API 20E Identification System for Enterobacteriaceae and other Gram Negative Rods. 1. The culture that I was given was culture B. The 7-digit numerical profile of my organism was 3604132. This organism is known as citrobater freudndii. 2. Escherichia. Escherichia consist of either singular or pairs of straight rods with a diameter of 1.1- 1.5mm and a length of 2.0-6.0 mm. In the majority of strains they have a capsule or a microcapsule present and their cell walls …showed first 75 words of 1160 total…

…showed last 75 words of 1160 total…is used to see whether a bacteria can produce gelatinises that digest and liquefy gelatine. Gelatine is hydrolysed by gelatinase into polypeptides and then into smaller amino acid molecules. The tubes, once inoculated, are incubated which causes the gelatine to melt. The tubes must then be refrigerated to solidify the contents before then removing and leaving at room temperate for 1 hour. If the contents are then a liquid the result is said to be positive.