In response to growing calls for Uefa to boycott the next World Cup and demands that Fifa reruns the vote to pick the host nations for the 2018 and 2022 tournaments, Blatter accused the "English media and the American movement" of conspiring against him.
Facing the press for the first time since his re-election, he paved the way for a continued battle of wills with Uefa president Michel Platini, who last week urged him to resign. In an ominous warning of future relations he stated: "I forgive but I do not forget when it comes to persons."
Blatter's scarcely veiled threats came at the end of a week in which 14 Fifa officials, including seven of the organisation's most senior figures, were arrested as part of criminal investigations into bribes totalling US$150 million ($210 million).
The FBI said it had uncovered 24 years of "brazen corruption ... undisclosed illegal payments, kickbacks and bribes" by Fifa officials, and that corruption in the organisation was "rampant, systemic and deep-rooted".
The US inquiry alleges South Africa was awarded the 2010 World Cup as a result of bribery, with the head of its IRS Criminal Investigations division accusing Fifa of running a "World Cup of fraud".
The Swiss authorities also announced a criminal inquiry into the decisions to award the 2018 and 2022 World Cups to Russia and Qatar.
But in a show of brazen defiance, Blatter maintained he had the support of the international football community and was the only man capable of restoring football's image.
"All of these events that have taken place, culminating in the police storming the Zurich hotel - and curiously enough there were already American journalists present at the time - this storm has not passed, but it has not become a hurricane at this time.
"We will work with our institutions and our bodies, and that way we will avoid future situations where there are surprises that catch us on the back foot."
Blatter denied any knowledge of one of the most serious single allegations - that US$10 million was paid in bribes to the disgraced former vice-president of the organisation, Jack Warner, by a senior Fifa official.
Asked by journalists if he feared the consequences of the US investigation, he said: " I have no concerns. I especially have no concerns about my person."