1. Anaerobic infections are normally polymicrobial; these may include obligate aerobes, facultative Anaerobes or microaerophiles as concomitant microorganisms

2. Microaerophiles require oxygen for energy production, but are harmed by atmospheric concentrations of oxygen (21% O2).

3. Based on the oxygen requirement, organisms are categorized into different groups such as obligate aerobes, obligate Anaerobes, facultative Anaerobes, microaerophiles and aerotolerants

4. Many microaerophiles are also capnophiles, requiring an elevated concentration of carbon dioxide (e.g. 10% CO2 in the case of Campylobacter species).

5. The growth of bacteria with varying oxygen requirements in thioglycolate tubes; obligate Aerobes (A), obligate anAerobes (B), facultative anAerobes (C), aerotolerant anAerobes (D), microaerophiles (E)

6. Interpret visual data demonstrating minimum, optimum, and maximum oxygen or carbon dioxide requirements for growth; Identify and describe different categories of microbes with requirements for growth with or without oxygen: obligate Aerobe, obligate anAerobe, facultative anAerobe, aerotolerant anAerobe, microaerophile, and capnophile

7. Obligate Aerobe: Growth: No growth: Required (utilized for aerobic respiration) Microaerophile: Growth if level not too high: No growth: Required but at levels below 0.2 atm: Obligate AnAerobe: No growth: Growth Toxic: Facultative AnAerobe (Facultative Aerobe) Growth: Growth: Not required for growth but utilized when available: Aerotolerant