This page says "Billy Bell (William Bell Concept Band)" recorded DISCO WORM in 1978.

Glenn Underground (a DJ/Producer) also recorded DISCO WORM on "A Story of Deepness," Nite Life Collective CD #007, 1999.

For what it's worth, "Disco Worm" also seems to be the name of (1) a fly-fishing lure (2) an anti-parasite water additive for home aquariums.