IntroductionThe main purpose of performing multiple tests on an unknown organism was to choose an unknown test tube at random and identify which microorganism it was. One of the important things about these different tests is to make sure that the tests are done correctly and the results are interpreted correctly, otherwise the unknown organism will turn out to be a disaster. One case where it is important to interpret tests is in the medical field. If a patient is sick due to an unknown organism, samples can be taken from the patient and the laboratory can run tests on it and correctly interpret the results to identify the exact type of microorganism in order to cure the patient with antibiotics and treatments . Ultimately, this will help scientists cure diseases, create treatments for specific organisms, and help the world become a healthier place one step at a time. After carrying out the eighteen tests, the microorganism I identified and the subject of this report is Enterobacter aerogenes; this organism was obtained randomly by choosing an unlabeled tube containing the microorganism. One website articulates “E. aerogenes is a gram-negative, oxidase-negative, catalase-positive, citrate-positive, indole-negative, rod-shaped bacterium” (“Enterobacter Aerogenes — Details,” 2009). "Enterobacter aerogenes." it is a bacterium that causes diseases in humans through the accidental transfer of bacteria in a hospital environment (“Enterobacter Aerogenes”, 2011). This pathogen is not usually found in a human with a healthy immune system, reckless transfer of bacteria to a hospital causes most E. aerogenes infections and is usually drug resistant so cannot be cured with drugs (Rakusin, n.d.) .A case report I found online says that a 43-year-old man......halfway through a sheet of paper......the unknown microorganism and the microorganism did not react as they would have due and the lipids were not broken down in the process. (LAB BOOK) In conclusion, the unknown microorganism on which eighteen tests were performed corresponds to the microorganism Enterobacter aerogenes. The Gram stain appears exactly as it should, gram negative making it pink and the results of every test except the three experimental errors match this organism. The objective of carrying out various tests on an unknown microorganism was to be able to correctly identify the unknown microorganism based on its characteristics and the resulting results, this objective was achieved because the microorganism proved to be true from the results found from the tests . The randomly assigned unknown microorganism was in fact Enterobacter aerogenes.