David Annandale
The Carrion Anthem

The dark forces of Chaos come to the Imperial world of Ligeta. A deadly plague, spread by music, sweeps the embattled planet, and the forces of Typhus, an ancient horror and the Herald of Nurgle, land to lay waste to the survivors.
Warhammer 40k
short

Also in:
Eye of Terror
25 For 25
Treacheries of the Space Marines
There Is Only War