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Tuberculosis vaccine research

Tuberculosis vaccine research

C012/2532

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Credit

HUBERT RAGUET / LOOK AT SCIENCES / SCIENCE PHOTO LIBRARY HUBERT RAGUET / LOOK AT SCIENCES / SCIENCE PHOTO LIBRARY

Caption

Tuberculosis vaccine research. Scientist performing gel electrophoresis under ultraviolet light on DNA (deoxyribonucleic acid) extracted from the Bacillus Calmette-Guerin (BCG) vaccine against tuberculosis (TB). The DNA codes for antigen 85, a complex of 3 proteins secreted by the Mycobacterium tuberculosis bacterium, the cause of TB. The bacteria infect the lungs creating primary tubercles, nodular lesions of dead tissue and bacteria. The bacteria may enter the blood or lymph system and spread to other organs of the body. Photographed at the Institut Pasteur, Brussels, Belgium.

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