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Which of the following set of tests best differentiate Shigella from E. coli?

This organism has been documented as causing nursery outbreaks of neonatal meningitis and brain abscesses:

You have isolated a gram negative bacillus.  What is the first biochemical test to perform in order to determine the identification tests to set up?

An unheated suspension of Salmonella Typhi typically produces agglutination of Vi antisera.  Heating the same suspension is necessary to determine which other antigen?

Escherichia coli strains are associated with all of the following properties except:

In the carrier state, where are pathogenic Salmonella organisms carried?

The ONPG test allows organisms to be classified as a slow lactose fermenter by testing for which of the following?

Direct spread of pneumonic plague disease occurs by which route?

Decarboxylation of the amino acids lysine and ornithine results in which of the following as their end products:

Describe the principle of the Simmons citrate test.