Gram-negative broth serves which purpose when used in the bacterial fecal culture?
a. Evaluation of general flora and predomi-nant species
b. Selection of enteric pathogens such as Salmonella, Aeromonas, and others
c. Inhibition of normal flora and selection of enteric pathogens
d. Enrichment for enteric pathogens such as Salmonella and others
D
Enrichment broths are sometimes used for enhanced recovery of Salmonella, Shigella, Campy-lobacter, and Y. enterocolitica, although Shigella usually does not survive enrichment. Gram-negative broth (Hajna) or selenite F broth yields good recovery.
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