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Cjvr Vol77 No4.Pdf Provided for non-commercial research and education use. Not for reproduction, distribution or commercial use. The Canadian Journal of Veterinary Research is published by Canadian Veterinary Medical Association. The attached copy is furnished to readers for personal, non-commercial research and education use. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party Web sites are prohibited. Those who require further information regarding reprints or archiving and manuscript policies are encouraged to contact [email protected]. CanadianCanadian JournalJournal ofof VVeterinaryeterinary RResearchesearch RevueRevue CanadienneCanadienne dede RRechercheecherche VVétérinaireétérinaire Articles An assessment of external biosecurity on southern Ontario swine farms and its application to surveillance on a geographic level Kate Bottoms, Zvonimir Poljak, Robert Friendship, Rob Deardon, Janet Alsop, Cate Dewey ................ 241 A retrospective study on the etiological diagnoses of diarrhea in neonatal piglets in Ontario, Canada, between 2001 and 2010 Gloria Chan, Abdolvahab Farzan, Josepha DeLay, Beverly McEwen, John F. Prescott, Robert M. Friendship ..... 254 Species-specificity of equine and porcine Lawsonia intracellularis isolates in laboratory animals Francesca Sampieri, Fabio A. Vannucci, Andrew L. Allen, Nicola Pusterla, Aphroditi J. Antonopoulos, Katherine R. Ball, Julie Thompson, Patricia M. Dowling, Don L. Hamilton, Connie J. Gebhart ........ 261 Analgesic and motor effects of a high- volume intercoccygeal epidural injection of 0.125% or 0.0625% bupivacaine in adult cows Eva Rioja, Luis M. Rubio-Martínez, Gabrielle Monteith, Carolyn L. Kerr ........ 273 The use of lung biopsy to determine early lung pathology and its association with health and production outcomes in feedlot steers Brandy A. Burgess, Steve H. Hendrick, Colleen M. Pollock, Sherry J. Hannon, Sameeh M. Abutarbush, Amanda Vogstad, G. Kee Jim, Calvin W. Booker ............. 281 Reversible chemical restraint of free-range cattle with a concentrated combination of tiletamine-zolazepam, ketamine, and detomidine Michela Re, Francisco J. Blanco-Murcia, José Maria San Miguel, Ignacio A. Gómez de Segura ............. 288 Effect of storage time and temperature on the total protein concentration and electrophoretic fractions in equine serum Daniela Alberghina, Stefania Casella, Claudia Giannetto, Simona Marafioti, Giuseppe Piccione ..................... 293 October/Octobre 2013, Vol. 77 No. 4 table of contents continued on back cover/ la table des matières se poursuit sur la couverture arrière FOR PERSONAL USE ONLY Established in 1937 ISSN 0830-9000 Canadian Journal of Revue canadienne de Veterinary Research recherche vétérinaire Formerly CANADIAN JOURNAL OF COMPARATIVE MEDICINE Remplace la REVUE CANADIENNE DE MÉDECINE COMPARÉE The journal publishes the results of original research in veterinary La revue publie les résultats de recherches originales en médecine and comparative medicine. Manuscripts must be as concise as pos- vétérinaire et comparative. Les manuscrits doivent être aussi brefs que sible, and the research described must represent a significant con- possible et la recherche décrite doit apporter une contribution impor- tribution to knowledge in veterinary medicine. Full-length papers, tante à la médecine vétérinaire. Les exposés complets, les communi- short communications, and review papers are welcome. All manu- cations brèves et les comptes rendus sont bienvenus. Nous vérifier ons scripts will be reviewed for scientific content and editorial accuracy. le fonds scientifique et la forme de tous les manuscrits. Manuscripts must conform to the Instructions for Authors found Les manuscrits doivent être conformes aux directives aux auteurs on the CVMA Web site. Consultation of a recent issue of the journal qui se trouvent sur le site Web de l’ACMV. La consultation d’un to ensure that the manuscript conforms to current style is also recom- récent numéro de la revue est aussi profitable, afin de s’assurer qu’un mended. Please use the Web site (www.canadianveterinarians.net) manuscrit se conforme au style courant. Veuillez utiliser le site Web to submit articles. A publication charge of $90 per published page, (www.veterinairesaucanada.net) pour soumettre les articles. Les plus a cost of $10 per table, $15 per illustration, and $150 per color auteurs doivent acquitter des frais de 90 $ par page publiée, 10 $ illustration is payable by contributors. Instructions for ordering pour chaque tableau, 15 $ pour chaque illustration, et 150 $ pour reprints are sent with the galley proofs. Color illustrations will only chaque illustration en couleur. Un formulaire de commande de be published if the