This post was most recently updated on February 2nd, 2015
If a Microbiologist isolated a pathogenic bacteria in the laboratory and suspected that this pathogenic bacteria is a Pseudomonas aeruginosa based on its Gram staining characteristics, colony morphology and biochemical tests.
Before reporting the isolate as Pseudomonas aeruginosa, the isolate must have fulfilled the following minimum requirements.
- Gram staining: Gram negative rod
- Oxidase positive
- Typical smell (fruity grape-like odor or corn tortilla)
- Recognizable colony morphology
- On blood agar or chocolate agar appear as give large colonies with metallic sheen, mucoid, rough, or pigmented (pyocyanin) and often Beta Hemolytic
- On MacConkey Agar colonies appear as lactose-negative with green pigmentation, or metallic sheen
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