Which characteristic is NOT associated with Morganella morganii?

Morganella morganii is a member of the Enterobacteriaceae family, and it is known for several key characteristics that help in its identification. One of these characteristics is being indole-positive, which indicates that the organism can break down tryptophan to produce indole. Additionally, Morganella morganii is urease positive, meaning it can hydrolyze urea, producing ammonia and increasing the pH of its environment.

Furthermore, it is also known to be phenylalanine deaminase (PD) positive, which means it can deaminate phenylalanine to phenylpyruvic acid. This characteristic is useful in differentiating it from other similar bacteria in laboratory settings.

On the other hand, Morganella morganii is motile, possessing flagella that enable it to move. This distinguishing feature is essential when comparing it to other non-motile bacteria. Hence, stating that Morganella morganii is nonmotile is not accurate, making it the characteristic that is not associated with this organism.