A Study Of The Patterns, Causes, And Effects Of Health And Disease Conditions

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“Epidemiology is the study of the patterns, causes, and effects of health and disease conditions in defined populations. It is the cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare”,(Wikipedia,2015, pp 1).In this paper, looking at tuberculosis as the most communicable disease which is pandemic and highly infectious in the present age. Tuberculosis in past was known as phthisis,phthsis pulmonalis or consumption. This disease has existed more than 5,000 years and it is has very difficult to eradicate it completely. One-third of the world 's population is thought to have been infected with tuberculosis and new infections occur in about 1% of the population each year. Tuberculosis Tuberculosis (TB) is caused by a bacteria known as mycobacterium tuberculosis. This bacteria is usually found in the lungs but can disseminate to other parts of the body like the brain, spine, bones and many more. TB can be deadly if improperly treated.TB can be spread by someone with the TB bacteria in the lungs, coughs it out and it goes into the air. So if a person nearby breathe in the air containing the bacteria, they become infected too. This is airborne disease. TB is not spread by shaking hands, kissing, sharing toothbrush, sharing same linen or same toilet seat and sharing food or drinks. Mycobacterium tuberculosis
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