A woman in France tried to commit suicide by injecting herself with blood from a friend who had AIDS, doctors said this week.

The unidentified 41-year-old woman tested positive for the deadly AIDS virus about three months after injecting blood from a male friend who was terminally ill with the disease, said Dr. Eric Durand and colleagues at the Hopital Laennec in Paris.Blood tests conducted 10 days apart yielded results "clearly positive" for the human immunodeficiency virus, or HIV, despite efforts to prevent the infection by giving the woman daily doses of the AIDS drug AZT, the doctors said in a letter published in The New England Journal of Medicine.

The woman took blood from a friend who had been diagnosed two years earlier with AIDS, "innoculated herself with his contaminated blood and came to the emergency room in a panic two hours later," the doctors said

The woman was immediately given AZT, and the treatment was continued four times a day for five weeks, the doctors said. During that time, blood tests were negative for HIV. But her tests became positive about two months later, they said.

The doctors speculated that the failure of the treatment with AZT - also known as zidovudine - could have resulted from viral resistance to the drug or to doses that were too low.