Love Animals, Hate Rabies! A Vaccine-Preventable Illness That Can Kill
Rabies Vaccination for Travellers: Shortened Vaccine Series Now Available!
When you hear the word rabies do images of dogs frothing at the mouth come to mind? Usually this is something we see only in the movies, but when travelling to developing countries the risk of rabies becomes real and serious. While dogs are the main carriers of rabies in developing countries, any type of mammal can potentially be infected with rabies. Rabies is a high risk illness in Asia, Africa, Central and South America. An estimated 10 million people are exposed to rabies worldwide every year, resulting in about 55,000 deaths. Children are at higher risk for rabies as they have a small stature which makes severe bites to the head and face more likely. In this week’s blog I’ll tell you more about rabies disease and the risk of rabies in Canada and worldwide, and whether you should consider the rabies vaccine before your next trip. I’ll also tell you about the shortened rabies vaccine series that gives travellers more options for protection.
Rabies risk in Canada
Rabies is a low risk in Canada. In 2019, a 21-year-old man on Vancouver Island tragically died from the disease after swatting at a bat. As reported by CTV News, his family stated he was scratched by the bat but didn’t realize how serious it was. He developed symptoms of rabies 6 weeks later and died soon after. He was the first person in British Colombia to die from rabies since 2003.
Bats are the only known carriers of rabies in BC. The BC Centre for Disease Control states that only about 0.5% of bats carry rabies in BC, but about 8% of bats sent for rabies testing are positive as bats that come in contact with human or domestic animals are more likely to carry rabies.
In other areas of Canada wild animals such as raccoons, skunks, red foxes and arctic foxes can also carry rabies.
What is rabies?
Rabies is a severe and fatal disease caused by the rabies virus. The virus infects the nervous system and brain. The virus is spread to humans through contact with the saliva or nervous tissue of an infected animal (alive or dead). It is usually transmitted by a bite of rabid animal but has also rarely been spread to humans through open wounds (such as a scratch) or mucous membranes.
Symptoms of rabies in humans
People infected with rabies are often portrayed in movies as zombie-like while frothing at the mouth. While this may be an exaggeration of the symptoms, these symptoms may not be far from truth. Symptoms usually start 3-8 weeks after being infected but could take several years. Symptoms begin with fever and headache, progressing over the next few days to symptoms of anxiety, confusion, abnormal behavior, difficulty swallowing and spasms of the swallowing muscles, excessive drooling, fear of water, delirium and convulsions followed by coma and death. Once symptoms begin death will usually occur within 7-14 days.
True or false: it’s always obvious when an animal is infected with rabies
False! While it’s true that animals infected with rabies may act fearful and aggressive, they may also appear lethargic and unusually tame. Bats infected with rabies may also act strangely, becoming active during the day, or appearing lethargic. Some bats infected with rabies may also appear to behave normally.
The best way to prevent rabies while travelling – don’t get bitten!
- Don’t pet or go near stray animals.
- Be aware of your surroundings so you don’t accidentally surprise a dog.
- Don’t interact with monkeys or carry food where monkeys are near.
- Avoid contact with bats and keep in mind that they have tiny teeth so you may not always realize if you have been bitten by a bat. If you suspect a bat bite it is important to seek medical treatment immediately.
Getting vaccinated for rabies
Pre-exposure rabies vaccination may be recommended for some travellers depending on destination, duration of stay, the availability of post-exposure rabies treatment, and planned activities. The pre-exposure rabies vaccine series has traditionally involved a series of 3 injections over the course of 3-4 weeks. Unfortunately, the cost of the rabies vaccine and time to complete the 3-dose series often limits its widespread use for travellers, leaving many people at risk for the deadly disease. Thankfully, a 2-dose pre-exposure series is now available instead of the traditional 3 doses, making it easier for travellers to complete the series. The 2 injections are given one week apart. Protection after the 2 doses lasts for 3 years. For protection beyond 3 years a one-time booster or blood test to check antibodies is recommended between 1-3 years after completing the 2-dose series. This 2-dose series offers an equally safe and effective alternative for at risk travellers who would not otherwise be vaccinated against rabies due to cost or time restraints.
Reactions to the vaccine are uncommon and most often include soreness and tenderness at the injection site. Headache, fever, fatigue, and muscle aches may also occur.It is still necessary to seek medical attention following a rabies exposure, but the treatment is simplified and easier to find while travelling if you have completed the pre-exposure rabies vaccines.
What to do if bitten by an animal while travelling, or come in contact with a bat:
- Wash the wound thoroughly with soap and warm water for at least 15 minutes. Cleaning the wound immediately greatly reduces the risk of infection.
- Seek medical attention immediately for rabies treatment.
- If you have been bitten or scratched by a bat in BC, contact your local public health unit (https://immunizebc.ca/finder) for immediate assessment. If captured, the bat can be tested for rabies. See the BCCDC’s website for instructions on how to safety capture the bat http://www.bccdc.ca/health-info/diseases-conditions/rabies. Do not attempt to capture the bat if you have not had previous contact with it.
What is the treatment for rabies exposure?
Rabies treatment only works to prevent rabies if it is given before symptoms begin.
- For travellers who have completed either the:
- 3-dose pre-exposure rabies series OR
- 2-dose pre-exposure series within the previous 3 years OR
- 2-dose pre-exposure series and one-time blood test or booster:
Two doses of the rabies vaccine are needed on day 0 and 3 after the exposure (these doses do not need to be the same brand as the pre-exposure vaccine series).
- For travellers who have either:
- not received the pre-exposure rabies series:
- received the 2-dose pre-exposure series more than 3 years ago and did not receive a one-time booster dose or blood test:
Post-exposure treatment should be given as soon as possible (ideally within 24 hours) after exposure and should still be started regardless of time since exposure (even if several months have passed). Unvaccinated travellers need rabies immunoglobulin (RIG) on the day of exposure, as well as a series of 4 rabies vaccines on day 3, 7, 14 and 28 (or 5 doses in travellers with a compromised immune system).
The availability of RIG is limited in many countries. If access to RIG is delayed the vaccine series should still be started as soon as possible. RIG can then be given until day 7 after the first rabies vaccine was given. Some developing countries still use rabies vaccines grown in animal brains (these can be identified if you’re offered a large volume injection (5mL) daily for about 14-21 days). Travellers should not accept these vaccines but travel to where acceptable rabies vaccine and RIG are available.
If you receive treatment outside of Canada, obtain the name of the RIG and vaccines provided and consult your Canadian doctor or public health unit to ask for advice when you return home.
Don’t mess around with rabies on your travels. Prevention is key. If you think you may need the rabies vaccine for your trip book your pre-travel consultation at TravelSafe Clinic today! Simply call us at 604.251-1975 or complete our online booking form.