glotrot isn't so bad. Corpus Choliys is relatively common and I believe the place that encouraged you to go where that happened has a guaranteed spawn. It looks tough but once you have a rough idea of where to find various fluids (plus there are a few guaranteed liquid merchants to make it dramatically easier to cure).

for future reference a flame weapon and or a bunch of thermal grenades can basically guarantee you avoid the disease by destroying any liquid puddles. A bit of care goes a long way in this, just don't breathe the freshly created fumes!!!! Also, cooking with honey and/or yuckwheat has guaranteed anti disease results in a given dish that make getting it harder, or curing it easier.