Mycoplasma gallisepticum (MG) can be transmitted through hatching eggs. It is one of the many chronic respiratory diseases (CRD) out there--infectious bronchitis (IB), infectious coryza, laryngotracheitis are some of the ones out there.You just reminded me of a question I was wondering about. Can hatching eggs bring things into your flock? I mean, can the chicks that subsequently hatch from those eggs carry diseases? There are many times on BYC I have heard similar stories about people bringing in adult birds from somewhere, and Armageddon of diseases break loose. Makes me think I would never want to bring in an adult bird.
MB