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Friday, January 23, 2009

Testing for TB

As a precaution one should get tested for TB when one feels so. One should get tested if he/she has: -

Ø Spent time with a person having TB disease or suspected to have TB disease.

Ø HIV infection or any other immunosuppressed condition.

Ø Latent TB disease

Ø Gone to country/returned from a country with high active TB disease

Ø Gone to some areas where TB is common (homeless shelters, migrant camp, prison, hospitals etc.)

Ø Injected illegal drugs.

Saturday, January 3, 2009

Mode of transmission of TB

Mode of transmission of TB is through air from infected to non-infected person when infected persons cough or sneezes. Each sneeze contains approximately 40,000 of infectious droplets (i.e. droplets containing TB bacteria) and when nearby person breath in these droplets they may become infected. The bacteria after entering a healthy individual settle in the lungs and grow and thus infection starts in the lungs of a new individual. From there they can be transmitted to other parts of the body (kidney, spine & brain) through blood and infect those organs.

One should keep in mind that though TB in lungs or throat is highly contagious that in other parts of the body are usually not. So people should be aware of the fact that person with Active lung TB (there is another Latent form of TB that I will discuss later) can spread the germ and hence family members, friends and co-workers of TB patients are the most susceptible persons to have TB.

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