POLICE are searching for men across the country who may have had unprotected sex with a HIV positive London woman who was jailed for giving a lover the killer virus.

Sarah Jane Porter, a 43-year-old mother of one, was yesterday sentenced to 32 months in prison for knowingly infecting her boyfriend of two years with HIV, which then led to AIDS.

She pleaded guilty to recklessly inflicting gross bodily harm in court last month.

It was reported today that the blonde hair salon receptionist embarked on a campaign of revenge over several years after contracting HIV from a former black lover in 2000, soon after the birth of her son.

Police believe Porter regularly had unprotected sex with young black men she met at nightclubs in London and other cities across England.

Police denied that they had spoken to 2000 men as part of the investigation, but reports today said police had traced 24 men who they believed had sex with Porter.

But only four men agreed to be tested, one of whom tested HIV positive. One of the tested men today said Porter was on a "payback mission".

"She caught HIV off a black guy and now she's on a payback mission. All the guys she has slept with are black," he told The Sun.

The 37-year-old man had a three month relationship with Porter. "Sarah is very very attractive, the sort of woman any guy would love to be with. But make no mistake she is a very dangerous woman. She's sick in the head," he said.

"She has had an awful lot of counselling over the HIV but it doesn't seem to have worked."

Police launched their year-long investigation in May last year after the man was told by a mutual friend that Porter had HIV.

It was also reported that Porter allowed the 31-year-old man she infected with the virus to believe that he was in fact the source of the infection.

In court he said he felt suicidal after he was diagnosed. "Besides the pain already suffered by me, my family and partner, I am petrified about what is to come. I know that my health will deteriorate," he said.

Porter was charged in January this year, but she reportedly slept with other young black men while on bail.

Detective Sergeant Brian McClusky said Porter refused to help police trace men that she had slept with.

He said the men police had traced may just be the "tip of the iceberg" and urged others to come forward.

"Porter herself was a victim. She was infected by another partner so I can understand people thinking that revenge was a motive, but she never told us," he said.

National AIDS Trust chief executive Deborah Jack said people must take responsibility for their own sexual health.

"The prospect of the police investigating the sexual history of people living with HIV in this speculative way is profoundly stigmatising, and appears to treat everyone with HIV as a potential criminal," she said.

"We seem to be back in the bad old days at the beginning of the epidemic when HIV had to be someone's fault.

"With only 46 per cent of people in 2005 always using a condom with a new sexual partner, it is time we stopped condemning some people living with HIV for majority behaviour.

"We must reassert the need for everyone to take responsibility for their own sexual health instead of instinctively trying to blame someone else."