Rabies Risk from Possums and Rats: Low but Not Zero

Possums (opossums) and rats are rarely rabies vectors in North America, but any mammal bite warrants assessment.

Species-Specific Risk

Animal	Rabies Reservoir Status	Notes
Opossums	Extremely low	Low body temp (34–36°C) inhibits viral replication. Few documented cases.
Rats/mice	Not reservoirs	Small rodents/lagomorphs almost never transmit rabies to humans (CDC).
High-risk species	Reservoirs	Bats, raccoons, skunks, foxes, coyotes, mongooses (PR).

Other Zoonoses from These Animals

• Opossums: Leptospirosis, salmonellosis, toxoplasmosis, flea-borne typhus.
• Rats: Leptospirosis, hantavirus, rat-bite fever, plague (fleas), LCMV.

Post-Exposure Management

1. Wound care: irrigate 15 min with soap/water, povidone-iodine.
2. Tetanus booster if >5 yrs (dirty wound) or >10 yrs (clean).
3. Rabies PEP decision: based on animal species, behavior, local epidemiology, testability.
4. For low-risk species (opossum, rat) with normal behavior: observation only; PEP rarely indicated.
5. Consult local health department for jurisdiction-specific guidance.

Don't panic over possum/rat bites, but do clean thoroughly and seek medical evaluation for tetanus and other infections.