@microtech84 - Tumblr Blog

C. fleundii, E.coli, S. marcescens and E. aerogenes in EMB agar (Eosin-Methylene Blue)

This is an agar used to differentiate bacteria which ferment lactose/sucrose (a type of sugar) from those that do not. Bacteria who are strong lactose fermentors turn quite the lovely metallic green you see in the picture, those that still ferment lactose can turn a purple color while those that don’t remain colorless.

archenland

Enterobacter cloacae

Enterobacter cloacae is a rod-shaped, gram-negative bacteria from the Enterobacteriaceae family. Enterobacter cloacae lives in the mesophilic environment with its optimal temperature at 37 °C and uses its peritrichous flagella for movement. This organism is oxidase negative but catalase positive and is facultative anaerobic. In other words, this organism can make ATP by aerobic respiration when oxygen is present but can switch to fermentation in the absence of oxygen.

Enterobacter infections can include bacteremia, lower respiratory tract infections, skin and soft-tissue infections, urinary tract infections (UTIs), endocarditis, intra-abdominal infections, septic arthritis, osteomyelitis, CNS infections, and ophthalmic infections. Enterobacter infections can necessitate prolonged hospitalization, multiple and varied imaging studies and laboratory tests, various surgical and nonsurgical procedures, and powerful and expensive antimicrobial agents.

The emergence of drug-resistant Enterobacter organisms has complicated treatment regimens, particularly within nosocomial settings, where such organisms have become increasingly common. Traditional approaches to treating Enterobacter infections involve single-agent antimicrobial therapy, typically with an aminoglycoside, a fluoroquinolone, a cephalosporin, or imipenem.

Key characteristics: Gram(-), catalase(+), oxidase(-), motility(+), indole(-), citrate(+).