Symptoms of rabies:

1. At the beginning of the disease, the main symptoms are depression and abnormal behavior, such as not listening to calls, liking to hide in dark places, having strange habits, and liking to eat broken food. Sick dogs often lick the bite wounds with their tongues on stones, wood, soil and other objects.

2. Later, it develops into violent and restless behavior, attacking people and animals, and often running around aimlessly. Appearance: The sick dog gradually loses weight, the mandible droops, and the tail droops and is sandwiched between the two hind limbs. Hoarse voice, increased salivation, and difficulty swallowing.

3. In the later stage, the sick dog will develop symptoms of paralysis, difficulty walking, and eventually systemic failure.

Causes of rabies:

1. The rabies virus mainly exists in the brain tissue and spinal cord of sick dogs. There are also large amounts of viruses in the salivary glands and saliva of sick dogs, and they are excreted out of the body with the saliva.

2. The virus can be found in the saliva of sick dogs 10-15 days before clinical symptoms appear and 6-7 months after symptoms disappear. Therefore, when animals are bitten by sick animals, they become infected.

3. Some seemingly healthy dogs and cats can also contain viruses in their saliva. When they lick people or other animals, or live with people, they can also cause infection.

4. Many wild animals, such as wolves, foxes, deer, bats, etc., can not only become sick and die after being infected with this disease, but can also spread the disease. For example, some species of bats (African vampire bats) often attack humans and animals after being infected with rabies virus, causing infection and disease.

5. Air contaminated by respiratory secretions and urine can also cause respiratory infections in humans and animals. Wild animals can become infected through their digestive tract by eating diseased carcasses.