Authorities fear at least 12 women may have been deliberately infected with the HIV virus by a Zimbabwe-born circus acrobat.

Australian citizen Godfrey Zaburoni, 31, appeared in a Sydney court yesterday for an extradition hearing and is due to appear in the Southport Magistrates Court today.

Queensland chief health officer Dr Jeannette Young urged any women who had had unprotected sex with Mr Zaburoni, who it's been revealed once appeared on Australia's Got Talent, to seek medical attention.

"We're aware this gentleman has HIV and we understand he's had unprotected sex with quite a number of women across the country, so I'm here today to ask any women who have had unprotected sex with this man to come forward and be tested," she said.