human Rights, governments in scores of countries still torture or mistreat their people, Amnesty International said Wednesday in a report that again urged the United States to close down the Guantánamo Bay detention camp in Cuba.

In its annual report, the London-based human rights watchdog said “flashpoints” in Darfur, Zimbabwe, Gaza, Iraq/ and Myanmar “demand immediate action.”

“World leaders are in a state of denial but their failure to act has a high cost,” Irene Khan, the secretary general of Amnesty International, said in a statement accompanying the report. “As Iraq and Afghanistan show, human rights problems are not isolated tragedies, but are like viruses than can infect and spread rapidly, endangering all of us.”

The report singled out for criticism China, the United States, and Russia and accused the European Union of complicity in the rendition of terrorism suspects. The European Union, it said, must “set the same bar on human rights for its own members as it does for other countries.”