Can my 10 year old child get scabies 1st time in only 1 day?

Went to a very unclean home on Monday and Tues. she had bumps on both her thighs. I did not know what it was so used anti-itch cream and finally Sat. evening was a ER being told --SCABIES! Is it possible that it came from that house or was it from school at an earlier time.