Upper gastrointestinal series tract in addition to barium, and this procedure is called double-contrast imaging. In this case the gas is referred to as the negative contrast medium. Traditionally the images produced with barium contrast are made with plain-film radiography, but computed tomography is also used in combination with barium contrast, in which case the procedure is called CT enterography. Various types of barium X-ray examinations are used to examine different parts of the gastrointestinal tract. These include barium swallow, barium meal, barium follow-through, and barium enema. The barium swallow, barium meal, and barium follow-through are together also called an upper gastrointestinal series
Human polyomavirus 12 with HPyV12. Human polyomavirus 12 Human polyomavirus 12 (HPyV12) is a virus of the polyomavirus family that infects human hosts. It was discovered and reported in 2013 after isolation from the organs of the gastrointestinal tract, particularly the liver. HPyV12 was first discovered in 2013 by generic PCR used to screen samples of the organs of the gastrointestinal tract. HPyV12 was identified first and most commonly in liver samples; it was also occasionally detected in the colon and rectum and in feces. The HPyV12 genome follows the typical organization for a polyomavirus, containing a small and large tumor antigen and