Bre,
At my facility we dont do any Medical screening. We handle meeting this standard through our GMP "Personnel Practices" training for both our employees and visitors. Employees are prohibited from working with food or food ingredients if there is a resonable potential of products becoming contaminated. Any cuts or abrasions must be covered with suitable dressings. Employees must report any such health issues/conditions to thier supervisors. If an employees is out for more then a few days, he or she must have a medical note stating they are "ok" to return to work.
With all the HIPAA laws in the US it makes it very illegal to ask for specific details on an employees health, the best we can do is to put policies and procedures together to protect us and our products from this type of contamination.