Leaches can get onto you, I used to get them a lot when I was younger swimming in some questionable water. But hey leaches are easy to remove so I wouldn't worry to much about it can just grab and pull or rumor has it urine works(however I believe this to be just like the jelly fish sting relief hoax...never tried it myself though). It's not like the leach is a brain eating amoeba or a flesh eating bacteria...now those are things that concern me these days.
