Common Bacterial Diseases in Humans

This article on common bacterial diseases lists out all the common ailments afflicting man. There are innumerable pathogens out there that can cause a variety of diseases in our body. The only way to cure the diseases is to maintain a list of likely diseases along with the symptoms exhibited by a particular disease. The next step is to identify the culprit that is causing the disease. The micro-organisms that cause diseases in the human body are termed as Pathogens. Pathogens enter our body, multiply and interfere with normal activities. They can be bacteria or virus or fungal or even a protozoa. You can learn more about the common bacterial diseases that affect us all by visiting us online.

Bacterial Diseases


Bacterial Diseases in Humans

Bacterial diseases are by far the most common infectious disease and they range from minor skin infection to bubonic plague and tuberculosis. They exist literally everywhere so humans over the ages have developed a good immunity and we do not get that often in spite of living amidst bacteria. Bacteria cause disease by secreting or excreting toxins (as in botulism) and by producing toxins internally, which are released when the bacteria disintegrate (as in typhoid). Some of the major diseases caused by bacteria are;

  • Typhoid: A pathogenic bacterium named Salmonella typhi is responsible for Typhoid. It enters our body through contaminated food or water. Ingestion of these bacteria is followed by sustained high fever, weakness, stomach pain, constipation, headache and loss of appetite. It may be fatal in severe cases. Typhoid can be confirmed with the Widal test and can be cured with a strong dose of antibiotics to kill the bacteria.
  • Pneumonia: The bacteria Streptococcus pneumonia and Haemophilus influenza are responsible for Pneumonia. It affects the alveoli in our lungs and because of the infection, the alveoli get filled with fluid from the lungs and the victim faces great difficulty in breathing. Symptoms include fever, chills, cough and headache and lips and fingernails turning bluish in severe cases. A healthy person can get infected by breathing in the tiny droplets that a tuberculosis patient has coughed out.

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Practise This Question

The F2 genotypic ratio of Mendel’s monohybrid cross is ___.