I had a chicken wire looking rash on my inner thigh which I put down to either bart or my hot water bottle. It also looked a lot like like toasted skin syndrome.
I just googled “bartonella chicken wire” and others have reported it in connection with bart.
If it’s what I think it is, I had it most of my life, especially when cold, which I usually was. It was a purple splotchy look shaped kind of like honeycomb. It didn’t hurt or anything. That strangely went away in the last few years. My skin tone is more smooth, even and tan than it’s ever been and I’m 48 now. I’m pretty sure that is probably bart. So weird.