Although the vast majority of bacteria are harmless or beneficial to one's body, a few pathogenic bacteria can cause infectious diseases. The most common bacterial disease is tuberculosis, caused by the bacterium Mycobacterium tuberculosis, which affects about 2 million people mostly in sub-Saharan Africa. Pathogenic bacteria contribute to other globally important diseases, such as pneumonia, which can be caused by bacteria such as Streptococcus and Pseudomonas, and foodborne illnesses, which can be caused by bacteria such as Shigella, Campylobacter, and Salmonella. Pathogenic bacteria also cause infections such as tetanus, typhoid fever, diphtheria, syphilis, and Hansen's disease. They typically range between 1 and 5 micrometers in length.
Pathogen
Pseudomonas
Pathogen
pathogenic bacteria
Pathogen
Campylobacter
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diphtheria
Pathogen
Streptococcus
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foodborne illnesses
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typhoid fever
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Hansen's disease
Pathogen
Shigella
Pathogen
bacteria
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syphilis
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Campylobacte
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tetanus
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iphtheria, syphilis
Pathogen
Salmonella