Mark O. Martin Profile picture
Microbial evangelist and podcaster. Husband, father, moderate. Assoc. Professor facing retirement in June of 2026. Looking for what sparks microbial joy next.

Feb 15, 2022, 10 tweets

Starting the #TinyEarth approach with my #Bio111A #TeamMolecular students at @univpugetsound, we looked at their reusable water bottles and R2A plates, to teach microbial diversity, basic skills, and observation. Here is a swab on one bottle #WBB @ASMicrobiology (1/10)

@univpugetsound @ASMicrobiology Students were able to isolate various members of the water bottle microbiota as single colony isolates. @ASMicrobiology @univpugetsound (2/10)

@univpugetsound @ASMicrobiology On the way, so many interesting memebers of the water bottle microbiota were found. Here:
what I suspect is Bacillus mycoides. @ASMicrobiology @univpugetsound (3/10)

@univpugetsound @ASMicrobiology On the way, so many interesting memebers of the water bottle microbiota were found. Here:
mucoidy on the edges of groups. @ASMicrobiology @univpugetsound (4/10)

@univpugetsound @ASMicrobiology On the way, so many interesting memebers of the water bottle microbiota were found. Here:
gliding or flow of colonies. @ASMicrobiology @univpugetsound (5/10)

@univpugetsound @ASMicrobiology On the way, so many interesting memebers of the water bottle microbiota were found. Here:
"fried egg" colonial morphology. @ASMicrobiology @univpugetsound (6/10)

@univpugetsound @ASMicrobiology On the way, so many interesting memebers of the water bottle microbiota were found. Here:
pigmentation at the edges of colonies and groups. @ASMicrobiology @univpugetsound (7/10)

@univpugetsound @ASMicrobiology On the way, so many interesting members of the water bottle microbiota were found. Here:
possible siderophore production. @ASMicrobiology @univpugetsound (8/10)

@univpugetsound @ASMicrobiology On the way, so many interesting members of the water bottle microbiota were found. Here:
very thin "flares." @ASMicrobiology @univpugetsound (9/10)

@univpugetsound @ASMicrobiology On the way, so many interesting members of the water bottle microbiota were found. Here:
really odd looking phenomenon from mixed groups. @ASMicrobiology @univpugetsound (10/10)

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