I like how Pathfinder RPG has a few domains that clerics of only one particular god or goddess have access to. In that same vein I thought it would be appropriate for Urgathoa to have her own disease domain. Besides, the war domain does not seem to fit.
Disease Domain
Deities: Urgathoa
Caster
Level Ability
1st Touch of Disease (Su): You have the ability to spoil food or drink with but a touch. This makes water undrinkable and food inedible. You also have the ability to nauseate a target with a melee touch attack. This effect lasts for a number of rounds equal to your Charisma modifier. Once a subject has been affected by a Touch of Disease it is immune to the effects of another for 1 day.
2nd Inflict Light Wounds (Sp): You can cast [inflict light wounds[/i] 1/day per every two caster levels.
4th Contagion (Sp): You can cast contagion 1/day
8th Tolerance (Su): If ever affected by a disease you show all outwards signs and symptoms but suffer no ill effects, thus making you functionally immune to all diseases.
12th Highly Virulent (Su): Demon fever, devil chills, and mummy rot are now available to you when you cast contagion.
16th Aura of Plague (Su): Your body is riddled with disease and all those within 30 feet must make a Fortitude save DC 15 + half your caster level or become sickened. This effect lasts until they leave the aura and for 3 rounds afterwards.
20th Power World Kill (Sp): The diseases and foul magic that course through your body have become so powerful that you can unleash them against one opponent. You can cast power word kill 1/day.
So, what does everyone think?
the plague aura complicates some situations, such as traveling with a party. Maybe allow the cleric to suppress / resume the aura as a free action or something similar? Otherwise I like it.
I thought of that but I realized that a cleric of disease would have no problem with making other people ill. Since many of the "evil" gods, goddesses and their domains would most likely be used by NPC's this wouldn't be too much of an issue. As for a high level plague lord... well you better give her a wide berth...