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OIE Collaborating Centre Reports
Activities in 2010
Title of Collaborating Centre: Animal Disease Surveillance Systems, Risk
Analysis and Epidemiological Modelling
Address of Collaborating Centre:
Centers for Epidemiology and Animal Health
USDA:APHIS:VS:CEAH
2150 Centre Ave., Bldg. B.
Fort Collins, Colorado 80526,
UNITED STATES OF AMERICA
Tel.:
(+1-970) 494.72.00
Fax:
e-mail address:
website:
[email protected]
http://www.aphis.usda.gov/about_aphis/
Name of Head of Centre
(Responsible Official):
Name of OIE Contact Point:
Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
Dr Larry Granger
Dr Cristóbal Zepeda
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Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
The USDA-APHIS-VS Centers for Epidemiology and Animal Health has the following units:
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National Animal Health and Monitoring System (NAHMS)
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National Surveillance Unit (NSU)
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Center for Animal Health Information and Analysis (CAHIA)
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Office of International Collaboration and Coordination (OICC)
Part I: Summary of activities specifically related to the mandate of
OIE Collaborating Centres
1.
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Activities as a centre of research, expertise, standardisation and dissemination of techniques
within the remit of the mandate given by the OIE

CEAH centers collaborated in the development of the Technique for the Assessment of Intervention Options
(TAIO). TAIO is a decision support tool designed to help evaluate and compare the value of different
response options for a particular disease event or incursion. TAIO aids in joining expert and empirical
knowledge, from multiple disciplines, in a transparent and replicable system of analysis.

NAHMS staff member (November 8-12, 2009) presented the results of the Small Enterprise Chicken study to
1,400 participants from 85 countries at the World Veterinary Poultry Congress, held in Marrakesh, Morocco.
Participants included veterinarians in poultry medicine, research, and allied industries.

NAHMS staff member January 27,2010 collaborated with industry representatives on the Poultry 2010 study
at the International Poultry Expo meeting in Atlanta, GA, to finalize the poultry study design.
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NAHMS staff member January 31, 2010 attended the NMC meeting in Albuquerque, NM. The annual
meeting of the NMC attended by people involved in the dairy industry from around the United States and
internationally to provide the latest information on the practices, regulations, etc., that involve the dairy
industry. This meeting provides a forum for one-on-one communication with peers in the industry. NAHMS
staff member presented information on U.S. milk quality during the committee meetings.

NAHMS staff member continued membership in the Canadian Integrated Program on antimicrobial
Resistance Surveillance (CIPARS) on-farm monitoring advisory group.

CAHIA provided vector surveillance methodologies to OIE via the National Veterinary Institute, Technical
University of Denmark.

CAHIA preformed a state-by-state assessment of the risk of introduction of Classical Swine Fever (CSF) into
domestic swine herds in the United States. This assessment provided National Surveillance Unit (NSU) with
a tool to update the CSF surveillance plan for the United States. The tool ranks States using parameters that
identify the States at highest risk of introduction of CSF into domestic swine herds.

CAHIA preformed a risk assessment for the introduction of new world screwworm to the United States,
Mexico and Central America from infested Caribbean countries. The potential change in risk due to
relaxation or removal of trade barriers between the United States and Cuba was also discussed. Collaborators
included NCIE RES, and CEAH OICC.

Drs. Ian Stewart and Monica Brown-Reid of the USDA National Center for Medical Intelligence (NCMI)
assisted the NCMI influenza group in monitoring the spread of highly pathogenic avian influenza (HPAI)
(H5N1) in birds worldwide. The analysts reported new confirmed H5N1 cases in countries or administrative
units where the disease had not been previously reported and contributed written information to NCMI
influenza intelligence products. Examples include researching new HPAI cases in Egypt for the three new
provinces (Al Wadi, Al Jadid, Hilwan, and Luxor); preparing a synopsis of Bhutan first reported case of
HPAI (H5N1); answering questions regarding Brazil's HPAI programs; arranging teleconferences with David
Swayne (USDA, Agricultural Research Service (ARS)) to answer questions about H5N1 genetic shifts in
relation to vaccine resistance; providing website links that discuss the AI wild bird monitoring that began in
Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
2006; researching information pertaining to HPAI (H5N1) in China in birds; and determining if HPAI
occurred in Guatemala and El Salvador.