author(s) agree to pay the extra cost. tirés à part accompagne l’en voi des épreuves d’un manuscrit. Les illustrations en couleurs ne seront publiées que si les auteurs en assument les frais supplémentaires. Canadian Journal of Veterinary Research Abstracted and/or indexed in:/Résumé et/ou catalogué dans : Revue canadienne de recherche vétérinaire Biological Abstracts Index Veterinarius Editor — Rédacteur Chemical Abstracts Nutrition Abstracts Éva Nagy, Guelph, Ontario Current Contents (Agric. Section) Science Citation Index Associate Editor — Rédacteur adjoint EMBASE/Excerpta Medica Veterinary Bulletin Deborah M. Haines, Saskatoon, Saskatchewan Index Medicus Derwent Veterinary Assistant Editors — Assistants à la rédaction Drug File Serge Messier, Saint-Hyacinthe (Québec) Jeffrey J. Wichtel, Charlottetown, Prince Edward Island Managing Editor — Directrice de la rédaction Heather Broughton, Ottawa, Ontario Assistant Managing Editor — Directrice adjointe à la rédaction Stella Wheatley, Ottawa, Ontario Advertising Manager — Gérante de la publicité Laima Laffitte, Wendover, Ontario Editorial Coordinator/Coordonnatrice de la rédaction Beverley Kelly, Ottawa, Ontario Address all correspondence to/Adresser toute correspondance à : Canadian Journal of Veterinary Research Typesetting/Typographie Revue canadienne de recherche vétérinaire AN Design Communications 339, rue Booth Street, Ottawa, Ontario K1R 7K1 www.an-design.ca Tel./Tél. : (613) 236-1162 — Fax/Télécopieur : (613) 236-9681 e-mail/Courriel : [email protected] © Canadian Veterinary Medical Association 2013. L’Association canadienne des médecins vétérinaires 2013 Subscriptions/Abonnements — 2013 Published quarterly by the Canadian Veterinary Medical Association Canada $150 $ ( applicable GST/HST; Publication trimestrielle de l’Association canadienne des TPS/TVH en vigueur) médecins vétérinaires Foreign/Étranger $165 $ US/É.-U. Return undeliverable Canadian addresses to: 339 rue Booth Street, Ottawa, Ontario K1R 7K1, e-mail: [email protected] FOR PERSONAL USE ONLY Article An assessment of external biosecurity on southern Ontario swine farms and its application to surveillance on a geographic level Kate Bottoms, Zvonimir Poljak, Robert Friendship, Rob Deardon, Janet Alsop, Cate Dewey Abstract Risk-based surveillance is becoming increasingly important in the veterinary and public health fields. It serves as a means of increasing surveillance sensitivity and improving cost-effectiveness in an increasingly resource-limited environment. Our approach for developing a tool for the risk-based geographical surveillance of contagious diseases of swine incorporates information about animal density and external biosecurity practices within swine herds in southern Ontario. The objectives of this study were to group the sample of herds into discrete biosecurity groups, to develop a map of southern Ontario that can be used as a tool in the risk-based geographical surveillance of contagious swine diseases, and to identify significant predictors of biosecurity group membership. A subset of external biosecurity variables was selected for 2-step cluster analysis and latent class analysis (LCA). It was determined that 4 was the best number of groups to describe the data, using both analytical approaches. The authors named these groups: i) high biosecurity herds that were open with respect to replacement animals; ii) high biosecurity herds that were closed with respect to replacement animals; iii) moderate biosecurity herds; and iv) low biosecurity herds. The risk map was developed using information about the geographic distribution of herds in the biosecurity groups, as well as the density of swine sites and of grower-finisher pigs in the study region. Finally, multinomial logistic regression identified heat production units (HPUs), number of incoming pig shipments per month, and herd type as significant predictors of biosecurity group membership. It was concluded that the ability to identify areas of high and low risk for disease may improve the success of surveillance and eradication projects. Résumé La surveillance basée sur le risque devient de plus en plus importante dans les domaines de la médecine vétérinaire et de la santé publique. Elle sert comme moyen d’augmenter la sensibilité de la surveillance et d’améliorer l’efficacité des coûts dans un environnement de plus en plus limité en ressources. Notre approche pour développer un outil pour la surveillance géographique basée sur le risque de maladies contagieuses porcines incorpore des informations sur la densité animale et les pratiques de biosécurité externes dans des troupeaux porcins du sud de l’Ontario. Les objectifs de cette étude étaient de grouper l’échantillon de troupeaux en groupes
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