Facts about tuberculosis: human disease,

One of the most serious diseases in humans is tuberculosis (TB), a complex disease that most often strikes the lungs. It is caused by the bacterium Mycobacterium tuberculosis and is transmitted from person to person through the air. In the lung the bacteria establish colonies; these attract a large immune response that produces granulomas—solid masses of...

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• bacterial diseases Diseases caused by bacteria . The most common infectious diseases, they range from minor skin infections to bubonic plague and tuberculosis . Until the mid-20th century, bacterial pneumonia was probably the leading cause of death among the elderly. Improved sanitation, vaccines , and antibiotics...
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