2.
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Drs. Ian Stewart and Monica Brown-Reid of the USDA National Center for Medical Intelligence (NCMI)
monitored the emergence of novel influenza type A-H1N1 virus and provided worldwide novel A-H1N1
influenza surveillance results for use by the USDA National Swine Surveillance Program. CAHIA analysts
continually monitor and track confirmed cases of A-H1N1 in swine for country surveillance activities
worldwide.

CAHIA provided consultation to the United Nations Food and Agriculture Organization (FAO) in
Rome, Italy during an outbreak of anthrax in Bangladesh in 2010.

CAHIA experts developed and provided training in support of international capacity building in spatial
epidemiology with emphasis on the use of GIS and GPS methods in investigating and reporting disease
outbreaks. This training uses all open source computer software that participants can continue to use after the
training in completed.
Proposal or development of any procedure that will facilitate harmonisation of international
regulations applicable to the surveillance and control of animal diseases, food safety or animal
welfare
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An Animal Health Alert System Based on Argus Animal Health Event Data: Proof of Concept
CAHIA completed a project to evaluate the utility of Argus data to identify emerging animal diseases or
emerging adverse climatic, geographic, environmental or meteorological situations. The objectives of the
project were to: (1) evaluate data from the Argus global collection system to identify potential variables or
signals that may indicate an emerging disease, and (2) develop a proof of concept to establish that structured
data from the Argus collection system can provide early warning of emerging diseases or add additional
information to data that are collected and reported by Argus. Four known emerging diseases were analyzed:
Porcine Respiratory Reproductive Syndrome (PRRS) in China and Vietnam (2006-2007); Bluetongue in
Europe (2006-2007), African Swine Fever in Georgia and former Soviet states (2007) and Bleeding Calf
Syndrome in Europe (2009). By analyzing available Argus data from these time periods, CAHIA found that
structured Argus data have the potential to provide early signals of emerging adverse animal health
conditions. The results of this project were shared with the Argus staff at Georgetown University.

Drs. Cynthia Johnson and Steve Weber and two experts from Texas A&M University travelled to Kazakhstan
in a collaborative effort with the APHIS Foreign Agricultural Service, APHIS International Services and the
U.S. Department of Defense to assess veterinary infrastructure in Kazakhstan. The group met with
agriculture and veterinary officials, made site evaluations laboratories, border posts, universities, and listened
to producer and stakeholder groups. The information was used to produce a comprehensive report of the
veterinary infrastructure in Kazakhstan, focusing on laboratory functions, surveillance, legislation and
education. The report is being used to support efficient allocation of funds to Department of Defense animal
health projects, and to create sustainable and viable surveillance and training systems relative to animal
health within the country.
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CAHIA Animal Health Alerts and Advisories
CAHIA Animal Health Alerts and Advisories are brief reports to notify decision makers within VS of
emerging diseases or important events that would be of immediate concern. Alerts and Advisories are
published within 48 hours of detection of a disease outbreak or threatening condition. Advisories issued in
FY 2010 include:
Alert: Mexico, Classical Swine Fever (12/1/2009)
Alert: Mexico, Suspected Venezuelan Equine Encephalitis (2/16/2010)
Advisory: Japan, Foot and Mouth Disease (4/30/2010)
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Emerging Disease Notice: Bleeding Calf Syndrome
CAHIA published an Emerging Disease Notice on bleeding calf syndrome that was identified in young beef
and dairy calves in multiple European countries. The Emerging Disease Notice summarized what was known
and not known about the disease, likely causes of the disease, investigations being conducted to determine
the cause, and the level of risk of introduction to the United States
Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
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Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
3.
