Thanks CL. When you say I may not need to worry as long as they are separate, do you mean permanently or for a quarantine period? With the heat of the last 2 weeks since culling I'm hoping that it's died off in our environment but I know the girls that shared the tractor but remained well could be carriers for life - so I thought they could infect new birds I bring in. I am really hopeful that basically by doing what you did (culling the sick birds) that it won't crop up again. Only time will tell.
Thanks!
Ok, here is a link you should bookmark, and use it often.
I do.
If you scroll down the list to the end, there is a comparison chart that is also useful.
With MG, you can cross-contaminate other birds by the disease-carrying birds (that survive) and apparently with contaminated equipment.
Anyways, you can read more here on this site:
http://edis.ifas.ufl.edu/ps044