I removed one of my plants this AM as the leaves were curling up and stringy. After researching online I think it is either cucumber or tobacco mopsaic. Has anyone else encountered this and do I prevent it from spreading to the other plants. I have planted 20 heirloom plants and don't want to lose anymore.

Can you post a picture? That will help.
Either here on the forum or on Twitpic and then send the link.

Remove the plant and destroy. Don't compost the plant if you fear it is diseased.

Are any other plants showing signs of disease?
Do you smoke? That is one thing to check.

What has your weather been like? cool damp rainy? sunny warm beautiful?