A suburban Milwaukee laboratory was charged on Wednesday with reckless homicide in the deaths of two women whose Pap smears were allegedly misread at a time when each had cervical cancer.

With Wednesday's criminal charges against Chem-Bio Corp., Milwaukee County Atty. E. Michael McCann carried out the last request of Karin Smith, a 29-year-old certified public accountant from Nashotah, Wis., who died March 8. She had testified before the U.S. Senate Labor and Human Resources subcommittee the previous month, describing what happened after three Pap smears were characterized by Chem-Bio as normal.

Dolores Geary, a mother of three who died in 1993 at age 40, also had two Pap smears reported by Chem-Bio as normal. During a hysterectomy in 1991, she was found to have advanced cancer of the cervix. Geary was from Oak Creek, the suburb where Chem-Bio also is located.