Difference Between Aerobic And Anaerobic Bacteria

Bacteria have two types i.e. aerobic and anaerobic. The main difference between aerobic and anaerobic bacteria is that aerobic bacteria require oxygen to stay alive. whereas, anaerobic bacteria do not require, or do not depend on oxygen for survival and metabolic processes. Aerobic bacteria can thrive in habitats that are abundant in O2, while anaerobic bacteria can die in the presence of O2. These bacteria can grow advance in areas of the body not exposed to oxygen(O2) and can become virulent pathogens. The difference in the ability to use O2 between aerobic and anaerobic bacteria is important in the treatment of bodily infections.

Difference Between Aerobic And Anaerobic Bacteria In Tabular Form

Aerobic Anaerobic
The group of microorganisms that grow in the presence of oxygen and thrive in the anoxygenic environment. The group of microorganisms that grow in the absence of oxygen and cannot survive in the presence of an anoxygenic environment.
The oxygen molecule is the final electron acceptor. Ferric, sulfur, nitrate, fumarate, or carbon dioxide can be the final electron acceptors.
Produce more energy. Produce less energy.
Bacteria are seen on the surface of the liquid At the bottom of the liquid, Bacteria are settled.
Occur in soil, water, and on different surfaces. Occur in oxygen-depleted areas such as the digestive tract.
Mycobacterium tuberculosis is the main example of aerobic bacteria. Clostridium is an example of anaerobic bacteria.

Aerobic Bacteria vs Anaerobic Bacteria

Bacteria indicate a large domain of prokaryotic organisms. Bacteria are a few micrometers long and have various shapes, like spheres, rods, and spirals. They live in a wide variety of habitats including soil, water, acidic hot springs, radioactive waste, deep portions of the earth’s crust, and parasites on animals and plants. Bacteria are vital for the recycling of nutrients by breaking down organic materials and fixing nitrogen from the atmosphere in nutrient cycles. They exhibit a variety of metabolic types as well. Bacteria have two types i.e. aerobic and anaerobic bacteria according to the type of respiration. The main difference between aerobic and anaerobic bacteria is that anaerobic bacteria use molecular oxygen as the final electron acceptor in the electron transport chain, Whereas anaerobic bacteria use other molecules or ferric, sulfur, nitrate, fumarate, or carbon dioxide.

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Aerobic bacteria

Aerobes are bacteria which use oxygen in dissolved form for their metabolic reactions. Aerobic bacteria can exist as obligate aerobes such as Cholera vibrio, that grow only in the presence of oxygen, or they exist as facultative anaerobes, that grow in the presence of oxygen but can also tolerate aerobic conditions. The last hydrogen acceptor for aerobes is oxygen, which they use to oxidize the energy source and produce carbon dioxide and water as end products.

Aerobic Bacteria Examples

Nocardia sp. Pseudomonas aeruginosa, Mycobacterium tuberculosis, etc. are some examples of aerobic bacteria.

List of Aerobic Bacteria

  • Proteus
  • Klebsiella
  • Achromobacter
  • E. Coli

Anaerobic bacteria

Bacteria that do not require oxygen for their metabolism are called anaerobes or anaerobic bacteria. Anaerobic bacteria basically use oxygen from chemical compounds for their metabolic reactions. Unlike aerobes, they cannot use molecular oxygen and nitrate as terminal electron acceptors; instead, they use sulfate, carbon dioxide, and organic compounds as terminal acceptors. There are anaerobic bacteria called obligate anaerobes, that do not tolerate oxygen and are mostly inhibited or destroyed by oxygen. while, there are some anaerobes, like lactic acid bacteria, which can tolerate oxygen at normal levels, the so-called oxygen tolerant bacteria.

Anaerobic Bacteria Examples

Bacteroides, Fusobacterium, Porphyromonas, Prevotella, Actinomyces, Clostridia etc. are some examples of anaerobic bacteria.

List of anaerobic bacteria

  • Bacteroides
  • Propionibacterium
  • Actinomyces
  • Prevotella

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