Atypical mycobacterial infections are infections caused by several types of mycobacteria similar to the germ that causes tuberculosis. These atypical mycobacterial infections are a frequent complication in patients with human immunodeficiency virus (HIV) infection or AIDS.
You are here. Louisiana Purchase. The Louisiana Purchase (1803) was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million.
By Robert McNamara. The Louisiana Purchase was the enormous land deal in which the United States, during the administration of Thomas Jefferson, purchased territory from France comprising the present day American Midwest. The significance of the Louisiana Purchase was enormous.In one stroke the United States doubled its size.he Louisiana Purchase was the enormous land deal in which the United States, during the administration of Thomas Jefferson, purchased territory from France comprising the present day American Midwest.