28 Pa. Code § 27.157
A household contact of a case of enterohemorrhagic E. coli, who prepares or serves food for public consumption, who attends or works in a child care group setting in a capacity which requires contact with children, or who provides direct patient care shall be required to cease work until the contact has submitted two consecutive stool specimens, taken at least 24 hours apart and at least 48 hours after the last dose of any antimicrobial therapy, to an appropriate clinical laboratory for bacteriologic examination and those specimens are determined by the laboratory to be negative for enterohemorrhagic E. coli.
28 Pa. Code § 27.157
This section cited in 28 Pa. Code § 27.153 (relating to restrictions on food handlers); 28 Pa. Code § 27.154 (relating to caregivers in a child care group setting); and 28 Pa. Code § 27.155 (relating to restrictions on health care practitioners).