i found a 3 1/2 inch worm in my cooked chicken...what kind of worm is it and...

[JamieKelley]

...is it harmful? it's white and round and appears to have a growth of some kind,maybe mutating?

 

[Scarlett]

Yikes.
I'd like to know where the chicken came from...the grocery store, fast food chain; where did you get it?
and which piece was it?