Effects of an S6 Strain of Mycoplasma gallisepticum Challenge Before Beginning of Lay on Various Egg Characteristics in Commercial Layers

SUMMARY. Mycoplasma gallisepticum (MG) is a reproductive/respiratory disease in poultry implicated in suboptimum egg production and decreased hatchability. Commercial layer hens raised in a controlled environment were inoculated with the S6 strain of MG at 10 wk of age. Egg production and selected egg and egg quality parameters were quantitated over the entire lay cycle for inoculated and control birds. The S6 inoculation had no effect on bird weight, egg production, associated egg quality parameters, or histopathologic lesion scores. This study shows that in the absence of environmental stressors a prelay S6 MG inoculation does not produce detrimental effects on layer hen performance.

[1]  J. D. May,et al.  The effects of F strain Mycoplasma gallisepticum, Mycoplasma synoviae, and the dual infection in commercial layer hens over a 44-week laying cycle when challenged before beginning of lay. II. Egg size distribution. , 1999, Avian diseases.

[2]  A. Silim,et al.  Lymphoproliferative responses of specific-pathogen-free chickens to Mycoplasma gallisepticum strain PG31. , 1998, Avian pathology : journal of the W.V.P.A.

[3]  B. Charleston,et al.  Assessment of the efficacy of tilmicosin as a treatment for Mycoplasma gallisepticum infections in chickens. , 1998, Avian pathology : journal of the W.V.P.A.

[4]  J. D. May,et al.  The effects of F strain Mycoplasma gallisepticum, Mycoplasma synoviae, and the dual infection in commercial layer hens over a 44-week laying cycle when challenged before beginning of lay. I. Egg production and selected egg quality parameters. , 1997, Avian diseases.

[5]  D. Ley,et al.  Antibody responses of chickens to inoculation with Mycoplasma gallisepticum membrane proteins in immunostimulating complexes. , 1996, Avian diseases.

[6]  C. Boyle,et al.  Effects of dietary thiouracil on thyroid activity, egg production, and eggshell quality in commercial layers. , 1994, Poultry science.

[7]  J. D. Simmons,et al.  Design of a poultry disease isolation facility with programmable environmental control , 1992 .

[8]  J. W. Deaton,et al.  F strain Mycoplasma gallisepticum vaccination of post-production-peak commercial Leghorns and its effect on egg and eggshell quality. , 1988, Avian diseases.

[9]  T E Carpenter,et al.  Economic impact of Mycoplasma gallisepticum and M. synoviae in commercial layer flocks. , 1987, Avian diseases.

[10]  M. Lin,et al.  Comparison of in vivo and in vitro methods for pathogenicity evaluation for Mycoplasma gallisepticum in respiratory infection. , 1986, Avian pathology : journal of the W.V.P.A.

[11]  J. W. Deaton,et al.  Egg production, egg weight, eggshell strength, and mortality in three strains of commercial layers vaccinated with F strain Mycoplasma gallisepticum. , 1985, Avian diseases.

[12]  S. Branton,et al.  Mycoplasma gallisepticum isolation in layers. , 1984, Poultry science.

[13]  J. Brake,et al.  Effect of the insect growth regulator CGA-72662 (Larvadex) on broiler breeder production, hatchability, and subsequent chick performance. , 1984, Poultry science.

[14]  H. Adler,et al.  Temperature-sensitive mutants of Mycoplasma gallisepticum. , 1984, Journal of comparative pathology.

[15]  S. Kleven Transmissibility of the F strain of Mycoplasma gallisepticum in leghorn chickens. , 1981, Avian diseases.

[16]  A. Pruthi,et al.  Sequential pathology of genital tract in chickens experimentally infected with Mycoplasma gallisepticum. , 1981, Avian diseases.

[17]  T. Carpenter,et al.  Vaccination with F-strain Mycoplasma gallisepticum to reduce production losses in layer chickens. , 1981, Avian diseases.

[18]  F. N. Reece,et al.  The Effect of Loading Rate on the Breaking Force, Deformation, and Stiffness Modulus of Eggs , 1976 .

[19]  D. Jasper,et al.  Agar block technique for identification of mycoplasmas by use of fluorescent antibody. , 1972, Applied microbiology.

[20]  R. Hanson,et al.  A medium for the isolation of avian mycoplasmas. , 1968, American journal of veterinary research.

[21]  M. Tourtellotte,et al.  MYCOPLASMA GALLISEPTICUM‐CONTROL BY IMMUNIZATION , 1967, Annals of the New York Academy of Sciences.

[22]  W. B. Gross,et al.  The Production of Salpingitis of Chickens by Mycoplasma gallisepticum , 1962 .