It's Reiter's Syndrome - or reactive arthritis.

Here are results from google.com:

http://www.google.com/search?hl=en&s...drome+&spell=1

For some reason, it feels familiar to have looked it up again respective of your brother's dx.

The AAF (American Arthritis Foundation) is a long-standing one, and one that many - with arthritis - have likely heard of at some point - in testing, treatment or routine appointments. (Many rheumatologists keep copies of its informational materials and/or its magazine in their offices). This is what the AAF has online about Reiter's:

http://www.arthritis.org/conditions/...er/reiters.asp