There has been discussion on another board regarding Mareks. I think there is a lot of misinfortion out there. I know people on this board have discussed it also. Yesterday, I e-mailed Dr. Fulton at MSU. He specializes in poultry. He was very helpful when we were hit with Mareks last year. This is
what I asked him:
Last year I had a bird with Mareks. You
very kindly advised me about her health issues via
e-mail. I thank you very much for that. I would like
to ask you about vaccinations. I hatched 23 chicks
this year in an incubator and vaccinated all for
Mareks. I have poultry acquaintances that are sure
that having these chicks vaccinated will infect any
bird they ever come in contact with for the rest of
their lives. I believe it is so predoninate in the
environment that I would be crazy not to vaccinate.
As an expert, would you please tell me if these
vaccinated chicks will turn out to be "Typhoid
Mary's." Would you please tell me what the risks of
vaccination are and if vaccinated birds are a real
threat to others?
Thank You For Your Time
He very kindly sent me a prompt response. This is what he said:
Dear Jody:
I understand your and your poultry pal's concerns but you are right in your thinking about Marek's disease. Marek's disease virus is everywhere. In fact, the vaccination of poultry for Marek's disease is a race to see which virus is going to win in the bird.....the vaccine virus or the disease causing virus. While it is true that Marek's disease vaccinated birds are infected with the vaccine virus for life,
I am not aware of them shedding the vaccine virus. The good news is that the vaccine viruses do not cause disease so your chickens are safe and not "Typhoid Marys." The other vaccines used in poultry do not cause
"Typhoid Marys" except for almost all vaccines used to protect against Infectious Laryngotracheitis. Chickens vaccinated with those vaccines can shed the vaccine virus and the vaccine virus will make non-vaccinated chickens sick.
As for vaccinating your chickens for other diseases, I only recommend vaccinating chickens against diseases you have had or that are in your area. In most cases, that only includes fowl pox. Please note that chicken pox is a human disease and not a chicken disease. The virus that causes chicken pox in humans does not cause disease in chickens
nor do humans get it from chickens.
Hope this helps,