Egg Carrier is an Enemy in Dark Souls.
These unfortunate souls crawling on all-fours are infected with a parasite that's causing large eggs to grow on their backs. They are mostly harmless as only a few will actively go after you without provocation, and the ones that do move so slowly that you can out-pace them with ease. If they attack you enough times successfully you'll be infected with the Egg Head affliction - more info on this can be found here. Killing them releases the Vile Maggots growing in their backs, and those creatures are small, hard to hit and are a general nuisance, so it's advised to avoid killing Egg Carriers at all where possible.
- 5 Vile Maggots
- Grub Attack - the Egg Carrier latches onto the player while a maggot comes out of one of the eggs and bites.
Most are non-hostile, so just avoid them. Not worth the hassle of dealing with all those worms.