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PROCEEDINGS of the FIFTIETH WESTERN POULTRY DISEASE CONFERENCE March 24-26, 2001

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PROCEEDINGS of the FIFTIETH WESTERN POULTRY DISEASE CONFERENCE March 24-26, 2001 PROCEEDINGS OF THE FIFTIETH WESTERN POULTRY DISEASE CONFERENCE March 24-26, 2001. University of California, Davis, California WPDC SPECIAL RECOGNITION AWARD FOR DONALD D. BELL Don Bell was born in Santa Ana, California, on 17th December 1933. He was raised on an egg ranch in Central California and attended Turlock High School. Don graduated from the University of California, Davis, with a BS degree in Poultry Science in 1955. He received an MS degree in Poultry Science from Colorado State University in 1972. Don was hired as a UC Poultry Farm Advisor for Orange County in 1958, and transferred to Riverside County in 1965. He was promoted to Poultry Specialist in 1983. Don, whose career is highlighted by numerous accomplishments and awards, retired in 2000. Don completed over 150 applied research projects, and published 11 refereed journal articles, 16 abstracts and 57 research reports. In addition, he is author or co-author of 3 book chapters, 318 trade journal articles, 160 county publications, 70 slide sets, 12 computer programs and thousands of newsletter articles. His greatest contribution has been in the area of extension education, primarily on management and nutrition of egg production pullets and laying hens. Don is currently the past-President of the Poultry Science Association (PSA). He was also associate editor of the PSA journal and a PSA director. Don has received numerous awards including the PSA Pfizer Extension Award, USDA Award for Superior Service, UC Distinguished Service Award, and the Pacific Egg and Poultry Association Person of the Year and the Poultry Scientist of the Year awards. Don enjoys golfing and fishing, and traveling with his wife, Lucy. They have two children, Sharon and Warren. Don plans to continue working part-time for the UC Extension on a few pet projects and to consult with United Egg Producers. The WPDC is honored to recognize Don Bell for his contributions to the poultry industry. WPDC SPECIAL RECOGNITION AWARD FOR DR. ARTHUR BICKFORD Dr. Art Bickford was born and raised on a dairy farm in Conventry, Vermont, in 1936. After 2 years of undergraduate studies at the University of Vermont, Dr. Bickford was accepted into the veterinary medicine program at the University of Pennsylvania, where he graduated with his VMD in 1960. Dr. Bickford then did a year of graduate work at both the University of Vermont and Colorado State University before heading to Purdue University. In 1964, he obtained his MS, and in 1966 his PhD, both from Purdue University. Dr. Bickford has held numerous positions as a pathologist within universities and industries. He traveled back- and-forth across the country before accepting the position in 1975 as an extension veterinarian with the University of California, filling the position previously held by Dr. A.S. Rosenwald. In 1979, Dr. Bickford moved back to Missouri to become the head of the Department of Veterinary Pathology at the University of Missouri. However, after 4 years, Dr. Bickford realized his mistake and returned to sunny (and non-humid and tornado-less) California as the Branch Chief of the Turlock lab for the California Animal Health and Food Safety Laboratory System (CAHFS), of the School of Veterinary Medicine, University of California, Davis. In 1992, Dr. Bickford became the Associate Director for CAHFS, and continues in this position until his retirement in June 2001. Dr. Bickford’s contribution to the poultry industry has been tremendous. He is now recognized as one of the foremost avian pathologist in the country and as such was awarded the American Association of Avian Pathologists’ C.A. Bottorff award in 1995. He served on numerous educational and scientific committees, and editorial boards. He is an author on 90 publications in refereed journals, 23 book chapters, and 141 abstracts or proceeding articles. In addition, Dr. Bickford is currently past-president of the Western Veterinary Conference, and for some reason truly enjoys his annual trips to the meetings in Las Vegas. Dr. Bickford and his wife Margaret, have three daughters, Carolyn, Patricia and Andrea, all of whom live in the mid-West. They are blessed with three grandchildren, Alexandra, Matthew and Daniel, and look forward to getting in their first class RV and traveling across the country to visit them. ii SPECIAL ACKNOWLEDGMENTS The Western Poultry Disease Conference (WPDC) is honored to acknowledge the many contributions to the Conference. These contributions provide support for outstanding participants and to help pay for some of the costs of the Conference. Approximately 50 organizations, companies and individuals have given substantial financial support. Many