One of the environmental changes that P.multocida encounters during infection is

Question

One of the environmental changes that P.multocida encounters during infection is the limitation of nutrients and oxygen. One of the changes that P. multocida(a facultative anaerobe) makes in this environment is to switch to anaerobic metabolism which will dramatically affect its growth rate. What is most likely to occur as a result of the switch from aerobic anaerobic metabolism? Why would this affect the overall growth rate of the organism? Thankfully after a 2-week course of BDQ Sam fully recovered from this treacherous dog bite.

Explanation / Answer

The organisms will grow more slowly because they will produce less ATP compared to aerobic metabolism. Aerobic respiration, or cell respiration in the presence of oxygen, uses the end product of glycolysis (pyruvate) in the TCA cycle to produce much more energy currency in the form of ATP than can be obtained from any anaerobic pathway.

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