Deathplague Rat

Source: Harker's Guide to Vampire Hunting

Plague rats are a dangerous nuisance in many cities, especially those that suffer from a lack of fresh water, overcrowding, poor sanitation, and similar deficiencies. A plague rat by itself is easily handled, but dozens or hundreds quickly become a dire threat.

Deathplague Rat
Monster Level: 2
Tiny. Beast
STR	DEX	END	AWR	INT	CHA
-2	3	3	1	-3	-2
	Ref: 13	Fort: 13	Ant: 11	Log: 7	Will: 8
Armor Rating 11			Immune Sickened, Toxic
Hit Points 20			Senses Darkvision 30 ft
Speed 30 ft, Climb 30 ft
Skills (DEX) Sneaking +8
Features
Protected By Illness. The Deathplague Rat can only suffer from one disease at a time (typically Deathboil Plague or another high-lethality disease), making them Immune to other diseases while they’re afflicted by their current disease. Diseased Corpse. Any time a creature comes within 30 ft of the Deathplague Rat’s corpse if its corpse is not burned or otherwise cleansed, then the Deathplague Rat’s corpse, makes a +6 attack against the target creature’s FORT. On a hit, the creature contracts the disease that the Deathplague Rat had.
Actions
On each of the Deathplague Rat’s turns, it may take one of the following sets of actions. Move and take one Tier 1 action.
Tier 1 Actions
Move. The Deathplague Rat can move up to its speed. Bite. Reach 5 ft Natural Weapon. +3 vs AR. Hit: 4 (1d4+3) sharp, and make a secondary attack: +3 vs FORT. Hit: The creature becomes infected with the disease the Deathplague Rat is carrying.