title: Egg production, egg weight, eggshell strength, and mortality in three strains of commercial layers vaccinated with F strain Mycoplasma gallisepticum.
abstract: 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.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000627:therapeutic use; D002645:Chickens / Q000254:growth & development / Q000502:physiology*; D004528:Egg Shell; D005260:Female; D009164:Mycobacterium Infections / Q000517:prevention & control / Q000662:veterinary*; D010058:Oviposition; D011201:Poultry Diseases / Q000517:prevention & control*
chemical_list: D001428:Bacterial Vaccines