I realize this is a very old post, but I am just getting over strep and prior to strep attacking my tonsils, I broke out with a horendous set of hives. No antibiotic, buuuut Im a photographer and I had been outside shooting a wedding where the mosquitos were AWFUL! The strep virus had been passed through a mosquito bite on my ankle. My daughter within days came down with strep throat. Shortly after, I worked a very late night that resulted in strep throat the following day for me, but the doctor said it all started from the mosquito bite and hives reaction.
Just a few years prior, we experienced the same phenomenon with my son, who had been bitten by a mosquito and broke out with little skin legions (not hives) all over his legs. Everyone in the house caught strep throat except him...turned out, he was the carrier. Once the doctor had him on antibiotics his legions cleared up and thankfully our reoccuring cases of strep in our household of six was no more.