English literature - Student Encyclopedia (Ages 11 and up) The writers of the British Isles, including England, Scotland, and Wales, have produced a great wealth of literature. The language in which English literature is written has evolved over hundreds of years and is still changing.
The indole test is a component of the IMViC series of tests, which is used for differentiating the Enterobacteriaceae. The motility test is useful for testing a wide variety of organisms. As a whole, the SIM test is primarily useful for differentiating Salmonella and Shigella.
Give a description of the tryptophanase test. We used a SIM medium (sulfur indole motility) tube. We stabbed it w/ a needle and streaked the surface. The next lab we looked for diffusion of growth from the stab line which indicates possible motility. A distinctive black pigment in the medium should be recorded as hydrogen sulfide (H2S). Then we added 1/4 inch Kovac's reagent and waited at least 1 min. but no longer than 5. A red color indicates it is indole positive.