One of my celery plants' leaves started curling downwards and lightening in color, which I recognize as the first stages of a disease that the plant won't recover from, so I pulled it. Researching it now, the only cause of these symptoms that I can find is celery anthracnose. I see plenty of mention of affected plants being "unmarketable" due to lesions on the stalks, but nothing about it being unsafe or tasting wrong, and I caught it early enough that I don't see any such lesions. Is there any reason not to eat any part of the stalk that looks okay? Is there any other disease that can cause these sorts of symptoms which would make them inedible?

Unfortunately I didn't take a picture of the plant in the ground before I pulled it, and it's been in the refrigerator since, but I've attached a picture of what it looks like now. It's probably hard to tell from the picture that the leaves even are curling—like I say, I pulled it just a day or two after I noticed—but it was very obvious compared to the healthy plants next to it.