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Case Study 21: Pseudomonas aeruginosa
1) The colony morphology of our case study is gram negative bacilli (rod) and can grow on any agar media. The culture is quite unique because it produces mucoid colonies, sometimes with fringed edges, with a blue-green metallic sheen. This metallic sheen is due to the pigment pyocyanin which is produced by the organism. Under ultraviolet light, the colonies fluoresce due to the compound fluorescein also produced by the organism. The odor of the organism is unlike most other organisms because it has a grape, fruit-like scent.
2) Based on the triple sugar iron (TSI) test, this organism does not utilize lactose as an energy source therefore the slant of the TSI test remains red. Additionally, the TSI test shows that the butt of the tube is red, meaning that it is a glucose non-fermenter.
3) This organism has an arsenal of microscopic features that make it quite virulent if it can invade the first line of defense. First off this......

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Approximate Word Count: 564
Approximate Pages: 3 (250 words per double-spaced page)

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