Enterobacter cloacae is a bacterium, which is a Gram-negative bacterium that appears red by Gram staining. This bacterium is widely found in the living environment, mostly in human feces as a member of the intestinal bacteria, and does not cause disease in most cases. When the body’s immune barrier is compromised resistance becomes poor, such as burns, underwent invasive surgery, use of immunosuppressive drugs, overuse of antibiotics, can lead to opportunistic infections and can be drug-resistant bacterial infections, and is one of the culprits of hospital-acquired infections. The Enterobacteriaceae family includes Gram-staining negative Gibberella spp. that are non-budding, circumscribed flagellated, or non-flagellated. Can obtain energy by oxidizing a variety of simple organic compounds or fermenting sugars, organic acids or polyols, and most species can grow on inorganic nitrogen media containing a carbon source.