Bacterial diseases are caused by bacterial infections. List of diseases caused by bacteria is long. These diseases include any disease caused by bacteria.
Bacteria are a type of microorganism, which are tiny forms of life that can only be seen under a microscope. Other types of microorganisms include viruses, certain fungi, and certain parasites.
Many bacteria usually live in the intestine, skin, and genitals. The vast majority of bacteria do not cause disease, and many bacteria are beneficial and even necessary for good health.
These bacteria are sometimes referred to as “healthy bacteria” or “good bacteria.” Thus some bacteria are good, and some are bad for human health.
Bacterial Diseases in Humans
A small number of bacteria in the world cause infection and diseases. These infections affect a large number of people. 
Dangerous bacteria that cause infections and diseases are called pathogenic bacteria. Bacterial diseases occur when pathogenic bacteria enter the human body, reproduce and displace healthy bacteria, or grow in ordinarily sterile tissue.
Dangerous bacteria can also release toxins that harm the human body. 
Salmonella and Escherichia Coli cause food poisoning. Gonorrhea, a sexually transmitted disease, is caused by Neisseria Gonorrhoeae, Gastritis, and Ulcers are caused by Helicobacter Pylori are some examples of bacterial infections.
List of Diseases Caused By Bacteria in Humans
Bacteria can reside in any place or climate on earth. Besides, it can live inside or on people, animals, and plants. The bacteria that cause the disease are called pathogenic bacteria.
They produce toxic substances called Exotoxins and Endotoxins that exhibit a variety of mild to severe symptoms.
Here is the list of diseases caused by bacteria in humans.
Pneumonia is caused by bacteria called streptococcal pneumonia. It is found in the respiratory tract, and although it causes infection in the lungs, it does not cause infection in healthy persons.
Streptococcal pneumonia is usually a coconut-shaped bacteria.
The infection usually starts when the bacteria are inhaled and quickly reproduces in the lungs. If it becomes pathogenic, it leads to pneumonia.
The most common symptoms of pneumonia include coughing, high fever, and shortness of breath, among others.
Pneumonia is mainly treated with antibiotics. A pneumococcal vaccine helps protect against the development of this disease.
Bacteria called Vibrio Cholerae causes Cholera. It affects the intestine of the infected individual. It is a food-borne disease and is mainly transmitted through the contamination of food and water. Most cases of infection occur in areas with insufficient water and sanitation.
Cholera symptoms vary from mild to severe, including vomiting, diarrhea, and cramps. Research estimated 1.3 to 4 million cholera cases every year, and the infection causes 21000 to 143000 deaths worldwide.
Cholera is treated with antibiotics in severe cases, while the infected individual is hydrated in mild cases.
Tuberculosis is one of the most widespread bacterial diseases in the human population. It is caused by Mycobacterium Tuberculosis and mainly infects the lungs, bones, brain, and abdomen.
This disease is spread in the air, for example, when an infected person coughs, sneezes, or speaks, and is fatal if left untreated. The increase in HIV infections, especially in developing countries, has also increased the number of tuberculosis cases.
This increase is because HIV weakens the immune system of those affected and cannot fight pathogens.
The most common symptoms associated with Tuberculosis are weight loss, lack of appetite, chronic cough, and fever. Antibiotics can treat Tuberculosis, and isolation of infected people can also help prevent the spread of an active infection.
Treatment for Tuberculosis can take longer, for example, a year, depending on the severity of the infection.
Salmonella Typhi (S. Typhi) is a bacteria that causes Typhoid disease. In most cases, it develops due to contaminated food or water, especially mass food. The most common symptoms are fever, vomiting, and weakness.
Necrotizing fasciitis is a severe infection. The Streptococcus pyogenes bacteria mainly cause this. Streptococcus Pyogenes are spherical, ovoid, or generally round-shaped bacteria that typically colonize the body’s skin and throat.
Streptococcus Pyogenes are flesh-eating bacteria that produce toxins that destroy the body’s cells, mainly red and white blood cells. It causes the death of infected tissue, a process known as necrotizing fasciitis.
Other bacteria that can also cause necrotizing fasciitis include Escherichia coli, Staphylococcus aureus, Klebsiella, and Clostridium.
People most often develop this type of infection with bacteria that enter the body through a cut or other open wound in the skin. Necrotizing fasciitis usually doesn’t spread from person to person, and events are random.
Healthy people whose immune systems function correctly and practice good wound care hygiene have a low risk of developing the disease.
Bacillary dysentery is an intestinal inflammation caused by bacteria in the genus Shigella. Similar to Cholera, it is spread by contaminated food and water. Dysentery is also spread by individuals who do not wash their hands after using the toilet.
Dysentery symptoms can range from mild to severe. Severe symptoms include bloody diarrhea, high fever, and pain. Like Cholera, dysentery is typically treated by hydration. It can also be treated with antibiotics based on severity.
The best way to prevent the spread of Shigella is to wash and dry your hands properly before handling food and avoid drinking local water in areas where there may be a high risk of getting dysentery.
