QUESTIONS 49-52 REFER TO THE FOLLOWING INFORMATION.A urine specimen was sent to the laboratory and was plated on Sheep blood and EMB. After 24 hours incubation, the tech noted abundant growth on all plates of gram negative bacilli that was purple on EMB and produced a metallic green sheen.Which media should the tech use to perform the oxidase and catalase tests?

Diagnosis of typhoid fever during the first several days of illness is confirmed best by culturing:

What would be the expected appearance of the colonies on EMB?

What test should be done next to identify it?

Which of these is PAD + H2S – ODC +?

Salmonella is distinguished from Citrobacter because Salmonella is:

Agar media that is selective for the Vibrios:

The vibrios are always easily distinguished from aeromonads based on the:

Which is the only nonfermenter to produce pyocyanin?

Observe the following Salmonella serotyping results and determine the most likely species.                                                           Antisera   Before boiling:    Polyvalent        Vi              Group D                        –                   +                  –   After boiling:       Polyvalent        Vi              Group D                                              +                  —                  +