Not listing the specific worm on the report is foreign to me but after doing a little research the term nematodes is a catch all for all types of worms. Poor bird, it must have looked like this when they opened it up.
Sorry, I thought I read three weeks. The chick sounds like it had internal problems from early on with its lack of development. Necropsies normally list the type of worm eggs found in the fecal exam and note the mature worms in the gut.
Three weeks of age is not old enough to die from a worm infection, cocci, yes, but the report did not list the protozoa. I believe it got chilled and went downhill from that. Dehydrated, wouldn't eat, systemic organ failure. E-coli could have played a part also because the chick was too sick...