It's likely not as good of an answer as the Yellow Musk Zombie template, but the Blightspawned template from Unapproachable East could work as well. RAW it can only be applied to plants, animals, and beasts (a 3.0 type that got rolled into animals and magical beasts in 3.5), but there's no mechanical reason you couldn't apply it to other creature types as well.
It comes about as a result of an infection, and changes the base creature into a Plant that can also spread the infection. The blightspawned creature must make a Fortitude save every month (DC 15, +1 per previous save) or die. Upon death the base creature instead gains the Juju Zombie template, from the same book.