UPDATE 3-Brazil confident on world trade deal

(recasts, adding U.S. comments)

By Raymond Colitt

BRASILIA, May 31 (Reuters) - Senior officials from Brazil and the United States, adversaries in trade talks, voiced optimism on Thursday that negotiations on a global trade deal were gathering momentum despite remaining divisions.

Brazil's foreign minister said he was "rather confident" a accord could be reached in coming weeks and said his country was prepared to improve a tariff offer on manufactured goods.

"I see the negotiators are becoming nervous and that is a sign something may happen," Celso Amorim told Reuters in Brasilia.

"It's a positive nervousness, they are making phone calls almost every other day, there are a number of meetings."

In Washington, outgoing U.S. farm negotiator Richard Crowder said talks in the so-called Doha round were moving in the right direction.

"There is a restlessness that people tell me exists in Geneva among a lot of countries ... I think that it's important that it does move quickly. We don't have forever," Crowder told Reuters on his last day on the job.

The Doha round was launched more than five years ago and aims to boost the global economy and lift millions from poverty. But deep differences, mainly over farm trade, have meant the negotiators have missed deadline after deadline.