Bacteria on the moon?

Streptococcus mitis is a unique bacterium… It made its way from Earth to the Moon!
Read the full story here

Advertisements

6 Responses to “Bacteria on the moon?”

  1. s.positive Says:

    Dear Dr RKA,
    the article is interesting and i ve a question:is the ability of streptococcus to live on the moon has something associated with its anaerobic living character?
    does “anaerobic” means living without oxygen completely?
    other bacteria which are a naerobic can live on the moon?

  2. s.positive Says:

    all I know about anaerobic bacteria is that it has an electron acceptor other than oxygen used by the aerobic bacteria in oxidative phosphorylation.
    i hope this is right!

  3. s.positive Says:

    i found the clear answer on John L’s bacteriology pages:

    [Strict or Obligate] Aerobe: An organism that is capable of using oxygen as a terminal electron acceptor [i.e., aerobic respiration], can tolerate a level of oxygen equivalent to or higher than that present in an air atmosphere (21% oxygen), and has a strictly respiratory type of metabolism. Some aerobes may also be capable of growing anaerobically with electron acceptors other than oxygen [i.e., anaerobic respiration].

    Facultative anaerobe: An organism that can grow well both in the absence of oxygen and in the presence of a level of oxygen equivalent to that in an air atmosphere (21% oxygen). Some are capable of growing aerobically by respiring with oxygen and anaerobically by fermentation [anaerobic respiration is also possible]; others have a strictly fermentative type of metabolism and do not respire with oxygen. [We form the “aerotolerant anaerobe” category with the latter type; see below.]

    Microaerophile: An organism that is capable of oxygen-dependent growth but cannot grow in the presence of a level of oxygen equivalent to that present in an air atmosphere (21% oxygen). Oxygen-dependant growth [i.e., aerobic respiration] occurs only at low oxygen levels. In addition to being able to respire with oxygen, some microaerophiles may be capable of respiring anaerobically with electron acceptors other than oxygen.

    [Strict or Obligate] Anaerobe: An organism that is incapable of oxygen-dependent growth and cannot grow in the presence of an oxygen concentration equivalent to that present in an air atmosphere (21% oxygen). Some anaerobes may have a fermentative type of metabolism; others may carry out anaerobic respiration in which a terminal electron acceptor other than oxygen is used. [The primary consideration for defining an organism as a strict anaerobe is its total intolerance of oxygen.]

  4. s.positive Says:

    i think we should have studied these definitions in our practical classes , anyway it is never too late.

  5. RKA Says:

    Great effort “s. positive.”
    You really do a god job finding the answers to all your questions.

    These definitions have been a part of the General Microbiology course in the first semester. I don’t feel we need to add them to the practical classes of the second semester.

  6. Bacteria become more virulent in a space shuttle? « Learning Microbiology and Immunology Says:

    […] An older story about “bacteria on the moon” […]

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


%d bloggers like this: