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Obligate Aerobe Information

An obligate aerobe is an aerobic organism that requires oxygen to grow. Through cellular respiration, these organisms use oxygen to oxidize substances, like sugars or fats, in order to obtain energy. During respiration, they use oxygen as the terminal electron acceptor. They have the advantage of yielding more energy than obligate anaerobes, but face high levels of oxidative stress.[1]

Examples of obligate aerobic bacteria: Nocardia (Gram-positive), Pseudomonas aeruginosa (Gram-negative), Mycobacterium tuberculosis (acid-fast), and Bacillus (Gram-positive).

· · Microbiology: Bacteria
Pathogenic bacteria

Bacterial disease · Coley's Toxins · Exotoxin · Lysogenic cycle
Human flora

Gut flora · Skin flora · Vaginal flora
Substrate preference Lipophilic · Saccharophilic
Oxygen preference Aerobic (Obligate) · Anaerobic (Facultative, Obligate) · Microaerophile · Nanaerobe · Aerotolerant
Structures
Cell envelope

Cell membrane

Cell wall: Peptidoglycan (NAM, NAG, DAP)

Gram-positive bacteria only: Teichoic acid · Lipoteichoic acid · Endospore

Gram-negative bacteria only: Bacterial outer membrane (Porin, Lipopolysaccharide) · Periplasmic space

Mycobacteria only: Arabinogalactan · Mycolic acid
Outside envelope Bacterial capsule · Slime layer · S-layer · Glycocalyx Pilus · Fimbria
Composite Biofilm
Shapes Bacterial cellular morphologies · L-form bacteria · Coccus (Diplococcus) · Bacillus · Coccobacillus

: BAC

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References

  1. ^ "Obligate aerobe - definition from Biology-Online.org." Biology Online. Biology-Online, n.d. Web. 12 Dec 2009. <http://www.biology-online.org/dictionary/Obligate_aerobe>

Categories: Microbiology

 

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