companies and organizations, including some that also contribute, send speakers at no expense to the Conference. We thank all these people, and acknowledge their support and contribution. We are extremely pleased to acknowledge three contributors at the Super Sponsor level. They are the American Association of Avian Pathologists, Merial, Inc. and Positive Action Publications. In addition, we would like to recognize the American Association of Avian Pathologists, IDEXX Laboratories, Inc., Lohmann Animal Health International and Nippon Biologicals, Inc. as Benefactors. Once again, our distinguished Patrons, Donors, Sustaining Members, and Friends of the Conference are listed on the following pages. We greatly appreciate their generosity and say thanks to them and their representatives. Thanks and appreciations are due to Dr. Ken Takeshita, for taking over as the Program Chair at the last minute, especially before he realized what he was getting into! Ken has put together an excellent program, and with 50% more titles submitted this year than normally, he had a particularly tough time arranging the program. Many have provided special services that contribute to the continued success of this conference. The WPDC would like to thank Ms. Nicole Gibson and the Center for Avian Biology for their secretarial support to Dr. “Rosy” Rosenwald; Gina Hardwood, Kim Buckner, Yvette Valesquez, Judy Brooks and the University of California, Veterinary Medicine Extension/Public Programs for administering the contributions and financial services; Dr. Rosenwald for once again garnering the outstanding contributions; and to all others who contributed to the program and conference. A special thanks goes to Dr. Carol Cardona for local arrangements this year. As you know, the 50th WPDC is located on the campus of UC Davis. The last time we met in Davis was in 1988. Many things have changed since then and numerous arrangements were necessary to organize the location of the meeting rooms, especially with the change to double sessions, and the catering. We are especially grateful to Carol for her untold hours of work for WPDC. We acknowledge and appreciate Ms. Lina Layiktez and her crew at the University of California, Davis, Conference and Event Services, who handle the registration and administrative duties of this conference. We thank Dr. David Frame for accepting the position as Proceedings Editor and for editing and producing an outstanding Proceedings. We look forward to continued excellence with the WPDC Proceedings and hope Dave is now ready for the joint meeting with ANECA next year. A special appreciation is in order for Sherry Nielson, Senior Secretary of The Utah State University Turkey Research Center, for her untiring and seemingly endless work of proofreading and formatting the Proceedings for publication. We express our gratitude to all authors who submitted manuscripts – especially those who followed the instructions and submitted their papers on time! We again acknowledge and thank Ms. Rebecca Dodson and Ominpress, Madison, Wisconsin, for the handling and printing of this year’s Proceedings. Once again, we thank Bruce Patrick (Graphic Communications, Brigham Young University) for the cover design. iii 2001 SUPER SPONSORS American Association of Avian Pathologists Kennett Square, PA Merial, Inc. Gainesville, GA International Poultry Production East Yorkshire, England 2001 BENEFACTORS American Association of Avian Pathologists Intervet, Inc. Kennett Square, PA Millsboro, DE EMBREX, Inc. Lohmann Animal Health International – Research Triangle Park, NC MBL, Vineland Gainesville, GA IDEXX Laboratories, Inc. Westbrook, ME Nippon Biologicals, Inc. Tokyo, Japan 2001 PATRONS Jones-Hamilton Co. – PLT Synbiotics Corporation Salisbury, MD Kansas, MO Productos Toledano, S.A. Veterinary Service, Inc. Panama City, Panama Salida, CA Sunrise Farms, Inc. Catskill, NY 2001 DONORS Alltech Biotechnology Centre, Inc. Boehringer Ingelheim Vetmedica, S.A. de C.V. Guelph, Ontario, Canada Guadalajara, Jalisco, Mexico ANECA Charles River, SPAFAS, Inc. Mexico City, DF, Mexico Storrs, CT Bachoco S.A. de C.V. Gregg Cutler, DVM, MPVM Celaya, GTO, Mexico Moorpark, CA Bayer Intensive Production Unit Fort Dodge Animal Health Shawnee Mission, KS Overland Park, KS Biomune, Inc. Foster Poultry Farms, Inc. Lenexa, KS Livingston, CA iv Hubbard ISA LLC Chattanooga, TN Perdue Farms, Inc. Salisbury, MD Hy-Line International West Des Moines, IA Pharmacia & Upjohn Co. Staunton, VA Lasher Associates, Inc. Millsboro, DE A.S. (Rosy) & Jo Rosenwald (In memory of Paul DeLay) Moroni Feed Company, Inc. Davis, CA Moroni, UT 2001 SUSTAINING MEMBERS Alternative Design Manufacturing Orlopp Turkey Breeding Farms Siloam Springs, AR Orosi, CA Aviagen North America Preserve International Huntsville, AL Turlock, CA Creighton Brothers LLC Schering-Plough Animal Health/ASL Santa Rosa,
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