> What is cyclospora, anyway? It is not a bacterium or thing that I am familiar with. It is parasitic; it is a eukaryote; beyond those two definitions, it might as well be an alien from Venus because I'm not familiar.

Eukariotes include animals, plants, fungus, and the protists. As a sibling comment say, protists is a catch all bag for all the other eukaryotes, that include most algae, amebas and a looooooooooooooooooot of different unicelular organism.

In particular the closest relative of cyclospora that <allcaps>I</allcaps> can recognize is the one that causes toxoplasmosis, and more far away the one that cause malaria. But it's a very big and diverse bag, so I'd not extract too many conclusion from that. It also includes a lot of nice behaved things, not everyone is a nasty parasite there, just some of the most famous.

> Sanitizing water won't kill it? Not chlorination?

I guess the chlorine in tap water is not enough, but pure concentrated bleach would kill it. But I'm not sure and it also ruin your salad. Also, I guess enough heat would kill it too, and it also ruin your salad. https://xkcd.com/1217/