OUr Lavender Orpington had surgery on a sinus last week and the dr just called with the pathology report: Avian TB. OMG. What should we do? He said he'd treat with a round of penicillin if we wanted to, but to be aware that the other chickens likely could catch it (I mean, wouldn't they already have, they've lived with her for 3 years)? and it can be zoonotic (hop to humans and other mammals).
What would you do? What should we do?
What would you do? What should we do?

I would cull the flock. TB is relentless and risky, not worth the trouble even though we all love our birds. Watched my aunt deal with it once, she culled the one bird hoping the rest would be fine and unfortunately that wasn't the case. Her pot belly pigs got it too.