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Offlineragadinks
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what kind of contamination is this ? (PIC)
    #2192497 - 12/20/03 08:45 AM (14 years, 4 months ago)

This contamination spreads rapidly on the agar plate. Does anybody know what it is ?







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Offlineragadinks
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Re: what kind of contamination is this ? (PIC) [Re: ragadinks]
    #2193824 - 12/21/03 09:01 AM (14 years, 3 months ago)

Bump !


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OfflineMAIA
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Re: what kind of contamination is this ? (PIC) [Re: ragadinks]
    #2195277 - 12/22/03 10:15 AM (14 years, 3 months ago)

I have no clue but it looks like it's spreading fast...

MAIA


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InvisibleG a n j a
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Re: what kind of contamination is this ? (PIC) [Re: ragadinks]
    #2195443 - 12/22/03 12:28 PM (14 years, 3 months ago)

I'm unsure what it is, i get the same contam sometimes, it
grows like bacteria but seems too dry, I right it off
as a form of dry rot, but this is just guess work.


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Offlineragadinks
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Re: what kind of contamination is this ? (PIC) [Re: G a n j a]
    #2196121 - 12/22/03 06:48 PM (14 years, 3 months ago)

that was the first time I had really bigger problems with contams. Some of the plates had yellow dots on them. On this plate it was spreading really fast. But I do not have a lot of experience with contams except with trich, lipstick mold and some sort of bacteria which I had on a cloned tissue of an enoki found in the wild.
Anyway it is annoying to lose half of the agar plates due to contams :frown:


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OfflineSuntzu
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Re: what kind of contamination is this ? (PIC) [Re: ragadinks]
    #2196211 - 12/22/03 07:16 PM (14 years, 3 months ago)

I know you guys hate seeing this stuff on your plates, but I love the great pics of bacterial contamination :wink:
If this were a bet, I'd go with Bacillus.  Bacillus can vary in colony color/texture to such a degree, that environmental isolates of the genus RARELY look like one another.  They can vary from looking like snot to looking like piles of rope.  They have a couple of things in common;  all Bacillus are motile [except Bacillus anthracis, I'm pretty sure] and so are often fast-spreading organisms.  They form endospores, which means they are consistent with airborne contamination [actually not too common to have airborne bacterial contamination from another genus].  The point of origin of the contaminant suggests airborne.
Nice photos, sorry about the loss of the plate :frown:


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Re: what kind of contamination is this ? (PIC) [Re: Suntzu]
    #2196300 - 12/22/03 08:03 PM (14 years, 3 months ago)

Quote:

I know you guys hate seeing this stuff on your plates, but I love the great pics of bacterial contamination



So at least someone is happy  :wink:

thanks for your advice suntzu. I was wondering where all these bacterial contamination was coming from and so I have exposed an agar plate to the stream of my tiny HEPA filter for about 4 minutes. But it seems to be ok, since none of that stuff developed on it. Maybe I just was not working close enough to it.


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