When you have a fever over 100 degrees.
When you are vomiting.
When you have diarrhea that's not controlled by Immodium.
At least that's what I've always thought.
So, let's talk about ringworm, then. It's contagious and we do a lot of handling of resident's, so should you work while you have it?
"Ringworm is contagious (spread to others) through direct contact with an infected person or animal. It can also be spread indirectly through contact with the clothes, combs, or brushes of others who have it. Once treatment has begun and the circular rash begins to shrink, the rash won't be contagious. Until then, however, a person with ringworm can spread it to others."
I vote that you stay home until it starts to shrink. And make sure you take all your medication if you're taking an oral anti-fungal like Diflucan.