Characteristics of H7N2 (nonpathogenic) avian influenza virus infections in commercial layers, in Pennsylvania, 1997-98.

@article{Ziegler1999CharacteristicsOH,
  title={Characteristics of H7N2 (nonpathogenic) avian influenza virus infections in commercial layers, in Pennsylvania, 1997-98.},
  author={Andre F. Ziegler and Sherrill Davison and Helen Acland and Robert J. Eckroade},
  journal={Avian diseases},
  year={1999},
  volume={43 1},
  pages={
          142-9
        }
}
Between January 1997 and March 1998, 11 cases of H7N2 avian influenza (nonpathogenic) were diagnosed at the Laboratory of Avian Medicine and Pathology, Kenneth Square, PA. These cases involved either commercial leghorn laying hens or leghorn pullets raised in Pennsylvania. Grossly and histologically, the most striking lesion associated with disease was salpingitis, usually with edema and occasionally with oviduct necrosis. Fluid, fibrinous, and egg yolk material in the peritoneum (egg yolk… CONTINUE READING

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