1. a) Control of Case

2. 1) No specific restrictions.

   1. 2) If a cluster of cases is identified, the local health authority shall look for evidence of infection from a common source.

3. b) Control of Contacts

   No specific restrictions.

4. c) Laboratory Reporting

   1. 1) Laboratories shall report to the local health authority patients from whom Listeria monocytogenes has been cultured from a normally sterile site or patients who have a positive result on any other laboratory test indicative of and specific for detecting Listeria monocytogenes.
   2. 2) Laboratories shall forward to the Department's laboratory clinical materials that are positive for Listeria monocytogenes.
   3. 3) Laboratories shall report and submit to the Department's laboratory any food or environmental Listeria isolates resulting from an outbreak investigation, or upon request.

(Source: Amended at 48 Ill. Reg. 4098, effective February 27, 2024)