He spoke on Sunday in Maiduguri while briefing journalists.
Saidu said that the cases were recorded after voluntary screening in some IDPs’ camps in the state.
He pointed out that two out of the 512 persons were children.
“We are currently conducting voluntary screening on HIV/AIDS in IDPs’ camps across the state to determine the status of the people, especially those rescued from the Boko Haram terrorists.
“As at last week, we have recorded 512 positive cases, among which two are children,” Saidu said.
He said that the state had witnessed rising cases of the virus due largely to the Boko Haram terrorism.
“Currently, 2.4 per cent of the population of the state are living with HIV and AIDS, which translates to 108,000 persons, going by the record of the National Population Commission.
“But only a tiny portion of these people can access treatment because most antiretroviral centres have closed,” Saidu said.
He explained that only 32 out of the 90 antiretroviral centres were still operational in the state.
“Before the Boko Haram terrorism, we had 90 treatment centres across the state, but only 32 are still functional today.
“The rest have been closed down due to the Boko Haram terrorism,” Saidu said.
He called on the Federal Government and donor agencies to intervene in the HIV and AIDS control in the state.