What is Rabies?

Rabies is an infectious disease transmitted from animals and caused by a virus. It leads to progressive inflammation of the brain and spinal cord and is fatal. Clinically, rabies presents in two forms:

• Furious rabies – characterized by agitation and hallucinations.

• Paralytic rabies – characterized by paralysis and coma.

Although rabies is fatal once clinical symptoms appear, the good news is that it is entirely preventable with vaccines, medications, and technology that help avoid rabies-related deaths.

1. Incubation Period

The incubation period is the time from when the virus enters the body to when the first symptoms appear. During this time, the virus spreads from the wound into the bloodstream and travels throughout the body.

• Typically lasts between 30 and 90 days, but can range from 10 days to 2 years.

• The incubation period can be shorter when:

  • The exposed individual is a child.

  • There is a high concentration of virus at the site of infection.

  • The wound is close to the central nervous system (e.g., on the head).

2. Prodromal Stage

This stage usually lasts 1 to 4 days, during which the immune system ramps up to fight the invading virus. Immune responses trigger early symptoms of rabies, including:

• Fever

• Fatigue

• Headache

• Pain or tingling at the wound site

• Psychological changes such as agitation and increased fear

• Loss of appetite

• Sore throat

• Nausea, vomiting

• Diarrhea

• Anxiety and insomnia

• Depression

3. Acute Neurological Stage

This stage lasts 2 to 10 days, during which the virus has invaded the brain and starts causing severe neurological damage.

• Muscle groups become paralyzed, leading to death, usually due to respiratory failure.

• Rabies at this stage appears in two forms:

  • Furious Rabies

  • Paralytic Rabies

In both forms, the virus severely attacks the nervous system, leading to:

• Fever

• Stiff neck and muscles

• Generalized or localized seizures

• Excess saliva production

• Impaired breathing

Furious Rabies

This is the most common form, accounting for 80% of rabies cases. It is characterized by violent physical and psychological symptoms.

• Symptoms occur in episodes, alternating with moments of lucidity.

• Patients often show:

  • Mental agitation

  • Strange behavior

  • Hallucinations

  • Excessive salivation

  • Hydrophobia (fear of water) — attempting to drink may cause spasms in the throat muscles

Paralytic Rabies

Unlike furious rabies, this form is marked by gradual muscle paralysis without hallucinations or hydrophobia.

• Limbs become weak and inactive

• No episodes of delirium

• Breathing may eventually stop due to paralysis

4. When to See a Doctor?

Rabies vaccination is an effective way to prevent infection. You should see a doctor immediately after being injured by an animal or coming into contact with one suspected of having rabies.

Depending on the:

• Timing of the exposure

• Severity of the injury

• Your rabies vaccination history

… the doctor will determine whether you need a vaccine or further treatment.

Warning Signs That Require Medical Attention:

If you've had contact with a potentially rabid animal or suffered an animal-inflicted injury, look out for the following symptoms and consult a doctor immediately:

• Fever: Often accompanied by pain, tingling, or a pins-and-needles feeling at the bite or scratch site

• Digestive issues: Nausea, vomiting, diarrhea

• Sore throat: Spasms may occur when attempting to drink, especially in hydrophobic rabies

• Behavioral changes: Agitation, fear of wind or water

• Decreased motor function: Progressive muscle paralysis, delirium