Klebsiella aerogenes

bacterium.^[3] Capable of motility via peritrichous flagella,^[4]

lactamase; infections accordingly become quickly resistant to standard antibiotics during treatment, necessitating a change in antibiotic to avoid worsening of the sepsis

venous catheter insertions, and/or surgical procedures. K. aerogenes is generally found in the human gastrointestinal tract and does not generally cause disease in healthy individuals. It has been found to live in various wastes, hygiene chemicals, and soil. The bacterium also has some commercial significance—experiments using molasses

mesophilic bacterium that can consume different sugars, and—unlike the cultivation of strict anaerobes—there is no requirement to remove all oxygen from the fermenter. Along with a short doubling time, K. aerogenes has a high hydrogen productivity and evolution rate. Furthermore, its hydrogen production is not inhibited at high hydrogen partial pressures. Its hydrogen yield, however, is lower than that of such strict anaerobes as Clostridia: strictly anaerobic bacteria produce a theoretical maximum of 4 mol H₂/mol glucose, while such facultative anaerobic bacteria as K. aerogenes theoretically yield a maximum of 2 mol H₂/mol glucose.^[6]