Level 3 DiseaseWererat Filth Fever

Those infected by this disease waste away as they alternately suffer chills and hot flashes.

Stage 0: The target recovers from the disease.
Stage 1: While affected by stage 1, the target loses a healing surge.
Stage 2: While affected by stage 2, the target loses a healing surge. The target also takes a -2 penalty to AC, Fortitude, and Reflex.
Stage 3: While affected by stage 3, the target loses all healing surges and cannot regain hit points. The target also takes a -2 penalty to AC, Fortitude, and Reflex.
Check: At the end of each extended rest, the target makes an Endurance check if it is at stage 1 or 2.
8 or lower: The stage of the disease increases by one.
9-12: No Change
13 or higher: The stage of the disease decreases by one.

Published in Monster Vault, page(s) 194.