PROCEEDINGS OF THE SIXTIETH WESTERN POULTRY DISEASE CONFERENCE March 20-23, 2011 Sacramento, CA ©2011 Western Poultry Disease Conference ii SPECIAL ACKNOWLEDGMENTS The 60th Western Poultry Disease Conference (WPDC) is honored to acknowledge the many contributions and support to the Conference. The financial contributions provide support for outstanding presentations and to help pay for some of the costs of the Conference, thus helping us to maintain a relatively low registration fee for an international conference. More than 40 organizations, companies and individuals have once again given substantial financial support. Many companies and organizations, including some that also contribute financially, send speakers at no expense to the Conference. We thank all these people, and acknowledge their support and contribution. The WPDC is extremely honored to give a special acknowledgement to Pfizer Poultry Health who contributed at the Super Sponsors level by sponsoring our electronic proceedings. In addition, WPDC is pleased to acknowledge our Benefactor contributors, American Association of Avian Pathologists, Inc., Intervet/ Schering- Plough Animal Health and Merial Inc. Once again, the WPDC is forever grateful to our distinguished Patrons, Donors, Sustaining Members, and Friends of the Conference who are just as important in making the conference a success. All our contributors and supporters are listed on the following pages. We greatly appreciate their generosity and sincerely thank them and their representatives for supporting the WPDC. Dr. Larry Allen, Program Chair for the 60th WPDC, would especially like to thank all those who submitted titles for their contributions to the success of this year’s conference. Without their substantial efforts the Conference could never come to fruition. I extend sincere thanks also to all the presenters while we worked together to organize the program. Some presenters originally requested poster presentations and were willing to change to an oral presentation of their paper, or vice versa. This flexibility on the presenters’ part helped keep us within time and space constraints of the program and the poster viewing room. Many thanks to my colleagues on the WPDC Executive Committee for their kind assistance and advice during the preparation of this program. Thanks also to the moderators who graciously accepted the opportunity to serve the Conference and keep the sessions orderly and on time. Finally, I gratefully acknowledge the assistance of the Staff at UCD Conference Events and Visitors Services for registering and assisting our guests and making the conference come together. Thank you again, one and all who made this milestone 60th WPDC a reality. Many have provided special services that contribute to the continued success of this conference. For this year’s meeting, the WPDC has contracted Conference Events & Visitor Services, of the University of California, Davis, for providing budgetary support for the conference. We would like to thank Ms. Stephanie Horgan and Ms. Teresa Brown for their work with our conference. We thank Dr. David Frame for editing and producing another outstanding Proceedings of this meeting. Dr. Frame is indebted to Ms. Sherry Nielson for her tireless dedication in proofreading and formatting the Proceedings for publication. We express our gratitude to all authors who submitted manuscripts. A special thanks goes to Pfizer Poultry Health for their monetary sponsoring of the flash drives for this year’s meeting. We again acknowledge and thank Ominpress (Madison, WI) for the handling and printing of this year’s Proceedings and for electronic reproduction of the meeting proceedings on flash drives. Once again, we acknowledge Bruce Patrick (Graphic Communications, Brigham Young University) for the cover design of the printed Proceedings. iii 60th WPDC CONTRIBUTORS LIST 2011 SUPER SPONSOR Pfizer Poultry Health Division Durham, NC BENEFACTORS American Association of Avian Pathologists Jacksonville, FL Intervet / Schering-Plough Animal Health Millsboro, DE Merial Gainesville, GA 2011 PATRONS ANECA México DF, México Lohmann Animal Health International Winslow, ME Bayer Healthcare LLC Luminex Corporation Shawnee Mission, KS Austin, TX CEVA Biomune Company Maple Leaf Farms, Inc. Lenexa, KS Milford, IN Nippon Biologicals, Inc. Foster Poultry Farms Tokyo, Japan Livingston, CA NOVUS International, Inc. Hygieia Biological Laboratories St. Louis, MO Woodland, CA Synbiotics Corporation IDEXX Laboratories, Inc. Kansas City, MO Westbrook, ME 2011 DONORS Alltech BioChek USA Lexington, KY Gorham, ME American College of Poultry Veterinarians California Poultry Federation, Inc. Jackson, FL Modesto, CA Aviagen, Inc. Charles River Huntsville, AL Storrs, CT iv Cobb Vantress Hy-Line International Siloam Springs, AR Dallas Center, IA Cutler Associates International Laboratorio Avi-Mex SA de CV Moorpark, CA México City, DF, México Danisco Animal Nutrition Phibro Animal Health Waukesha, WI Fairfield, NJ Eli Lilly and Company / Elanco Animal Health Poultry Health Services, Ltd. Indianapolis, IN