The medium or media of choice used to recover Legionella is:

A
Specimens for culture should be inoculated to two agar plates for the recovery of Legionella, at least one of which is BCYE without inhibitory agents. This medium contains charcoal to detoxi-fy the medium, remove carbon dioxide (CO2), and modify the surface tension to allow the or-ganisms to proliferate more easily. BCYE is also prepared with N-(2-acetamido)-2-aminoethanesulfonic acid (ACES) buffer and the growth supplements cyste-ine (required by Legionella), yeast extract, <-ketoglutarate, and iron. A second medium, BCYE base with polymyxin B, anisomycin (to inhibit fungi), and cefamandole, is recommended for specimens such as sputum that are likely to be contaminated with other flora.

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D
The organism is C. diphtheria and therefore can grow on Tinsdale agar but fails to grow on MacConkey agar.

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B
Urea hydrolysis is a key test for Myroides spp., which is also distinguished by production of a characteristic fruity odor.

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D
P. aeruginosa, P. fluorescens, P. putida, P. veronii, P. monteilii, and P. mosselii comprise the group known as the fluorescent pseudomonads. These species all produce pyoverdin, a wa-ter-soluble, yellow-green or yellow-brown pigment that fluoresces under UV illumination. P. aeruginosa is the only species that produces pyocyanin.

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C
As environmental inhabitants, these organisms may be found in various niches. Most notable in terms of clinical relevance is their ability to survive in hospital environments, especially in moist areas. Although they are not considered part of normal human microbiota, these species can co-lonize a patient's respiratory tract during hospitalization, probably as a result of exposure to a contaminated water source or medical devices.

Easily the best answer, TY and have a wonderful day