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                                              +                  —                  +  

PEA and CNA are selective medias that inhibit: