The lesion from a BR is very telling, it eats the flesh and the wound is open with no skin covering it. Most dreadful looking thing I’ve seen. The one I saw was not small either, irregularly shaped and I think painful. I saw it in the Joplin Public Library.
I lived in Southern Missouri and had a BR in my mixing bowls every morning. I thought I was killing them with boiling water down the drain, I should have smashed it. The webs are different too. If you put your hand on a BR web it is tough and irregular, no fancy web. Once you touch one, you will never forget it.
Yep. Called necrosis. Not everyone reacts the same to their bite. And, yes, they do have an irregular web...like the black widow.
If it was in your kitchen...they were probably looking for a water source.
They are hard to kill. If you smack them..they “play dead”.
Best thing to use is a powder pesticide and glue traps.