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Summary and Analysis of Recent FMD Outbreaks in Asia
CAHIA completed three consecutive written monthly descriptions of recent outbreaks of foot-and-mouth
disease (FMD) in Asia for the Deputy Administrator’s office. Each analysis included a document that
summarized recent FMD events in Asia, explained what was known and not known about those events, why
these events were important, identified potential risks of introduction to the United States, and outlined
actions and precautions in place to prevent introduction of FMD into the U.S. The analyses included a
timeline of recent FMD events in Asia and maps displaying the spatial distribution of FMD outbreaks over
time.
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Veterinary Health Systems Database
CAHIA collaborated with the National Center for Medical Intelligence (NCMI) to compile information for a
world veterinary health systems database. The objectives of this project are to develop a searchable database
that can be used to: (1) extract foreign country veterinary infrastructure data (animal disease status,
surveillance reports, regulatory structure, veterinary personnel, laboratory capabilities, vaccine administration
and production, etc.), (2) provide the baseline data of worldwide regulatory veterinary systems to
validate/verify/identify deficiencies in open source reporting, (3) produce intelligence assessments that guide
policy makers on issues such as strategic planning, trade facilitation/negotiations and identification of
potential threats to U.S. agriculture, and (4) produce animal health assessments and reports to enhance
situational awareness for Federal planning and operations that need quick access to comprehensive world
veterinary infrastructure information.
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Q Fever: An Emerging Disease in the Netherlands
This emerging disease notice provided the most recent facts about the epidemic of Q fever in the Netherlands
and general background information about the disease. This publication based on a paper written by Ms.
Laura Kotinsley of the University of Florida’s College of Veterinary Medicine, graduating class of 2011. The
publication is available at
http://webdev.aphis.usda.gov/animal_health/emergingissues/diseasenotice/notices.shtml

Developed training materials that promote standardized methods and practices in collecting and reporting
information about the location of disease events.
Placement of expert consultants at the disposal of the OIE
The OIE Terrestrial Animal Health Standards Commission met in 09/10, and requested review of 9 chapters of the
code. NSU reviewed several chapters, including scientific justification for all recommended edits or changes.
A member of CEAH is part of the OFFLU steering committee and leader of the applied epidemiology group
A member of CEAH chairs the OIE ad hoc group on epidemiology
At the request of the OIE, CEAH developed a draft paper on the “Global strategy for FMD control” which was
submitted to the OIE Scientific Commission
Part II: Other activities related to the mandate
of OIE Collaborating Centres
4.
Provision of scientific and technical training, within the remit of the mandate given by the OIE, to
personnel from OIE Members
CEAH established a twinning agreement with the China Animal Health and Epidemiology Center (CAHEC)
Spatial epidemiology training in GPS and GIS methods, using open source computer applications, in disease
investigations was provided to OIE member countries:
January 25 – 31, 2010: Bandung, Indonesia (35 participants)
May 24 – May 28, 2010: Accra, Ghana (30 participants)
May 31 – June 4, 2010: Abuja, Nigeria (25 participants)
September 12 – 19, 2010: Bamako, Mali (22 participants – from 8 Francophone countries in West Africa)
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Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
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A member of CEAH attended the AU-IBAR meeting and gave a seminar on risk analysis to 42 Chief
Veterinary Officers from the African Union. Entebbe, Uganda. May 6-8, 2010.
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Provided training on basic and advanced epidemiology in Turkey. Funding provided through FAS. A series of
6 training events are planned although the dates have not been finalized at this time.
Provided epidemiology training in Taiwan. Funding through ATIT in Taiwan. Taipei, August 9-13, 2010.
Organized International course on Veterinary Epidemiology. Fort Collins, August 23-September 3, 2010.
Organized the first International risk analysis course. Fort Collins, September 27-October 1
Risk analysis course University of Yucatan, November 18-20, 2010
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5.
Organisation of scientific meetings on behalf of the OIE
Cooperated with the OIE Collaborating Centre on Veterinary Training, Epidemiology, Food Safety and Animal
Welfare in Teramo, Italy to conduct a symposium on recent activities in Epidemiological Modeling. The
Symposium was held in Teramo, In September, 2010.
