Do you having any citations supporting your thesis that mareks is spread on eggs? My understand it is not. It is spread chicken to chicken.
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Debbie292d
Marek's disease is spread by direct and indirect contact. Dander of infected chickens is laden with Marek's disease. A hen with Marek's can shed Marek's dander onto her eggs. These eggs are then put in the incubator endangering new chicks that hatch will be infected via the outside of the eggs. I just put two links into the article that explains Marek's and how it spreads. Thanks for the suggestion.