The state Board of Examiners for Nursing disciplined nine nurses this week, including taking action against seven nurses who abused drugs or alcohol. The board revoked the license of Christine Tracy, a licensed practical nurse, for abusing heroin in 2014. The board’s memorandum of decision said that Tracy of Ansonia was arrested in 2014 after driving on the wrong side of the road and striking two other cars. After being hospitalized, she was found in possession of seven bags of heroin. She was arrested and placed on probation for three years in 2016 after pleading guilty to possession of narcotics and failure to appear in court, the memo said.