6.
Coordination of scientific and technical studies in collaboration with other laboratories,
organisations or collaborating centres
Evaluation of Surveillance in Great Britain
NSU is collaborating with the Veterinary Laboratories Agency, Weybridge, UK, to develop a tool for evaluating
surveillance in Great Britain. A proposal was submitted to the Department of Environment, Food, and Rural
Affairs (DEFRA). The project’s overall aim is to develop a reproducible evaluation toolbox that can be applied to
surveillance systems. This will identify the key characteristics of the surveillance system (e.g., sensitivity;
timeliness) that determine performance (e.g., utility; efficiency) and methods for measuring these performance
indicators. The collaborators will also investigate factors that impact key characteristics, including interactions
between farmers and private veterinarians, regional laboratory interactions, and data quality. Understanding
surveillance system performance will also be valuable in defining new requirements, such as national control plans
for salmonella in pigs in Great Britain, due in 2011.
International Aquaculture Surveillance Activities
CEAH collaborates internationally on aquaculture-related activities. Countries with shared waters and/or trade
interests have embarked on several efforts to harmonize standards for aquatic animal disease surveillance and
control.
Most extensively, CEAH participates in working groups, surveillance evaluations, and informal collaborations
with the Canadian Food Inspection Agency and other Canadian scientists to harmonize aquatic disease
surveillance and control bilaterally. Efforts include standards for specific diseases, such as infectious salmon
anemia (ISA) virus or viral hemorrhagic septicemia (VHS) virus, or non-specific standards for surveillance and
control, such as the National Aquatic Animal Health Plan (NAAHP) or mollusc disease. Completed examples of
these collaborations include the Bilateral VHS Surveillance Plan and two supporting scientific publications.
Informal collaborations are currently focused on the co-development of bilateral surveillance strategies for mollusc
or NAAHP diseases. Additionally, the ISA Program works directly with Canadian counterparts to harmonize
disease control in a shared industry and habitat; CEAH periodically functions as a consultant on related
epidemiological issues.
NSU collaborates with Chilean scientists to further ISA control efforts in Chile. ISA is a disease of significant
impact to U.S. salmon producers, but is currently well controlled on this continent. The recent and severe outbreak
of ISA in Chile led to requests for sharing of APHIS expertise in response and surveillance planning. NSU
involvement has included a site visit to the impacted region, presentations on ISA control at an international
conference, and planned participation in an upcoming workshop on ISA control and study design in Chile.
NSU is represented on the Working Group on Environmental Interactions of Marine Aquaculture (WGEIMA).
This group was formed in 2008 at the request of the North Pacific Marine Science Organization (PICES) science
board and fishery council. PICES is an international organization that can influence international marine policy,
Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
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Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
including aquaculture and aquatic animal health. The primary goal of the WGEIMA is to develop standard
methods and tools to assess and compare the environmental interactions and characteristics of marine aquaculture
activities in PICES member-countries, including the U.S. The WGEIMA consists of approximately 12 members
from PICES member nations. Participation in this international forum enables APHIS to have a voice in
developing international standards for future aquatic animal health policy.
Quads Countries Surveillance Working Group
CEAH is a participant on the Quads Countries Surveillance Working Group. The group includes representatives
from the United States, Canada, New Zealand, and Australia and works to demonstrate harmonization by
reviewing international surveillance related to the needs of the OIE. The Quads Surveillance Group is currently
reviewing the OIE World Animal Health Information Systems (WAHIS) and subsequent World Animal Health
Information Database.
A recent review of OIE disease reporting criteria resulted in the Quads surveillance group drafting a letter for
Quad country chief veterinary officers, requesting that the OIE form a new ad hoc group to review criteria for the
listing of terrestrial animal diseases.
Other issues of the Quads Surveillance Working Group include review of the new version of the OIE WAHIS
reporting system, development of joint manuscripts on surveillance topics, and review of national and international
advances in surveillance.
