Bacteria that cause disease are called pathogenic bacteria. Bacteria can cause diseases in humans, in other animals, and also in plants.
Example: Tuberculosis
Tuberculosis is an infectious disease caused by a bacterium called Mycobacterium tuberculosis. Affects your lungs, but it can affect other parts of your body such as your skin or other organs.

Example: Tetanus
Tetanus is a medical condition characterized by a prolonged contraction of skeletal muscle fibers. The primary symptoms are caused by tetanospasmin, a neurotoxin produced by the Gram-positive.
Example: Salmonella
Salmonella is an infection which can produce outbreaks of gastroenteritis caused by contaminated food. It can also spread from person to person and from animals to people
Example: Leprosy
Leprosy is a chronic bacterial disease of the skin, nerves in hands and feet and the membranes of the nose. There are several million cases worldwide.
Example:Chickenpox
Chickenpox is a contagious disease caused by the Varicella-Zoster virus, a virus of the herpes family. Chickenpox is one of the diseases of childhood. The disease lasts approximately one week.
Example: Meningitis.
Meningitis is a medical emergency characterized by inflammation of the meninges. The most common cause of inflammation such as bacteria, that is when the meninges and cerebrospinal fluid of these players come through the nose or mouth.