Which group of tests assists in the rapid identification of the Enterobacteriaceae family?

The selection of Indole, oxidase, MacConkey, and blood agar plates as tests to assist in the rapid identification of the Enterobacteriaceae family is correct due to the specific characteristics of these tests and their relevance to this group of bacteria.

Indole is a key test that helps differentiate members of the Enterobacteriaceae family based on their ability to produce indole from the amino acid tryptophan. This feature is characteristic for certain genera, such as Escherichia and Proteus, allowing for more precise identification.

The oxidase test helps determine the presence of cytochrome c oxidase, which is absent in most members of the Enterobacteriaceae. This test can be instrumental in ruling out non-enteric bacteria that are oxidase-positive.

MacConkey agar is a selective medium that differentiates between lactose fermenters and non-fermenters within the Enterobacteriaceae family. Lactose fermenters, such as E. coli, produce acid from lactose fermentation, resulting in pink colonies, while non-fermenters display colorless colonies. This characteristic is very useful in identifying and classifying bacteria rapidly.

Blood agar plates are complex and rich media that support the growth of a wide range of organisms, including Enter