Please look at the ringworm pictures in the guide link. they chart the course of an acute ringworm outbreak. it has to run its due course, which takes around a week to get past the acute stage.
PS: I have had other group piggies picking up the infection from spores in the past and coming down with their own patches about a couple of weeks or so later or - if they picked them up through my clothes or wherever, even weeks or months afterwards. Never all of them thankfully, and never the same piggies or in the same place again, so it was not a clear reoccurrence with the exception of one case. A ringworm outbreak with 16 or 30 piggies is no fun!
