Have you ever watched a beautiful dog with a smile on your face and imagined how amazing it would be to hug and love them? I do—every single time.
Now imagine a gentle giant—a St. Bernard.
Stephen King brought us a nightmare version of that image in Cujo, a beast terrorizing its surroundings in a story of intense horror. But here’s the thing—is Cujo really the monster, or simply a victim of circumstance after a bat bite?
Cujo is important here because dogs have historically been the main source of human rabies infections through bites. While dog-mediated rabies is now largely controlled in the Americas through mass vaccination, blood-feeding bats have become an important reservoir.
Image source: World Health Organization (WHO).
Rabies is a well-known and well-researched neglected tropical disease (NTD) that still reigns in terror in over 150 countries. It causes an estimated 59,000 deaths each year, mostly in children under the age of 15, particularly in Asia and Africa (WHO).
The rabies virus (RABV), a member of the genus Lyssavirus in the family Rhabdoviridae, is a tiny bullet-shaped virus with a cylindrical structure and small surface spikes (NIH).
What Rabies Does to the Brain
In Cujo, the dog goes berserk and starts attacking viciously. In reality, rabies presents in two main clinical forms: furious (aggressive) rabies—as portrayed in the novel—and paralytic (“dumb”) rabies. Both forms are fatal once symptoms appear.
Figure created by the author for educational purposes, based on WHO and veterinary clinical sources.
Furious Rabies
Furious rabies triggers extreme aggression and irrational behaviour. Infected animals may bite humans and other animals, as well as inanimate objects such as rocks or furniture. These behaviours result from restlessness, irritability, and a complete loss of fear (MSD Veterinary Manual).
When the virus reaches the brain, it causes severe inflammation, leading to confusion, disorientation, hallucinations, hydrophobia (fear of water), aerophobia (fear of air drafts), seizures, and muscle spasms.
Paralytic (“Dumb”) Rabies
Paralytic rabies, which is more common in dogs, follows a more progressive course. It often begins with weakness in the throat and jaw muscles, followed by excessive salivation—resulting in the characteristic foaming mouth.
Affected animals may become quiet and hide in dark, isolated places. As the disease progresses, incoordination and muscle weakness develop, eventually leading to full-body paralysis (PDSA).
In both forms, death usually occurs within 1–10 days after symptoms begin, due to paralysis, coma, and respiratory failure (Cleveland Clinic).
What Happens After a Bite?
Now we know what rabies looks like—and why it is almost always fatal once symptoms appear. Fortunately, vaccines exist for both prevention and post-exposure treatment, but only if medical attention is sought quickly.
The most effective way to prevent rabies transmission is mass dog vaccination. Vaccination programmes with high coverage can drastically reduce or even eliminate human rabies cases in certain regions. Make sure your dog’s vaccination status is always up to date!
Some groups are at higher risk of exposure, including veterinarians, laboratory workers, animal handlers, and travellers to endemic regions. These individuals are recommended to receive pre-exposure vaccination (PrEP) (Microbiology Society).
What to Do Immediately After Exposure
Accidents happen, and rapid action can save lives. After any suspected rabies exposure:
- Wash the wound thoroughly with soap and running water for at least 15 minutes to physically remove the virus.
- Disinfect the area using an iodine-based solution or 70% alcohol.
- Stop any bleeding, cover the wound, and remove any saliva from exposed skin.
- Seek medical care immediately to receive post-exposure prophylaxis (PEP) (WHO).
Vaccination must begin before symptoms appear—once symptoms start, rabies is almost always 100% fatal.
Final Thought
Rabies-associated attacks are not driven by evil intent or deliberate aggression from the animal, as Stephen King so terrifyingly portrayed. They are the result of a virus hijacking the brain, disrupting normal behaviour, and stripping away neurological control.
So yes—the beast is real.
And its name is rabies.
This article is intended for public science communication and is based on information from international public health agencies, peer-reviewed literature, and veterinary clinical resources.
References
- World Health Organization (WHO).
Rabies – Fact Sheet.
https://www.who.int/news-room/fact-sheets/detail/rabies - National Institutes of Health (NIH).
Structure and Morphology of the Rabies Virus (RABV).
https://pmc.ncbi.nlm.nih.gov/articles/PMC11437398/ - MSD Veterinary Manual.
Rabies in Dogs.
https://www.msdvetmanual.com/dog-owners/brain-spinal-cord-and-nerve-disorders-of-dogs/rabies-in-dogs - People’s Dispensary for Sick Animals (PDSA).
Rabies in Dogs: Symptoms and Progression.
https://www.pdsa.org.uk/pet-help-and-advice/pet-health-hub/conditions/rabies-in-dogs - Cleveland Clinic.
Rabies: Symptoms, Causes, and Treatment.
https://my.clevelandclinic.org/health/diseases/13848-rabies - Microbiology Society.
Rabies Vaccination, Post-Exposure Prophylaxis, and Prevention.
Journal of General Virology.
https://www.microbiologyresearch.org/content/journal/jgv/10.1099/jgv.0.001269
Leave a Reply