The female journalist, who works for a Bulawayo tabloid newspaper, reported the legislator to police under case No. I/R Number 4944/11.
Police spokesman Wayne Bvudzijena confirmed the arrest and said the legislator is in police cells in Bulawayo.
The journalist says Ncube knew he was HIV positive during a two-year relationship, but continued to have unprotected sex without disclosing his condition to his partner.
Ncube faces charges under the Criminal Law Codification and Reform Act for having unprotected sex with the female journalist without disclosing his HIV-positive health status.
While there have been several criminal prosecutions in Zimbabwe related to the willful spread of HIV, this is the first time a politician and member of parliament has been charged with lethally infecting a partner, according to rights lawyers.
"It's going to be a landmark case," said one rights lawyer in Harare, who preferred to remain anonymous for professional reasons. "This is the first time that a legislator is prosecuted under the Criminal Code for the alleged dissemination or transmission of the HIV virus."
HIV, or human immunodeficiency virus, can cause AIDS, and the associated immune system failure can make victims susceptible to infections and other diseases.
She says she tested negative in October three months after she started dating the legislator.
They split on July 31 last year after she discovered that the legislator was dating a a nurse at Ingutsheni Hospital. She says the legislator verbally abused her when she told him about her status.
The journalist said she took a test and discovered she was positive. She also discovered that the MP's wife had passed on due to HIV. The MP however claims it was a sting operation by the intelligence.
The Zimbabwe Union of Journalists said in a statement that the case highlights "increasing reports of sexual abuse targeting female journalists" by politicians such as MPs, ministers and businesspeople.
"The story is one example reflecting the levels of extreme vulnerability of female journalists.
"Sexual harassment of female or male journalists will not be tolerated and the union will do all in its power to protect its members," said Foster Dongozi, the ZUJ secretary general.
"We would like to warn perpetrators and would-be perpetrators to desist from this despicable behaviour of preying on female journalists.
"The union will not hesitate to name and shame the perpetrators of such heinous atrocities. We therefore urge our members going through the trauma of sexual attacks not to suffer silently, but to speak out," he said
Post published in: Lifestyle