I had this on my knee last year (my mum was in hysterics when I told her I had 'Housemaid's Knee'!!!) Mine was caused from impact rather than an infection, but it is the same thing. It hurt for a couple of weeks or so, although the swelling lasted several months. I didn't actually go to a hospital until a week after my accident (fell off my bike) so by the time I got there the swelling had already gone down slightly. I was told to keep it in a tight tube bandage for a while and keep taking anti-inflammatories. I was also told that if the swelling didn't go down they could drain it, but that even if they did it might just swell again, and that the best thing was to leave it to go down naturally.
I also took arnica, as I always do when I get any injury.
The knee is still noticibly more tender than my other, but I only feel this when I kneel, and it may be more to do with the impact rather than the bursitis. I don't think your husband will have any long term effects.
Vicky