World TB day 2007: "TB anywhere is TB everywhere"

Mycobacterium tuberculosis infection is as old as civilization. The bacterium infects approximately a third of the world's population--roughly 2 billion individuals. It's estimated that 8 million new cases are contracted each year--around a new infection every second. ~2 million individuals die as a result of TB every year. The bacterium also plays a prominent role in the history of microbiology: it was on March 24, 1882, that Robert Koch announced his discovery of the causative agent of the dread disease tuberculosis:

"If the importance of a disease for mankind is measured by the number of fatalities it causes, then tuberculosis must be considered much more important than those most feared infectious diseases, plague, cholera and the like. One in seven of all human beings dies from tuberculosis. If one only considers the productive middle-age groups, tuberculosis carries away one-third, and often more."

Unlike many other feared infectious diseases of Koch's time, TB still remains a significant killer worldwide, and its effect has only been exacerbated by the AIDS epidemic. However, a concentrated effort is being made to again attract attention to this bacterium.

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