They haven’t really figured it out though. They think it’s a bacterium but it appears to be a new bacterium, maybe a mycoplasma maybe a strep zoo, but they still can’t even be sure that the bacterium they identified is the problem and they don’t know the identity of that bacterium. I suspect they are right about it being some sort of mycoplasma bacteria because that would account for it not responding well to the normal antibiotics and it is behaving much like mycoplasma pneumonias in cattle. So they think they have a direction to head but are far from sure exactly what it is.