This is a good question for the microscopy list (subscribe at
http://www.microscopy.com ). There's probably a C. elegans list that
would be good to consult.
There are also excellent resources on the web. A particularly good
one is David Hall's lab, the Center for C. elegans anatomy at
There are excellent methods here.
Good luck! Intact C. elegans is non-trivial. The cuticle causes much
fuss and bother, and most people doing EM use high-pressure freezing
methods, followed by freeze-substitution embedding.
>Can you please share your favorite worm fixation methods with me?? I've
>had great success in EM prep using 2% PFA 0.2% gluteraldehyde in
>cocodylate buffer. BUT-I had to "nick" the worms to get infiltration of
>the fixative. I now have a user who would prefer to avoid the "nicking"
>technique for his application, but so far, we're experiencing
>insufficient fixation. Any/all advice is very welcome!!!
>Many thanks in advance!
>Morphology and Imaging Core
Microscopy Facility Supervisor
024C Brooks Hall
Central Michigan University
Mt. Pleasant, MI 48859
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