We conclude that only large postchiasmal lesions are likely to cause symptomatic homonymous field defects in MS, usually characterized by rapid recovery. Hemifield VEPs have a low sensitivity for the detection of postchiasmal as compared with prechiasmal abnormalities.
Alternate Titles: Bacille Calmette-GuÃ©rin vaccine, Bacillus Calmette-GuÃ©rin vaccine. BCG vaccine, vaccine against tuberculosis. The BCG vaccine is prepared from a weakened strain of Mycobacterium bovis, a bacteria closely related to M. tuberculosis, which causes the disease.
The BCG vaccine is not generally recommended for use in the United States because of the low risk of infection with tuberculosis bacteria, the variable effectiveness of the vaccine against adult pulmonary tuberculosis, and the vaccine's potential interference with TB skin test reactivity.n the parts of the world where tuberculosis is common, infants may receive a vaccine called BCG (Bacille Calmette Guerin) for prevention of the disease.