Rainbow[R] Agar 0157 for Detecting E. coli.Designed to allow microbiologists to isolate and detect pathogenic organisms in one step, Biolog's proprietary chromagenic media, Rainbow Agar Agar, in the Bible Agar (ā`gər), the same as Hagar. agar, substance obtained from seaweed agar (ä`gär, ā`–, ăg`är) O157, is superior to other methods because it differentiates toxigenic toxigenic /tox·i·gen·ic/ (tok?si-jen´ik) 1. producing or elaborating toxins. 2. derived from or containing toxins. tox·i·gen·ic adj. Producing a poison; toxicogenic. strains of E. coli from nontoxigenic strains. Nontoxigenic strains grow as pink or magenta colonies. Bacteria that are not E. coli grow as white colonies. Reportedly, up to 25 percent of enterohemorrhagic E. coli outbreaks around the world are caused by non-O157:H7 strains of E. coli. Rainbow Agar O157 also enables the microbiologist to differentiate between O157 and other toxigenic strains. E. coli O157 grows gray to black, while other toxigenic strains, such as E. coli O26:H11, O48:H21, and O111:H8, grow purple to blue colonies. The USDA USDA, n.pr See United States Department of Agriculture. Food Safety and Inspection Service The United States Department of Agriculture's Food Safety and Inspection Service (FSIS) is charged with ensuring that all meat, poultry, and processed egg products in the United States are safe to consume and accurately labeled. (FSIS FSIS Food Safety and Inspection Service FSIS Food Safety Information System (of Malaysia) FSIS Fixed-Size Importance Sampling FSIS Functional Support Information Systems FSIS Fire Support Interface Specification ) guidelines now recognize Rainbow Agar O157. Rainbow Agar also has been approved by the Japanese Ministry of Health for use in detection of E. coli O157. |
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