7.
Publication and dissemination of any information within the remit of the mandate given by the
OIE that may be useful to Members of the OIE
CEAH collaborated with international partners on developing an OIE Handbook for Terrestrial Animal Health
Surveillance. The book consists of five chapters. NSU was responsible for writing chapters 2 and 3 and
contributed portions of chapter 5.
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Chapter 2: Roadmap for Designing a Surveillance System: Critical Components of a Plan
Chapter 3: Performance Monitoring: Assessment and Evaluation of a Surveillance System
Chapter 5: Tools and Methods
Beef 2007–08
 Parasite Control Practices on U.S. Cow-calf Operations, 2007–08 (info sheet, 3 p, 12/09)
 Parasites on U.S. Beef Cow-calf Operations, 2007–08 (info sheet, 2 p, 12/09)
 Biosecurity on U.S. Beef Cow-calf Operations (info sheet, 4 p, 12/09)
 Injection Practices on U.S. Beef Cow-calf Operations, 2007–08 (info sheet, 3 p, 12/09)
 Vaccination of Cattle and Calves on U.S. Beef Cow-calf Operations (info sheet, 3 p, 12/09, rev 1/10)
 Vaccination of Calves for Respiratory Disease on U.S. Beef Cow-calf Operations (info sheet, 3 p, 12/09, rev
1/10)
 Beef 2007–08 Part IV: Reference of Beef Cow-calf Management Practices in the United States, 2007–08 (147
p, 2/10)
 Beef 2007-08 Part V: Reference of Beef Cow-calf Management Practices in the United States, 2007-08 (.pdf,
77 p, 4/10)
 Use of Nutritional Supplements for Cows on U.S. Beef Cow-calf Operations (.pdf, 3 p, 5/10)
 Mortality of Calves and Cattle on U.S. Beef Cow-calf Operations (.pdf, 4 p, 5/10)
 Beef 2007-08: Prevalence and Control of Bovine Viral Diarrhea Virus on U.S. Cow-calf Operations, 2007-08
(.pdf. 88 p, 8/10)
Dairy 2007
 Passive Transfer Status of Heifer Calves on U.S. Dairies, 1991–2007 (info sheet,
2 p, 3/10)
 Heifer Calf Health and Management Practices on U.S. Dairy Operations, 2007
(157 p, 2/10)
 Biosecurity Practices on U.S. Dairy Operations, 1991-2007 (.pdf, 145 p, 5/10)
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Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
Sheep 2011
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National Animal Health Monitoring System (NAHMS) to Study Sheep Industry in 2011 (.pdf 2.9mb 8/10)
Small Livestock
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NAHMS Small Livestock Farm Characteristics (.pdf, 10 p, 10/09)
Determining U.S. milk quality using bulk tank somatic cell counts, 2009 (.pdf, 4 p, 7/10)
2009 Animal Health Report (published to website)
Miscellaneous
Manuscripts
Hackett ES, Traub-Dargatz JL, J. E. Knowles Jr JE, S. F. Tarr SF, D. A. Dargatz DA. Arterial blood gas
parameters of normal foals born at 1500 metres elevation. Eq Vet J 2010; 42(1):59–62.
McConnel CS, Garry FB, Hill AE, Lombard JE, Gould DH. Conceptual modeling of postmortem evaluation
findings to describe dairy cow deaths. J Dairy Sci 2010; 93 (1):373–386.
Herrmann-Hoesing LM, Broughton-Neiswanger LE, Gouine KC, White SN, Mousel MR, Lewis GS, Marshall
KL, Knowles DP. Evaluation of a caprine arthritis-encephalitis virus/maedi-visna virus indirect enzyme-linked
immunosorbent assay in the serological diagnosis of ovine progressive pneumonia virus in U.S. sheep. Clin and
Vaccine Immunol 2010; 17 (2):307–310.
Virgin JE, van Slyke TM, Lombard JE, Zadoks RN. Short communication: Methicillin-resistant Staphylococcus
aureus detection in U.S. bulk tank milk. J Dairy Sci 2009; 92(10):4988–4991.
