Please clarify allergies for me.

[pa715]

Is there any correlation with Sulfa, shellfish, latex, and iodine? A coworker tried to tell me that I need to ask if pts re allergic to shellfish if they are allergic to Sulfa? Is this true? It must be wrong. So confused! What do I need to know about allergies to these things?

[Crystal-Wings, LVN]

Iodine and shellfish go together, because shellfish had a high level of iodine in it.