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Infections caused by Yersinia pestis are rare in the United States. Those that do occur are most frequently located in which region?

A blood culture yielded an organsim with the following reactions: Indole: Negative Citrate: Positive TSIA: K/A, gas (+), H2s (+) Lysine: Positive Ornithine: Positive Motility: Positive Pheynlalanine: Negative ONPG: Negative Urease:Negative What is the most likely ID of the organism?

Which of the following microorganisms is associated with foodborne illness contracted from oysters and clams?

The power of advice and consent on treaties and presidential nominations was given only to which of the following? 

A urine culture plated to sheep blood agar was noted to be “swarming”.  No growth on CNA.  On MacConkey, there were >100,000 CFU/mL of a non-lactose fermenter.  TSI was reported as K/A + H2S. The organism was urea positive and indole negative.  The organism is most likely:

Choose the bacterial family that is best described as catalase positive, oxidase negative, gram negative bacilli that are facultative anaerobes and most of which reduce nitrates to nitrites.

The serotype 0157:H7 of which of the following bacterial species is associated with a serious diarrheal illness with high mortality rates among some populations?

On this agar, Salmonella produces a black bull’s eye colony:

An outbreak of diarrhea at a nursing home revealed an oxidase-negative, non-lactose fermenting, non-motile, gram-negative rod.  These characteristics presumptively indicate which organism?

Which genera of the Enterobacteriaceae are known to cause diarrhea and are considered enteric pathogens?