Double-contrast barium enema Double-contrast barium enema A double-contrast barium enema is a form of contrast radiography in which x-rays of the colon and rectum are taken using two forms of contrast to make the structures easier to see. A liquid containing barium (that is, a radiocontrast agent) is put into the rectum. Barium is a silver-white metallic compound that outlines the colon and rectum on an x-ray and helps show abnormalities. Air is also put into the rectum and colon to further enhance the x-ray. Double-contrast barium enemas are less invasive than a colonoscopy and have comparatively fewer issues in a viable large
Tenthredo colon feed on leaves of "Epilobium hirsutum", "Chamerion angustifolium", "Pteridium aquilinum" and "Salix". This species can be found in hedge rows in most of Europe and in the Nearctic ecozone. Tenthredo colon Tenthredo colon is a sawfly species belonging to the family Tenthredinidae (common sawflies). "Tenthredo colon" can reach a length of about . These sawflies have black head and thorax. Abdomen is black with a reddish area towards the tip. Legs are reddish. Antennae are black, with white tips. The larvae are pale brown with a characteristic diamond pattern of diagonal cross lines and a darker brown mark on the