MyQul, two points!
First, if you suspect a wild yeast infection, always stick a half dozen pints in containers that can be 'burped' as a prevention against bottle bombs, then let them sit for a long time. Try one every few months. Some wild yeasts are brilliant, and if you've a got a local good one you'll find out this way. If so, it's worth doing a few wild brews.
Second, with regard to botulism, I'm wary of it because I make a lot of charcuterie. If I want to check it out, I invite my aged mother around, feed it to her and wait to see if she complains that her face is going numb. I figure as she's weak, the signs will come on quickly. If she's still talking an hour later, it's good to eat!!!