Airdrie, AB, Canada Marion Garcia, DVM Sunrise Farms, Inc. Team Borlaug MNF-W, USARC Catskill, NY G. Yan Ghazikhanian, DVM, PhD, DACPV Vega Farms Sonoma, CA Davis, CA Marion A. Hammarlund, DVM Veterinary Service, Inc. Riverside, CA Salida, CA 2011 SUSTAINING MEMBERS Aviagen Turkeys Vetoquinol Canada Lewisburg, WV Lavaltrie, QC, Canada Pacific Egg & Poultry Association Walco International, Inc. Sacramento, CA Ceres, CA Vetech Laboratories, Inc. Richard Yamamoto, PhD Guelph, ON, Canada Davis, CA 2011 FRIENDS OF THE CONFERENCE AgriStats, Inc. Diestel Turkey Ranch Fort Wayne, IN Sonora, CA Arthur A. Bickford, VMD, PhD J.S. West Milling Company Turlock, CA Modesto, CA Canadian Poultry Consultants, Ltd. Lasher Associates, Inc. Abbotsford, BC, Canada Millsboro, DE Demler Enterprises Masakazu Matsumoto, DVM, PhD Wasco, CA Corvallis, OR Merrill’s Poultry Farm, Inc. Paul, ID v 60th WESTERN POULTRY DISEASE CONFERENCE OFFICERS PRESIDENT PROCEEDINGS EDITOR Dr. Nancy Reimers Dr. David Frame PO Box 336 Utah Veterinary Diagnostic Laboratory, Gustine, CA 95322 Central Utah Branch 1451 South Main PROGRAM CHAIR Nephi, UT 84648 Dr. Larry Allen Office: (435) 283-7586 Animal Health Branch Cell: (435) 851-2233 California Dept. of Food & Agriculture [email protected] 1220 N Street, A-107 Sacramento, CA 95814 PROGRAM CHAIR-ELECT SECRETARY-TREASURER Dr. Vern Christensen Dr. Richard P. Chin PO Box 126 California Animal Health & Food Safety Mona, UT 84645 Laboratory System - Tulare 18830 Road 112 MEETING SUPPORT CHAIR Tulare, CA 93274-9042 Dr. Yan Ghazikhanian [email protected] 60th WPDC PROCEEDINGS The Proceedings of the 60th Western Poultry Disease Conference are not refereed, but are presented as a service and a source of information to those attending the conference and to others who wish to gain some insight as to the information presented. Copies of the Proceedings are available in either book or electronic formats. NOTE: The electronic version of the proceedings of the 60th WPDC is a 5-year compilation, containing proceedings from the 56th through the 60th WPDC. Copies of these Proceedings are available from: Dr. R. P. Chin CAHFS-Tulare University of California, Davis 18830 Road 112 Tulare, CA 93274-9042 [email protected] Price per copy (includes shipping & handling): Book and electronic format (sold together) US$25.00 for USA shipment. US$22.00 for AAAP members and orders of 5 or more for USA. US$28.00 for Canada and Mexico. US$30.00 for all other countries. Book or electronic format (sold separately) US$20.00 for USA shipment. US$17.00 for AAAP members and orders of 5 or more for USA. US$23.00 for Canada and Mexico. US$24.00 for all other countries. Still available… 50th WPDC Anniversary CD-ROM. This CD contains all printed proceedings of the first fifty Western Poultry Disease Conference meetings. Copies can be purchased from the AAAP: E-mail: [email protected]. Web: http://www.aaap.info. Five-year Compilation (2002–2006) Proceedings of the WPDC. This CD contains the printed proceedings of the 51st through the 55th Western Poultry Disease Conferences. Copies can be purchased from the WPDC Secretary-Treasurer. vi MINUTES OF THE 59TH WPDC ANNUAL BUSINESS MEETING Secretary-Treasurer Chin called the meeting to order on Monday, 19th April 2010, at 5:00 PM, at the Fairmont Hotel Vancouver, Vancouver, BC, Canada. There were 24 people in attendance. APPROVAL OF 58th WPDC BUSINESS MEETING MINUTES The minutes from the 58th WPDC business meeting were reviewed and a motion was carried to approve them as printed in the Proceedings of the 59th WPDC. ANNOUNCEMENTS Dr. Chin acknowledged all the contributors; in particular, those contributing at the Benefactor level, which included the American Association of Avian Pathologists, Intervet/Schering-Plough Animal Health and Pfizer Poultry Health. He also thanked all the contributors for their generous donations. The efforts of the current WPDC officers were acknowledged for their work and participation in the organization of this year’s meeting. Dr. Chin asked that we remember Dr. Charles Whiteman and Mr. Lloyd Merrill (Merrill’s Poultry Farm, Paul, ID), who passed away the past year. REPORT OF THE SECRETARY-TREASURER Dr. R. Chin presented the Secretary-Treasurer report. First, he discussed the budget for the 57th WPDC in Mexico. Previously, he did not report all the expenses to ANECA for the budget. There was a net gain of $49,402.02 which ANECA agreed to distribute equally with WPDC. Hence, there was an overall gain of $24,701.01 for WPDC. Since ANECA raised more than three times the amount in sponsor/exhibitors contribution, the WPDC Executive Committee agreed to ask ANECA if, rather than give a lump payment to WPDC, that they would contribute at least US$1000 each year to WPDC. ANECA agreed to do so. Dr. Chin then discussed the budget for the 58th WPDC. There were only 184 registrants – a 10% decrease from the expected 200 registrants. There was $24,050 in contributions with a total income of $59,525. Total expenses were $72,562.85, for a net loss of -$13,037.85. The current balance in the WPDC account was $61,600.85.