The pus collection causes pressure on the spinal cord. The infection is usually due to bacteria. Often it is caused by a staphylococcus infection that spreads through the spine. It may be caused by tuberculosis in some areas of the world, but it is not as common today as it was in the past.
From the 1830s until 1870, the abolitionist movement attempted to achieve immediate emancipation of all slaves and the ending of racial segregation and discrimination.
Perhaps the most prominent and controversial reform movement of the period was abolitionism, the anti-slave movement. Although abolitionism had attracted many followers in the revolutionary period, the movement lagged during the early 1800s. By the 1830s, the spirit of abolitionism surged, especially in the Northeast.