Common Bacterial Diseases in Humans

What are Bacterial Diseases?

Bacterial diseases are diseases caused by bacteria. There are a number of bacteria found in the human body. A variety of these do not cause any infections and are known as “good bacteria”. The bacteria that cause diseases in human are called “harmful bacteria”.

Read on to explore the bacterial diseases in humans caused by the harmful bacteria along with the causes and symptoms.

Also Read: Human Diseases

Bacterial Diseases


Bacterial Diseases in Humans

There are a variety of bacteria that cause diseases in humans. These include:

Bacterial Diseases in Humans Causative Agent
Pulmonary Tuberculosis Mycobacterium tuberculosis


Corynebacterium diptheriae


Vibrio cholerae


Mycobacterium leprae


Bordetella pertussis


Clostridium tetani


Yersinia pestis

Neisseria gonorrhoeae


Treponema pallidum

Salmonella enteritis

Bacterial Diseases Causes

The bacteria enter the human variety through various sources and cause bacterial diseases. These sources include:

  • Through contaminated food and water.
  • Having sexual contact with an infected person.
  • Sharing contaminated needles, or needles for tattooing.
  • Through infected faeces or body fluids.

Bacterial Disease Symptoms

Following are the major symptoms of bacterial diseases:

  • Bloody and painful urine
  • Irritability
  • Diarrhoea
  • Vomiting and nausea
  • Weakness
  • Stiffness in neck
  • Flu-like symptoms
  • Rashes and lesions

Risk Factors Involved

  • Infants and children.
  • Eating raw or undercooked egg and meat.
  • Malnutrition.
  • Chronic diseases.
  • Genetic factors.
  • Immunodeficiency disorders.

Also Read: Infectious Diseases

To know more about what are bacterial diseases, its causes, symptoms and the bacterial diseases in humans, keep visiting BYJU’S website or download BYJU’S app for further reference.


Test your Knowledge on Human Bacterial Diseases


  1. A 70 yr old lady housewife developed stomach cancer – now in stage 4 which was diagonised after tests on 4th June 2019. She was normal traveled in and out of the country. Never had any symptoms of pain. She had a mental tension over a litigation that did not go in her favor due to an alleged lapse of the legal practitioner. This was in Oct / Nov 2018 . She is a non veg. She underwent a uterus removal operation some years ago. Presently on medication. Chemotherapy or surgical operation risky according to medical practitioners advice. Could this be classified as a bacterial disease. Suggestions for diet and treatment.

    1. Cancer can have many causes- ranging from hereditary to even pathogenic. However, in this case, it seems to be a combination of several factors. There is no definitive evidence that stress leads to cancer, but many theories do exist supporting the same. One of the most popular theories is that continuous exposure to stress and associated hormones may promote growth and spread of tumours. Coming to the question, this case cannot conclusively be classified as a bacterial disease due to the involvement of several factors.

      Stage 4 stomach cancer is usually not curable, but it is certainly treatable. The primary goal is to ease the symptoms and control the spread of cancer. Furthermore, the treatment depends on the specific characteristics of the disease. Usual treatments for stage 4 stomach cancer may include radiation therapy, chemotherapy or even targeted drug therapy.

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