Taarns suggestion reminds me of SCP-027 - The Rat God (don't read if bugs, rats and other small pests make you squirmy, you have been warned).
Appendix 1: Timeline of Significant Events
04/██/199█: Subject 027-01 is discovered in an abandoned warehouse outside ███████, ██, that had been completely overrun by rats, cockroaches, and other vermin, and is contained and cataloged as SCP-027. The subject is described as a Caucasian male in his late thirties, of average height but gaunt, filthy, and covered in bites and scratches. The subject also shows symptoms of degraded mental health, evidence of heavy use of alcohol and illicit drugs, and signs of prolonged sleep deprivation.
10/██/200█: Subject expires. Autopsy shows more than 70% of the subject’s body [DATA EXPUNGED] a colony of rats nesting in the subject’s abdomen for at least ██ generations.
10/██/200█: Between 140 and 150 hours after the Subject’s death, Security Officer K██████ F█████ reports being awoken by breathing problems due to a large housefly having crawled up his nose (later shown to have lain eggs). Subsequent observations lead to categorization of Officer F█████ as subject 027-02, the original host is reclassified as subject 027-01, and SCP-027 is redefined.
Think you could make a Rat God, or something like it, Syl?
