Branton S L, Deaton J W
Avian Dis. 1985 Jul-Sep;29(3):832-7.
Three strains of commercial leghorns vaccinated at 17 to 22 weeks of age with F strain Mycoplasma gallisepticum (MG) were maintained through 117 weeks of age. The three strains differed in both mortality and percent egg production per hen housed; however, the strains did not differ in egg weight (EW), eggshell strength (ESS), or percent daily egg production. Results of this study indicate EW and ESS for F strain MG-vaccinated hens follow patterns previously reported for uninfected layers. Further, mortality may account, in part, for differences in percent egg production per hen housed between strains of F strain MG-vaccinated hens.
三株在17至22周龄时用鸡毒支原体（MG）F株疫苗接种的商品来航鸡饲养至117周龄。这三株鸡在死亡率和每只入舍母鸡的产蛋率方面存在差异；然而，这三株鸡在蛋重（EW）、蛋壳强度（ESS）或日产蛋率方面没有差异。本研究结果表明，接种MG F株疫苗的母鸡的EW和ESS遵循先前报道的未感染蛋鸡的模式。此外，死亡率可能部分解释了接种MG F株疫苗的不同鸡株之间每只入舍母鸡产蛋率的差异。
