She won in a run-off against former Sao Paulo governor Jose Serra with 55.9% of the votes.
FORBES: Names You Need to Know in 2011: Dilma Rousseff
2.
The result meant Ms Rousseff faced the second-placed candidate, Sao Paolo mayor Jose Serra of the main opposition Social Democracy party, in a run-off vote on 31 October.
BBC: Brazil country profile
3.
Among those sacked are Rosemary de Noronha, who heads the regional office of the presidency in Brazil's largest city, Sao Paulo, and Deputy Attorney General, Jose Weber Holanda.
BBC: Brazil dismisses officials over corruption allegations