Mycoplasma gallisepticum Vaccination: Effects on Egg Transmission and Egg production

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Abstract
The effects of M. gallisepticum (MG) vaccination on egg transmission of MG and egg production were evaluated. Leghorn hens vaccinated with live MG (strain F), with strain F plus MG bacterin, with 1 dose of MG bacterin or with 2 doses of MG bacterin all transmitted MG through the egg at a significantly lower level than unvaccinated controls. Hens vaccinated with 2 doses of MG bacterin had the longest lag before detectable transmission of MG through the egg. All vaccinated groups were protected against the egg production drop seen in unvaccinated hens challenged with virulent MG.

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