Meningitis is an inflammation of the protective covering of the brain and spinal cord known as the meninges. It is a dangerous infection and can cause brain damage and even death. Bacterial meningitis is a severe condition and can cause death.
Bacteria Neisseria meningitides usually infect meninges. The most common symptom of this infection is a severe headache.
Stiff neck and high fever are the other symptoms of this disease. Meningitis is treated with antibiotics. After the infection, antibiotics must start as soon as possible to help reduce the risk of death.
A meningococcal vaccine can help prevent it for those most at risk of developing this disease.
Bacteria, viruses, fungi, and parasites can all cause meningitis. Several bacteria can cause bacterial meningitis. The specific bacteria that cause bacterial meningitis vary based on the infected person’s age.
Neisseria meningitides and Streptococcus pneumoniae are the most common causes of the disease for adults and adolescents. In newborns, the most common causes of bacterial meningitis are Group B Streptococcus, Escherichia coli, and Listeria monocytogenes.
Sexually Transmitted Bacterial Diseases
The common sexually transmitted diseases caused by bacteria include:
Syphilis, Gonorrhoea, and Chlamydia. They are caused by:
- Neisseria Gonorrhoea: this is caused by Gonorrhoea
- Pale Treponema: is caused by Syphilis
- Chlamydia Trachomatis: is the causes of Chlamydia
These infections are treatable by using the proper antibiotics. However, if left untreated, they can lead to severe complications, such as pelvic inflammatory disease in women. These infections can even spread to other parts of the body and cause further infections.
Most of these infections are accompanied by swelling, fever, and abnormal secretions.
Other Diseases Caused by Bacteria Are:
Anthrax: caused by Bacillus anthracic
Tetanus: caused by Clostridium
Leprosy: caused by Mycobacterium leprae
Trachoma: caused by Chlamydia Trachomatis
Botulism: caused by Clostridium botulinum
Whooping cough: this is caused by Bordetella pertussis bacteria.
Diphtheria: corynebacterium diphtheria causes diphtheria
Leprosy: Mycobacterium leprae is the cause of leprosy.
Tetanus: clostridium tetani is the cause of tetanus.
Plague: Yersinia pestis causes this disease.
A method is also there to differentiate two types of bacteria based on their structural differences. Bacteria that maintain a crystal violet dye are known as Gram-positive bacteria. And the bacteria that do not retain the crystal violet dye and are red or pink are known as Gram-negative bacteria.
What are the Symptoms of Diseases Caused by Bacteria?
Bacteria are single-cell microscopic microorganisms. They are among the first known forms of life on earth. The list of diseases caused by bacteria is long.
There are thousands of different types of bacteria, and they live in every environment imaginable anywhere in the world. They live in the soil, seawater, and the depths of the earth’s crust.
The bacterial disease symptoms vary depending on the type of bacterial infection, the area of the infected body, and other factors, such as the patient’s age and medical history.
The bacterial disease symptoms can also resemble other diseases, such as flu, colitis, and viral infections.
The typical symptom of a bacterial infection is fever, although not all people with a bacterial infection have a fever.
Symptoms of Diseases Caused by Bacteria Can Include:
- Bloody and painful urine to urinate frequently
- Flu-like symptoms (fatigue, fever, sore throat, severe headache, cough, muscle aches, and pain)
- Nausea and vomit
- Pain, e.g., pain in the joints, ears, or stomach
- Rashes, wounds, and abscesses
- Stiff neck
So if any person realizes these symptoms, he should consult a doctor.
Signs of diseases caused by bacteria in children can also include:
- Swelling of the soft spot at the top of the head
- Difficulty eating
- Excessive crying or irritability
- Excessive sleepiness
What are the Complications of Bacterial Infections?
What happens if a bacterial infection is left untreated? An untreated bacterial infection can cause serious problems, so it is necessary to seek treatment.
Cellulitis (skin infection) and sepsis (blood poisoning), for example, can arise due to untreated bacterial infection.
Sepsis is a life-threatening condition and is a severe infection that can cause shock, organ failure, and death if left untreated. 
Blood poisoning is always a medical emergency. Immediately seek medical attention you have any of these conditions:
- shakes uncontrollably
- Rapid breathing and heart rate
Bacteria are single-cell microscopic microorganisms. Many bacteria live in the body of people and animals. Some bacteria would even live in radioactive waste. The list of diseases caused by bacteria is long.
They are on the skin and in the respiratory tract, mouth, digestive, reproductive and urinary tract, without causing damage.
Many bacteria are helpful to humans by helping them digest food or preventing the growth of other more harmful bacteria.
Harmful bacteria can cause disease by producing toxic substances, invading tissues, or both. Only certain types of bacteria cause disease. They are called pathogens. Sometimes the bacteria that usually reside in the body cause disease.
Some bacteria can trigger inflammation that can affect the heart, nervous system, kidneys, or gastrointestinal tract. Some bacteria (like Helicobacter pylori) increase the risk of cancer.