I know i posted this question before but i never got an answere. I know one thing is for sure before i got this infection i weighed 163lbs and after i got the infection 1 month later i weighed 148lbs. I still have this infection over a year later and my weight is still in the low to mid 140s. I asked my ent and reg dr this question and they both said no. When i was on antibiotics in the past i started to feel better and the weight started to come back. As soon as i stoped taking the antibiotic i started losing weight and feeling like crap again.
I've lost weight recently as well (16 pounds). Interestingly enough, I gained weight while taking Advair (a common side-effect), but after sinus surgery and a whole bunch of steroids, antibiotics, etc. my weight went down.
I attribute this to less alcohol intake, possible bone density reduction from the corticosteroids, anxiety, and less junk food.