Contacts should be asked about symptoms during the period of household exposure and for five days after last exposure.
Local health authorities may require specimens from health care workers or those who work in occupations requiring standard precautions if there is reason to believe that specimen testing is necessary (e.g., the nature of the work, including feeding patients, assisting patients with eating, providing or preparing meals for patients, denture or oral care, hygienic practices of the worker, dispensing or administering oral medications, or as part of an investigation of a cluster). Specimens shall be obtained at least 24 hours apart. Specimens shall begin to be submitted within one week after notification, or the individual shall be restricted from patient care.
Local health authorities may require specimens from health care workers or those who work in occupations requiring standard precautions if there is reason to believe specimen testing is necessary (e.g., the nature of the work, including feeding patients, assisting patients with eating, providing or preparing meals for patients, denture or oral care, hygienic practices of the worker, dispensing or administering oral medications, or as part of an investigation of a cluster). Specimens shall be obtained following clinical recovery of the patient, at least 24 hours apart and not sooner than 48 hours after the last dose of antimicrobials, if administered. Specimens shall begin to be submitted within one week after notification, or the individual shall be restricted from patient care. When specimen submission is required, health care workers who feed patients or assist patients with eating or meals, provide denture or oral care, or dispense or administer oral medications shall be restricted from these duties until three negative stool specimens are obtained, or the public health authority determines that monitoring is no longer warranted.
Ill. Admin. Code tit. 77, § 690.360