Rao S, Van Donkersgoed J, Bohaychuk V, Besser T, Song X, Wagner B, Hancock D, Renter D, Dargatz D,
Morley PS. Antimicrobial drug use and antimicrobial resistance in enteric bacteria among cattle from Alberta
feedlots. Foodborne Path Dis, 2010; 7(4):449–457.
Ruzante, J. M., Lombard, J.E., Wagner, B.A., Fossler, C.F., Karns, J.S., Gardner, I.A. 2010. Factors associated
with Salmonella presence in environmental samples and bulk-tank milk from U.S. dairies. Zoonoses and Public
HealthEpub ahead of print.
McConnel, C.S., Lombard, J.E., Wagner, B.A., Kopral, C.A., Garry, F.B. 2010. Herd factors associated with
dairy cow mortality in the United States. Submitted to Preventive Veterinary Medicine.
Lombard, J.E., Tucker, C.B., von Keyserlingh, M.A.G., Kopral, C.A., Weary, D.M. 2010. Associations between
cow cleanliness hock scores and stall usage on US dairy farms. J Dairy Sci93:4668-4676.
Sharif S. Aly, Beverly L. Mangold, Robert H. Whitlock, Raymond W. Sweeney, Randall J. Anderson, Jiming
Jiang, Ynte H. Shukken, Ernest Hovingh, David Wolfgang, Jo Ann S. Van Kessel, Jeffrey S. Karns, Jason E.
Lombard, Julia M. Smith, Ian A. Gardner. 2010. Correlation between Herrold’s egg yolk medium culture and
real-time quantitative polymerase chain reaction results for Mycobacterium avium subspecies paratuberculosis in
pooled fecal and environmental samples. J Vet Diagn Invest 22:677-683.
Fayer R, Santin M, Dargatz D. Species of Crytosporidium detected in weaned cattle on cow-calf operation in the
United States. Veterinary Parasitology, 170 (2010) 187-192.
Green A, Dargatz D, Wagner B, Fedorka-Cray P, Ladely S, Kopral C. Analysis of risk factors associated with
Salmonella spp. Isolated from U. S. feedlot cattle. Foodborne Path Dis, 2010, 7 (7): 825-833.
Gustafson, LL. (Wagner, B) VHSV Expert Panel and Working Group. 2010. Viral hemorrhagic septicemia virus
(VHSV IVb) risk factors and association measures derived by expert panel Prev. Vet. Med.94 (1-2): 128-139.
Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
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Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
Gustafson, LL, Klotins. KC, Tomlinson, SM, Karreman, GA, Cameron, AR, Wagner, BA, Remmenga, MD,
Bruneau, NN, Scott, AE.. 2010. Combining surveillance and expert evidence of viral hemorrhagic septicemia
freedom: a decision science approach. Prev. Vet. Med. Med 94(1-2): 140-153.
Hill DE, Haley C., Wagner B., Gamble H.R., Dubey J.P. 2010. Seroprevalence of and risk factors for
Toxoplasma gondii in the U.S. swine herd using sera collected during the National Animal Health Monitoring
Survey (Swine 2006). Zoonoses Public Health 57(1) 53-59.
Van Kessel JS, Karns JS, Lombard JE, Kopral CA. Prevalence of Salmonella enterica, Listeria monocytogenes
and E. coli virulence factors in bulk tank milk and in-line filters from U.S. dairies. Submitted to the Journal of
Food Protection.
Jackson CR, Lombard JE, Dargatz DA, Fedorka-Cray PJ. Prevalence, species distribution, and antimicrobial
resistance of enterococci isolated from US dairy cattle. Submitted to Letters in Applied Microbiology.
Thitaram SN, Frank JF, Lyon SA, Siragusa GR, Bailey JS, Lombard JE, Haley CA, Wagner BA, Dargatz DA,
Fedorka-Cray PJ. Clostridium dificile from healthy food animals: Optimized isolation and prevalence. Accepted
for publication by the Journal of Food Protection.
