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The Occurrence of Avian Influenza A Subtype H6N2 in Commercial Layer Flocks in Southern California (2000-02): Clinicopathologic Findings

Hailu Kinde, Deryck H. Read, Barbara M. Daft, Marion Hammarlund, Janet Moore, Francisco Uzal, Jenee Mukai and Peter Woolcock
Avian Diseases
Vol. 47, Special Issue. Proceedings of the Fifth International Symposium on Avian Influenza (2003), pp. 1214-1218
Stable URL: http://www.jstor.org/stable/1593425
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Occurrence of Avian Influenza A Subtype H6N2 in Commercial Layer Flocks in Southern California (2000-02): Clinicopathologic Findings
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Abstract

Between February 2000 and February 2002, the California Animal Health and Food Safety Laboratory System diagnosed 26 cases of low-pathogenic H6N2 avian influenza from 12 commercial egg-laying farms. The most common gross and histologic lesions observed in infected chickens were fibrinous yolk peritonitis, salpingitis, oophoritis, and nephritis. Edema of the mesentery of the oviduct and pale, swollen kidneys were also observed. Mortality in infected flocks ranged from 0.25% to 3%, and egg production dropped 7% to 40%. /// Entre Febrero del año 2000 y Febrero del 2002, el Sistema de Laboratorios en Salud Animal y Seguridad de los Alimentos diagnosticó 26 casos de influenza aviar H6N2 de baja patogenicidad en 12 parvadas de gallinas de postura comerciales. Las lesiones macroscópicas e histológicas más comunes observadas en los pollos infectados fueron peritonitis fibrinosa con presencia de yema, salpingitis, ooforitis y nefritis. Se observó también edema del mesenterio del oviducto y riñones pálidos e inflamados. La mortalidad en parvadas infectadas se ubicó en un rango de 0.25% a 3% y la producción de huevo disminuyó entre un 7% a un 40%.

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