How Long Does The Rabies Vaccine Last For?
In high risk situations for continuous exposure, test antibodies at 6 m
Detailed Answer:
Hello and welcome,
I can understand your concern having had a bat in our attic (in Wisconsin). It came in the fall and left in the spring.
It sounds as though your son and the rest of you are well covered. The recommendations for follow up is based on the risk of re-exposure. And different people have different responses to the prophylactics so here are the guidelines according to "Human rabies prevention-United States, 2008: recommendations of the Advisory Committee on Immunization Practices. MMWR Recomm Rep 2008; 57:1". The MMWR (Morbidity and Mortality Weekly Report) is a function of the CDC (Centers for Disease Control). These are the most recent guidelines:
1. If:
Virus present continuously, often in high concentrations. Specific exposures likely to go unrecognized. Bite, nonbite, or aerosol exposure.
Typical population: Rabies research laboratory workers; rabies biologics production workers.
Recommendation: Primary course (of pre-exposure prophylaxis). Serologic testing every six months; booster vaccination if antibody titer is below acceptable level.*
2. If:
Exposure usually episodic, with source recognized, but exposure also might be unrecognized. Bite, nonbite, or aerosol exposure.
Typical population: Rabies diagnostic laboratory workers, cavers, veterinarians and staff, and animal-control and wildlife workers in areas where rabies is enzootic. All persons who frequently handle bats.
Recommendation: Primary course. Serologic testing every two years; booster vaccination if antibody titer is below acceptable level.*
3. If:
Infrequent exposure (greater than population at large)
Exposure nearly always episodic with source recognized. Bite or nonbite exposure.
Typical population: Veterinarians and animal-control staff working with terrestrial animals in areas where rabies is uncommon to rare. Veterinary students. Travelers visiting areas where rabies is enzootic and immediate access to appropriate medical care including biologics is limited.
Recommendation: Primary course. No serologic testing or booster vaccination.
4. If:
Rare (population at large)
Exposure always episodic with source recognized. Bite or nonbite exposure.
Typical population: US population at large, including persons in areas where rabies is epizootic.
Recommendation: No vaccination necessary.
* Minimum acceptable antibody level is complete virus neutralization at a 1:5 serum dilution by the rapid fluorescent focus inhibition test. A booster dose should be administered if the titer falls below this level.
So- to answer your question, I would put your family in the infrequent or rare category. But if you are concerned, the highest level of caution would be to get your blood tested in 6 months for antibody level. The minimum coverage would be 6 months.
Your welcome
Detailed Answer:
Your welcome! You are not alone in having "bat OCD" but you can rest assured that you and your family are covered now.
Best regards,
Bonnie Berger-Durnbaugh, MD