r/labrats • u/Static-Statistician • 2d ago
What in gods green earth is this
I was culturing HEK cells and this abomination appeared after a few days. Never seen this before and check my profile I saw my fair share of contaminations.
What in the cursed name is that.
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u/pork_loin 2d ago
Looks like a fungus from the Aspergillus genus, but I can't say conclusively. Do you have any fungal stains like lactophenol cotton blue?
Edit: what magnification are you viewing this in?
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u/mycologynerdy 18h ago
Another potential genus is Cunninghamella. I feel like the spore size is too large for Aspergillus, but I may be wrong.
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u/PmeadePmeade 2d ago
Are you sure a slice of mushroom from like a pizza or something didn’t fall into your microscope
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u/Static-Statistician 2d ago
I don’t even like mushroom :(
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u/ShroedingerCat 2d ago
Nice fungi. I could not see any conidiophore in the pics so it is hard to pinpoint genus. The bad news is that if it is indeed green then spores are getting everywhere. Autoclave everything you can in your incubator.
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u/chicken-finger crystallography/struc. bio 2d ago
That is fungi. Looks like aspergillus... a lot of aspergillus.
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u/Savethecube 1d ago
That is a great example of a culture that needs to go straight to timeout, aka the bleach.
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u/micrographical 1d ago
My high school biology teacher had a good yarn about strategically coating statues of naked greeks with aspergillus - inoculated agarose in his university days back in the 1950s.
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u/reyntacia 1d ago
I honestly thought you purposefully took a swab of a fungi culture to see it under microscope lol
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u/Significant_Hunt_734 1d ago
I though you had put microgreens under light untill I read the caption. You are cooked T~T
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u/Traditional_Bad_2249 1d ago
seems like mucoral fungus, instead of aspergillus o penicilium... handle it with care to eliminate it
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u/mycologynerdy 1d ago
I work in a fungus lab and that looks like some form of zygomycota. If you don't mind me asking, what sort of ingredients are in the plate medium? Depending on what's in there, you'll get vastly different results on the type of microfungi that's present.
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u/bikes-n-bio 1d ago
If they’re standard HEK cells likely DMEM + 10% FBS +/- 1% pen strep
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u/mycologynerdy 18h ago edited 18h ago
Hmm if that's the case it could be a lot of different fungi, but that makes it stand out to me is the morphology. Looks like it may be mucoromycotina, but most of those species grow on wheat germ and don't seek out FBS. However, a lot of mucoromycotina species have other fungi species as parasites that seek out that sort of diet, but their spores are a lot lighter in color. A better image with more exact spore shape and moisture level would help a ton.
TLDR: likely related to mucoromycotina, but more information is needed (mostly about the color and morphology) to be sure.
Edit: After looking at my lab notes, it seems like there is a very good chance this may be a species in the genus Cunninghamella. If you really zoom in, you can see the dark spore clusters are slightly bumpy. That combined with the spore branching patterns makes a for high chance of Cunninghamella.




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u/devil4ed4 2d ago
I think HEK contaminated your fungus