<prompt> Which of the following is a capnophilic bacteria?Staphylococcus aureusMycobacteriumClostridiumHaemophilus influenzae  <response>: Ref: Textbook of Diagnostic Microbiology, E-book, P 14 Capnophilic bacteria: Organisms which thrive on the high concentration of CO2 . They require 5-10 of CO2 . For example, Haemophilus influenzae, Neisseria. Facultative anaerobe: These are capable of growing under both aerobic and anaerobic conditions. For example, Staphylococcus aureus. Obligate anaerobe: These organisms grow only under non-oxygen environment. Oxygen is toxic for these organisms. For example, Clostridium. Obligate aerobe: There is absolute requirement of oxygen for survival for this type of organism. For example, Mycobacterium. 