I am trying to identify presence/absence of e-coli in a nearby pond. Is this possible to do with foldscope? I have the basic 140x-magnification version.
Over here is a video of the aquatic sample I took. although there’s a bunch of stuff “moving” around, all the movement is caused by my efforts to focus the lens and pan around. As I move the lens back and forth, the fluid within the cover slip sloshes around and a bunch of particles go up and down. But alas, I don’t see any animate movement by any particle — which would’ve been my aha moment — to actually see a bacteria move.
So back to my question: I was hoping to identify e-coli by seeing little particulate matter move on their own devices. How do (or can I even) get there? (In the video, at about 0:33 and later, I zoomed into what I hopefully thought was a colony of e-coli. Could someone confirm or deny my hypothesis.).
PS: Sorry that my lens is dirty. I couldn’t wipe clean the dried-up parker-pen blue ink stain on upper left no matter how hard I tried.