its a type of fungus. from what i know in previous experiance, my pal has a convict n it gt attacked by his FH n after a week, and with out treatments or care, it grew white fluffy fungus on the wound.
dnt take this the rong way but i see it as negligence, bcus as far as i know it onli appears when injured.
sorry if this affends you but thats how i see it