Vaccinated chicken around one that wasn't vaccinated

Discussion in 'Emergencies / Diseases / Injuries and Cures' started by meadrian, Sep 15, 2009.

  1. meadrian

    meadrian Chillin' With My Peeps

    May 22, 2009
    San Francisco, CA
    Can a 12 week old chicken (now 22 weeks) who's been vaccinated for Marek's at a day old contract Marek's if they were around a chicken who had it? She was around her for for about 8 weeks before the other one died. We thought she'd been vaccinated, but then found out the breeder had a problem and actually wasn't.

    The one left (22 weeks old) was from a different breeder and seems very healthy. Just wondered if she could still contract it or be a carrier if she'd been vaccinated in the begining.

  2. wombat

    wombat Chillin' With My Peeps

    Jun 23, 2009
    Yes, it is possible for a vaccinated bird to still contract Marek's.

    Far less likely than for an unvaccinated bird, but it can occur.

    edit: Vaccinated birds can also be carriers. The vaccination does not sterilize.
    Last edited: Sep 15, 2009

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