Are you sure that is poison Ivy?

I thought about that possibility too and yes, I'm about 98% sure that it is poison ivy. See link below for more pictures.

Here is a link that might be useful: Poison Ivy Parasite?

Perhaps eriophyid mites? If so, seldom fatal.

I couldn't find any pictures (yet) but I did find this info:

"Eriophyid Mites

Mites within this group are very small (0.5 mm long) and are rarely seen even with the aid of a 10X hand lens. They are generally colorless and are often identified by the damage they cause. The mites attack a wide range of plants, including maples, camellias, hackberry, American elm, willow, and ash. They are one of the few mites or insects that feed on poison ivy or poison oak. Unfortunately, the damage is not enough to kill these plants. The life cycles of the eriophyid mite are not very well understood."

at http://msucares.com/pubs/infosheets/is1297.htm

Here is a link that might be useful: eriophyid mites on poison ivy and more

And here's more:

"Aculops toxicophagus produced puckered, irregular, wart-like galls on the lower and upper leaf surfaces of poison ivy. These galls turn from yellowish-green to brilliant red and make the usually dark-green ivy leaves very colorful."

And a photo at
http://www.hsu.edu/content.aspx?id=2151
You'll need to scroll nearly to the bottom.

Here is a link that might be useful: eriophyid Aculops toxicophagus