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A litmus milk tube with a white color is positive for

__________ is particularly useful when trying to differentiate Salmonella and Proteus species. 

Identify the reaction(s) that occurred in the litmus milk tube labeled B in the image below. Tube A is an uninoculated control. 

An unknown Gram-negative organism was inoculated on a variety of selective and differential media. The results for the eosin methylene blue (EMB) agar plate are shown below. Based on the observed growth, which of the following organisms can be eliminated from the list of possible bacteria used for the inoculation? EMB plate

The organism below is ______ for the enzyme oxidase.  

A Gram-positive cocci that is positive for mannitol fermentation and DNase is most likely

Phenylethyl alcohol agar is a(n) _______________ medium containing an ___________.

The final day of the bacterial examination of water study is known as the 

Calculate the total dilution of the E. coli culture in tube 4 in the dilution scheme shown below.

Two different organisms were inoculated into fluid thioglycolate broth. Following incubation the results shown below were observed. Tube A is an uninoculated control. The organism in tube B is most likely a(n)