Lice eggs aren't contagious. They are glued directly onto a hair strand and don't fall off. If a strand of hair falls off by using a nit hooked up to it and it occurs* to hatch, it can die. The nymph (In the egg) would need the warm ecosystem of The top to survive and a scalp for it to feed off of.The pinnacle louse can be an obligate ectoparasite