Marek's Vaccination in Unexposed Chicks Over a Day-old

[McChooky]

Its recommended for those who have had chickens with

According to this source of information, if a chicken if vaccinated for Marek's disease while carrying the eggs that will be hatched, chicks will be protected from Marek's for 3 weeks from hatch date.

'If you hatch eggs at home, your hens can also be vaccinated while still carrying the eggs. If the vaccine is effective, maternal antibodies—antibodies from the hen transferred to the chick—will persist in the chick for up to three weeks.'

The vaccine does not give vaccinated birds Marek's - if this was the case it would never have been rolled out as it would be much too risky. It would of destroyed a huge number of flocks around the world who could not afford or be supplied the vaccine. My source for this information is in the link below.

The vaccine does not pass on the disease, it cannot survive in the vaccine form.

'As hardy as this virus is in the feather dander, it is a live virus that dies rather quickly in vaccine form.'

This link contains graphic pictures.
https://extension.psu.edu/mareks-disease-in-chickens

They can get Marek's, but have an 85.3% better chance of not dying than they would without the vaccine.

'This serotype 3 vaccine was shown to be safe and gave overall protection of 85.2%'.

You can read about that here.

Key word there is 'sometimes'. The Stereotype 3 vaccine has a 85.3% success rate as mentioned above.

Please state your source's.

This is so they do not catch Marek's during the incubation period of the vaccine. This is important for the vaccine to work and for your birds safety, if you happen to have the disease in close proximity. It is hardy any work for the protection you and your bird's will benefit from in the future if your birds do end up catching Marek's.


'Birds must get the vaccine before they are exposed to the virus. Then the birds need about 4-7 days for the vaccine to do its work. That means complete isolation of the chicks for at least this time.'

Same link as the second one. Contains graphic images.
https://extension.psu.edu/mareks-disease-in-chickens

This is the same with unvaccinated birds.

'Birds that are healthy in appearance can be carriers of the disease.'
https://www.business.qld.gov.au/ind...lfare/pests-diseases-disorders/mareks-disease

Everyone must choose what is right for their flock. For my flock I've chosen not to vaccinate anymore of my birds with this leaky vaccine.

 

[InterestingChickens]

Its recommended for those who have had chickens with

Everyone must choose what is right for their flock. For my flock I've chosen not to vaccinate anymore of my birds with this leaky vaccine.

It is leaky becuase vacccinated birds can still pass on the disease. However, it is not leaky in the way birds can get the disase from being vaccinated against Marek's, that is misinformation.

 

[McChooky]

It is leaky becuase vacccinated birds can still pass on the disease. However, it is not leaky in the way birds can get the disase from being vaccinated against Marek's, that is misinformation.

Never once stated that.

 

[InterestingChickens]

Never once stated that.

This post of yours implied that...

The virus spreads quickly to birds that aren't vaccinated once exposed to birds that are vaccinated( Rispens CVI988) https://pubmed.ncbi.nlm.nih.gov/27569836/

 

[McChooky]

This post of yours implied that...

A vaccinated bird who has gotten a chicken form of Marek’s can pass that along to an unvaccinated bird. https://amerpoultryassn.com/2022/07/mareks-disease-vaccination/

 

[InterestingChickens]

A vaccinated bird who has gotten a chicken form of Marek’s can pass that along to an unvaccinated bird. https://amerpoultryassn.com/2022/07/mareks-disease-vaccination/

Has your findings suggested a vaccinated bird spreads Marek's disase more quickly than an unvancianted bird?

I understand where you are coming from - always good to clarify in posts as it can be taken a diffrent way than you meant it to (I am guilty of this as well!).

 

[McChooky]

Has your findings suggested a vaccinated bird spreads Marek's disase more quickly than an unvancianted bird?

I understand where you are coming from - always good to clarify in posts as it can be taken a diffrent way than you meant it to (I am guilty of this as well!).

" By preventing death, vaccination greatly increased the infectious period of the most virulent strains, increasing the total amount of virus shed by several orders of magnitude, and increasing it above that of the least virulent strain (Fig 1, bottom panels). Thus, the net effect of vaccination on both host survival rates and daily shedding rates was to vastly increase the amount of virus shed by virulent strains into the environment.

"https://journals.plos.org/plosbiology/article/info:doi/10.1371/journal.pbio.1002198

 

[McChooky]

Has your findings suggested a vaccinated bird spreads Marek's disase more quickly than an unvancianted bird?

I understand where you are coming from - always good to clarify in posts as it can be taken a diffrent way than you meant it to (I am guilty of this as well!).

Vaccinated birds shed more of the most viral strains of Mareks and suppress the weaker ones so yes they spread it faster

 

[LikeTurkeys]

Vaccinated birds shed more of the most viral strains of Mareks and suppress the weaker ones so yes they spread it faster

Spread to whom? To other chickens in your flock? They would get it anyways. Perhaps if you have an unvaccinated neighbor's flock, I could see a concern (but only if there actually is an extremely viral strain in your flock). Most strains are not that dangerous. The alternative is more dead chickens.

 

[McChooky]

Spread to whom? To other chickens in your flock? They would get it anyways. Perhaps if you have an unvaccinated neighbor's flock, I could see a concern (but only if there actually is an extremely viral strain in your flock). Most strains are not that dangerous. The alternative is more dead chickens.

Visitors can also unknowingly spread it by wearing the same pair of shoes in their coop to other places.