CDC Guidelines for Rabies Post‑Exposure Prophylaxis after Skunk‑Related Exposure

Risk Assessment

Skunks are among the highest‑risk terrestrial carnivores for rabies transmission in the United States; the CDC lists skunks, raccoons, and foxes as the wildlife species most frequently infected with rabies【1】.
Contact of broken skin (e.g., a laceration) with skunk tissue, blood, or saliva constitutes a rabies exposure that requires full post‑exposure prophylaxis (PEP)【2】【3】.
The CDC defines contamination of open wounds, abrasions, or scratches with saliva or neural tissue from a potentially rabid animal as a “non‑bite” exposure that mandates both rabies immune globulin (RIG) and vaccine【2】【3】.

The first and most critical step is to wash the wound thoroughly with soap and water for at least 15 minutes【2】【3】.
If available, apply a povidone‑iodine solution or another viricidal agent to the wound【2】.
Evaluate the need for tetanus prophylaxis at the time of the encounter【2】【3】.
Suturing the wound should be avoided whenever possible to maximize RIG infiltration【1】.

For individuals with no prior rabies vaccination, both RIG and the rabies vaccine should be administered at the initial visit【1】【2】【3】.
RIG dosing: 20 IU per kilogram of body weight, given as a single dose on day 0. The majority of the volume should be infiltrated around and into the wound; any remaining volume is injected intramuscularly at a site distant from the vaccine injection【1】.
Vaccine schedule (for unvaccinated persons): four intramuscular doses in the deltoid on days 0, 3, 7, and 14 (the CDC recommends avoiding gluteal administration) – this schedule is derived from CDC guidance, although the specific citation for the dosing days is not provided in the cited references.

PEP is a medical urgency; treatment should begin as soon as possible, but delayed initiation remains effective because rabies incubation periods can exceed one year【1】【2】.
If RIG was not given on day 0, it may still be administered up to and including day 7 after the first vaccine dose【1】.

Wild carnivores such as skunks should never be held for a 10‑day observation period; the animal should be euthanized and tested promptly if it can be recovered【4】.
When the animal is unavailable for testing (as is typical after skinning), PEP must be started immediately without waiting for test results【4】.

Do not postpone PEP while awaiting animal‑testing results; initiate treatment immediately if testing cannot be completed within 48 hours【4】.
Small rodents are generally low‑risk and rarely require PEP, but skunks remain in the highest‑risk category for wildlife exposures【5】.
RIG should not be administered after day 7 of the vaccine series because it may interfere with the active immune response【1】.
In previously unvaccinated individuals, omitting RIG is inappropriate; both RIG and vaccine are essential components of effective PEP【1】【2】【3】.

When administered correctly and promptly, PEP is nearly 100 % effective at preventing rabies; no PEP failures have been reported in the United States since the introduction of modern cell‑culture rabies vaccines and RIG【1】【2】.
Once clinical rabies develops, the disease remains virtually 100 % fatal, underscoring the importance of timely PEP【1】【2】.

The Centers for Disease Control and Prevention recommends that all bites from wild terrestrial carnivores, bats, and wild animal hybrids require immediate post-exposure prophylaxis unless the animal is available for testing and proven negative for rabies 6, 7
Raccoons, skunks, foxes, and coyotes are the most commonly rabies-infected terrestrial animals in the United States, and all bites by these animals must be considered rabies exposures and PEP should be initiated immediately 6, 7
Bats are documented rabies reservoirs in all 49 continental United States and require PEP for any bite, scratch, or mucous membrane exposure 8, 9
PEP should be considered even when a bite is not apparent if direct contact occurred and the exposed person cannot be certain no bite or scratch happened 6, 7

A healthy domestic dog, cat, or ferret that bites can be confined and observed for 10 days rather than immediately starting PEP, according to the Centers for Disease Control and Prevention 6
In developing countries where dogs are the major rabies vector, exposures to dogs represent significantly increased risk 6

Small rodents and lagomorphs almost never require anti-rabies prophylaxis, as they are rarely infected with rabies and have not been known to transmit rabies to humans in the United States 6, 7, 10

Any penetration of skin by teeth constitutes a bite exposure requiring evaluation, and all bites, regardless of body location, represent potential rabies transmission risk 11, 12
Non-bite exposures from terrestrial animals rarely cause rabies but should be considered for PEP 11, 12, 13
Contact with blood, urine, feces, or petting a rabid animal does NOT constitute an exposure and is not an indication for prophylaxis 11, 12, 13

Do not confuse management of small rodent bites with bat or wild carnivore bites, as the latter almost always require PEP 10, 9
Do not fail to consider PEP for bat exposures when a bite cannot be definitively ruled out, especially in sleeping persons or children 9
Do not delay wound washing while arranging for PEP; immediate thorough washing with soap and water for 15 minutes is the most important first step 10