My gelding is fine now. He did a few nasty things to that one leg in turnout: swollen bone and tendon sheaths and 3 cuts. He's back to work this last week, lots of trotting and light bending. We're also doing a lot of aisle work to help his sacrum which always 'goes out' when he isn't worked.
Interestingly, a 3rd case of cellulitis nearly happened at our barn (Chicago area). Think the extreme cold and 2ft accumulation of snow and ice in pasture is condusive to this happening. Anyhow, this last incidence was with a stallion I exercise. Happily, I caught it right away and he's fine. Another horse I work with had had surgery and others couldn't go outside because it was too cold and horses were getting injured, so several of us were hand-walking. I'll always remember this past January as "My month of hand-walking". They're worth it, right?
Good luck to all your horses' who had a bout of cellulitis. I get the impression if we catch it and manage it right away, long-term prognosis is great - as long as it's not actually lymphangitis.