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Unit 5

Pseudomonas Fluorescent Group

QuestionAnswer
Which of the following is not a fluorescent Pseudomonas species? Pseudomonas putida, Pseudomonas mendocina, Pseudomonas aeruginosa, or Pseudomonas fluorescens? Pseudomonas mendocina is not a fluoresecent Pseudomonas. It is non-fluorescent and usually considered a contaminant.
What test can be used to differentiate Pseudomonas fluorescens from Pseudomonas putida? The gel test can be used to differentiate the two because Pseudomonas fluorescens is gel positive, while Pseudomonas putida is gel negative.
Which fluorescent species of Pseudomonas grows at 42 degrees Celsius? Pseudomonas aeruginosa is the only fluorescent Pseudomonas species that grows at 42C. Both Pseudomonas fluorescens and putida will not.
What antibiotics are best used to treat Pseudomonas aeruginosa? Pseudomonas aeruginosa is resistant to most antibiotics except the aminoglycosides. It is also susceptible to Colistin, Polymixin B, Piperacillin, Ticarcillin, Ceftazidime, Cefepime, Imipenem, Meropenem, and Ciprofloxacin.
What color is the fluorescein or pyoverdin pigment? This pigment is yellow green. The other three pigments produced by P. aeruginosa are pyocyanin (turquoise blue-green), pyorubin (red), and pyomelanin (black/brown).
Created by: nkniep