LONDON (Agencies) - WikiLeaks founder Julian Assange said Tuesday the Swedish women who have accused him of sexual assault had got into a tizzy about the possibility they had caught a sexually transmitted disease from him. Assange told the BBC that he was fighting a Swedish extradition warrant because he believes no natural justice would occur in Sweden. There are some serious problems with the Swedish prosecution, he said in the interview from the mansion of a wealthy supporter in eastern England where he must stay as part of his bail conditions. Sweden wants Britain to extradite the 39-year-old Australian to face questioning over allegations from two women that he raped one of them and sexually assaulted the other in Stockholm in August. Assange claimed that the Swedish authorities had asked that his Swedish lawyer be gagged, adding that his offers to be interviewed by video link or by Swedish officials in Britain had been rejected. I dont need to be at the beck and call of people making allegations, he said. I dont need to go back to Sweden. The law says I... have certain rights, and these rights mean that I do not need to speak to random prosecutors around the world who simply want to have a chat, and wont do it in any other standard way. WikiLeaks has enraged Washington by releasing thousands of US diplomatic cables and US Vice President Joe Biden described Assange as a hi-tech terrorist. US officials are believed to be considering how to indict Assange for espionage. But Assange insisted his mission was to promote justice through the method of transparency. The world has a lot of problems that need to be reformed - and we only live once, he said. Every person who has some ability to do something about it, if they are a person of good character, has the duty to try and fix the problems in the environment in which theyre in. He said Wikileaks had already done a lot of good: The gradual unfolding of the process of political reform is something that we cannot see immediately, but already we see that we have changed governments - we have certainly changed many political figures within governments. We have caused new law reform efforts. We have caused police investigations into the abuses we have exposed. Asked whether the publication by Wikileaks would prevent diplomats from committing to paper their honest opinions, Assange added: No, they just have to start committing things to paper that theyre proud of. In an interview with The Times on Tuesday, Assange confirmed that WikiLeaks was holding a vast amount of material about Bank of America which it intends to release early next year. We dont want the bank to suffer unless its called for, Assange told The Times. But if its management is operating in a responsive way there will be resignations, he said, without giving details about the material. Shares in Bank of America have fallen amid speculation that it was a WikiLeaks target.