Final answer:
E. aerogenes is positive for the Voges-Proskauer and Citrate utilization tests in the IMViC series, which helps to distinguish it from other Enterobacteriaceae.
Step-by-step explanation:
The IMViC tests are a series of biochemical tests used to differentiate species of the Enterobacteriaceae family. The acronym stands for Indole, Methyl red, Voges-Proskauer, and Citrate utilization. When asked about the organism E. aerogenes (Enterobacter aerogenes), it is important to note its positive reactions in the IMViC series. Specifically, E. aerogenes is positive for the Voges-Proskauer test and Citrate utilization, while it is negative for the Indole and Methyl red tests. This combination of test results helps distinguish E. aerogenes from other members of the Enterobacteriaceae family, like E. coli, which would have a different pattern of IMViC responses.