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1 January 2003 Effects of an S6 Strain of Mycoplasma gallisepticum Challenge at Onset of Lay on Digestive and Reproductive Tract Characteristics in Commercial Layers
T. A. Parker, S. L. Branton, M. S. Jones, E. D. Peebles, P. D. Gerard, K. O. Willeford, G. T. Pharr, W. R. Maslin
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Abstract

Mycoplasma gallisepticum (MG), a reproductive/respiratory pathogen in poultry, has been 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 20 wk of age. The S6 inoculation had no effect on bird weight, egg production, digestive tract weight and length, or histopathologic lesion scores, although significant differences were noted in the lengths and weights of various portions of the reproductive tract. This study shows that S6MG inoculation does not detrimentally affect layer hen performance when in the absence of environmental stressors customary to a caged layer facility.

T. A. Parker, S. L. Branton, M. S. Jones, E. D. Peebles, P. D. Gerard, K. O. Willeford, G. T. Pharr, and W. R. Maslin "Effects of an S6 Strain of Mycoplasma gallisepticum Challenge at Onset of Lay on Digestive and Reproductive Tract Characteristics in Commercial Layers," Avian Diseases 47(1), 96-100, (1 January 2003). https://doi.org/10.1637/0005-2086(2003)047[0096:EOASSO]2.0.CO;2
Received: 30 May 2002; Published: 1 January 2003
KEYWORDS
egg production
Mycoplasma gallisepticum
S6
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