Strachan gave his players Monday off in a bid to prevent the bug spreading after defender Stephen McManus went down with it at the weekend.
No-one has yet been ruled out as a result but the manager will take a head count before finalising his plans.
Full-back Justin Hoyte is struggling with a calf problem but Rhys Williams returns from suspension.
Tony McMahon (stress fracture of the foot), Seb Hines (ankle and knee ligament) and Matthew Bates (cruciate ligament) are still out.







