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; Peter Woolcock

doi:10.1637/0005-2086-47.s3.1214

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Hailu Kinde,¹ Deryck H. Read,¹ Barbara M. Daft,¹ Marion Hammarlund,² Janet Moore,¹ Francisco Uzal,¹ Jenee Mukai,¹ Peter Woolcock³

¹California Animal Health and Food Safety Laboratory, 105 W. Central Avenue San Bernardino Branch, San Bernardino, CA 92408
²P.O. Box 7698, Riverside, CA 97698
³California Animal Health and Food Safety Laboratory, Fresno Branch, School of Veterinary Medicine, 2789 South Orange Avenue, University of California, Davis, CA 93725

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%.

Citation Download Citation

Hailu Kinde, Deryck H. Read, Barbara M. Daft, Marion Hammarlund, Janet Moore, Francisco Uzal, Jenee Mukai, and Peter Woolcock "The Occurrence of Avian Influenza A Subtype H6N2 in Commercial Layer Flocks in Southern California (2000–02): Clinicopathologic Findings," Avian Diseases 47(s3), 1214-1218, (1 September 2003). https://doi.org/10.1637/0005-2086-47.s3.1214

Received: 14 April 2002; Published: 1 September 2003

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