 [ Symptoms ] i read that people get flu shots annually because flu strains change do strains of other diseases change [ Disease ] tuberculosis tb is caused by mycobacterium tuberculosis slow growing bacteria that thrive in areas of the body that are rich in blood and oxygen such as the lungs webmd medical reference from healthwise this information is not intended to replace the advice of a doctor healthwise disclaims any liability for the decisions you make based on this information © 1995 2011 healthwise incorporated healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated