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FAST REVISION
Microbiology
Colonies of E. coli serotype O157:H7 appear on Mac Conkey Sorbitol Agar as colourless colonies non-sorbitol fermenter. Others E. coli, sorbitol fermenters, give red colonies and gram-negative non-sorbitol fermenters appear translucent.
Radiology
Which of the following is true of the paralleling cone technique: it is easy to place with the film holder.