Tavornpanich, S., Wells, S.J., Fossler, C.P., Roussel, A.J., Gardner, I.A. Improved method of herd classification
for the U.S.Voluntary Bovine Johne’s Disease Control Program. Accepted for publication Am J Vet Res.
Dargatz, D. A. What is normal? A field approach to characterizing health and management of the nation's animal
populations. Preventive Veterinary Medicine 88(2):94-100, 2009.
Hill AE, Green AL, Wagner BA, and Dargatz DA. Relationship between herd size and annual prevalence of and
primary antimicrobial treatments for common diseases on dairy operations in the United States. Preventive
Veterinary Medicine 88(4):264–277, 2009.
Traub-Dargatz JL, Dargatz DA. Antibacterial Drug Resistance and Equine Practice. Equine Veterinary Education
21 (1): 49-56, 2009.
Van Donkersgoed J, Bohaychuk V, Besser T, Song X, Wagner B, Hancock D, Renter D, Dargatz, D. Occurrence
of foodborne bacteria in Alberta feedlots. Canadian Veterinary Journal 50 (2):166-172, 2009.
E.S. Hacket J.L. Traub-Dargatz, J.E. Knowles Jr., S.F. Tarr and David Dargatz. Arterial blood gas parameters
of normal foals born at 1500 meters elevation. Equine Veterinary Journal, 42 (1):59-62, 2010.
Macedo-Vinas M, Vola M, Martinez A, Gill A, Hyatt DR, Dargatz, DA, Algorta G. Antimicrobial resistance
among Salmonella enterica isolates from animals, foods and feeds in Uruguay, 1996 – 2004. In preparation.
Dargatz, D.A, Kopral, C.A, Wagner, B.A, Pritchard, R.W. Mortality ratios among feedlot cattle in the United
States from 1994-2006. In preparation.
McGowan, Catherine M, Traub-Dargatz J, “Update on aged horse health, management and welfare,” in
proceedings - ACVIM forum/Canadian VMA convention, Montreal, QC, 2009.
Bush E and Haley C. NAHMS Swine 2007: a national study of small-enterprise swine operations. In proceedings
from the American Association of Swine Veterinarians Conference 2009, p 359–360.
David Dargatz. Cattle health management practices in U.S. herds in proceedings from the Producer Education
committee meeting at the NCBA annual meeting in San Antonio, TX. January 29, 2010.
David Dargatz. Update on the National Veterinary Accreditation Program, VS2015, and some CEAH activities to
the CPHRVM. In proceedings from the AVMA Food Safety Advisory Committee and Council on Public Health
and Regulatory Veterinary Medicine meeting in Schaumburg, IL. February 1, 2010.
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Animal Disease Surveillance Systems, Risk Analysis and Epidemiological Modelling
Haley C, Olea-Popelka F, Wagner B and Dargatz D. Analysis of antimicrobial susceptibility profiles of
Salmonella Serotypes using survival analysis, in proceedings, from the 21st International Pig Veterinary, Society
Congress 2010; 116.
Haley C, Wagner B, and Murtaugh MP. Estimating the sensitivity and specificity of a new ELISA test for porcine
circovirus 2 exposure using a study pseudo gold standard and latent-class analysis, in proceedings from the
American Association of Swine Veterinarians Conference 2009, p 255–261.
Lombard JE, Knott R., and Garry FB. Comparison of testing and management strategies on the contamination of
the calving area with Mycobacterium avium subspecies paratuberculosis, in proceedings from the 90th Conference
of Researchers in Animal Disease Annual Meeting, Chicago, IL, 2009.
Olea-Popelka F, Haley C, Wagner B, Dargatz D, and Cray P. Analysis of antimicrobial susceptibility profiles of
Salmonella serotypes using survival analysis, in proceedings, from the American Association of Swine
Veterinarians Conference 2009, p 405–406.
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Annual reports of OIE Reference Laboratories and Collaborating Centres, 2010
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