The generic name Rahnella was given to honor the German-American bacteriologist Otto Rahn, and the species name aquatilis was selected because the organism is usually isolated from water.

Taxonomy
Family: Enterobacteriaceae

Natural habitats
As the name implies, they are ubiquitous in the environment, especially water, it is a water-dweller. Is also on food (meat, fresh water, fish and dairy products) plants, human and animal feces.

Clinical significance
Isolated from immunocompromised human patients, blood, sputum, wound, burn infections and bacteremia.