Evaluation of farm-level parameters derived from animal movements for use in risk-based surveillance programmes of cattle in Switzerland

BMC Veterinary Research

Martin Reist³  Jakob Zinsstag¹  Beatriz Vidondo⁴  Ann Lindberg²  Heinzpeter Schwermer³  Stefan Widgren²  Sara Schärrer⁴ 

[1] Swiss Tropical and Public Health Institute (Swiss TPH), University of Basel, Basel, Switzerland;National Veterinary Institute (SVA), Uppsala, Sweden;Federal Food Safety and Veterinary Office (FSVO), Bern, Switzerland;Veterinary Public Health Institute (VPHI), Vetsuisse Faculty, University of Bern, Bern, Switzerland

关键词: Risk-based surveillance;    Animal movement database;    Bovine viral diarrhoea;    Risk score;    Cattle movements;   

Others  :  1219089
DOI  :  10.1186/s12917-015-0468-8

 received in 2014-10-27, accepted in 2015-07-06,  发布年份 2015

【 摘 要 】

Background

This study focused on the descriptive analysis of cattle movements and farm-level parameters derived from cattle movements, which are considered to be generically suitable for risk-based surveillance systems in Switzerland for diseases where animal movements constitute an important risk pathway.

Methods

A framework was developed to select farms for surveillance based on a risk score summarizing 5 parameters. The proposed framework was validated using data from the bovine viral diarrhoea (BVD) surveillance programme in 2013.

Results

A cumulative score was calculated per farm, including the following parameters; the maximum monthly ingoing contact chain (in 2012), the average number of animals per incoming movement, use of mixed alpine pastures and the number of weeks in 2012 a farm had movements registered. The final score for the farm depended on the distribution of the parameters. Different cut offs; 50, 90, 95 and 99 %, were explored. The final scores ranged between 0 and 5. Validation of the scores against results from the BVD surveillance programme 2013 gave promising results for setting the cut off for each of the five selected farm level criteria at the 50th percentile. Restricting testing to farms with a score ≥ 2 would have resulted in the same number of detected BVD positive farms as testing all farms, i.e., the outcome of the 2013 surveillance programme could have been reached with a smaller survey.

Conclusions

The seasonality and time dependency of the activity of single farms in the networks requires a careful assessment of the actual time period included to determine farm level criteria. However, selecting farms in the sample for risk-based surveillance can be optimized with the proposed scoring system. The system was validated using data from the BVD eradication program. The proposed method is a promising framework for the selection of farms according to the risk of infection based on animal movements.

【 授权许可】

   
2015 Schärrer et al.

【 图 表 】

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【 参考文献 】

• [1]Wentholt M, Cardoen S, Imberechts H, Van Huffel X, Ooms B, Frewer L. Defining European preparedness and research needs regarding emerging infectious animal disease: results from a Delphi expert consulation. Prev Vet Med. 2012; 103:81-92.
• [2]Firestone S, Ward M, Christley R, Dhand N. The importance of location in contact networks: Describing early epidemic spread using spatial social network analysis. Prev Vet Med. 2011; 102:185-95.
• [3]Green DM, Kiss IZ, Mitchell AP, Kao RR. Estimates for local and movement-based transmission of bovine tuberculosis in British cattle. Proc Biol Sci. 2008; 275:1001-5.
• [4]Cowiea C, Marreosb N, Gortázarb C, Jarosob R, Whitea P, Balseiroc A. Shared risk factors for multiple livestock diseases: A case study of bovine tuberculosis and brucellosis. Res Vet Sci. 2014; 97:491-7.
• [5]Junling M, van den Driessche P, Willeboordse F. The importance of contact network topology for the success of vaccination strategies. J Theor Biol. 2013; 325:12-21.
• [6]Ortiz-Pealez A, Guitian F, Pfeiffer D, Soares-Magalhães R, Guitian FJ. Use of social network analysis to characterize the pattern of animal movements in the initial phases of the 2001 foot and mouth disease (FMD) epidemic in the UK. Prev Vet Med. 2006; 76:40-55.
• [7]Frössling J, Ohlson A, Björkman C, Håkansson N, Nöremark M. Application of network analysis parameters in risk-based surveillance - examples based on cattle trade data and bovine infections in Sweden. Prev Vet Med. 2012; 105:202-8.
• [8]Martinez-López B, Perez A, Sánchez-Vizcaíno J. Social network analysis. Review of genera concepts and use in preventive veterinary medicine. Transbound Emerg Dis. 2009; 56:109-20.
• [9]Dubé C, Ribble C, Kelton D, Mcnab B. A review of network analysis terminology and its application to foot-and-mouth disease modelling and policy development. Transbound Emerg Dis. 2009; 56:73-85.
• [10]Dubé C, Ribble C, Kelton D, Mcnab B. Introduction to network analysis and its implications for animal disease modelling. Rev Sci Tech. 2011; 30:425-36.
• [11]Luke A, Harris J. Network analysis in public health: History, Methods and applications. Annu Rev Public Health. 2008; 28:69-93.
• [12]Natale F, Giovannini A, Savini L, Palma D, Possenti L, Fiore G et al.. Network analysis of Italian cattle trade patterns and evaluation of risks for potential disease spread. Prev Vet Med. 2009; 92:341-50.
• [13]Grisi-Filho J, Amaku M, Ferreira F, Dias R, Neto J, Negreiros R et al.. Detecting livestock production zones. Prev Vet Med. 2013; 110:304-3011.
• [14]Nöremark M, Håkansson N, Sternberg S, Lindberg A, Jonsson A. Network analysis of cattle and pig movements in Sweden : Measures relevant for disease control and risk based surveillance. Prev Vet Med. 2011; 99:78-90.
• [15]Holme P, Saramäki J. Temporal networks. Phys Rep. 2012; 519:97-125.
• [16]Flocchini P, Mans B, Santoro N. On the exploration of time-varying networks. Theor Comput Sci. 2013; 469:53-68.
• [17]Blonder B, Wey TW, Dornhaus A, James R, Sih A. Temporal dynamics and network analysis. Methods Ecol Evol. 2012; 3:958-72.
• [18]Riolo CS, Koopman JS, Chick SE. Methods and measures for the description of epidemiologic contact networks. J Urban Health Bull New York Acad Med. 2001; 78:446-57.
• [19]Reist M, Jemmi T, Stärk K. Policy-driven development of cost-effective, risk-based surveillance strategies. Prev Vet Med. 2012; 105:176-84.
• [20]Hadorn D, Rüfenacht J, Hauser R, Stärk K. Risk-based design of repeated surveys for the documentation of freedom from non-highly contagious diseases. Prev Vet Med. 2002; 56:179-92.
• [21]Schwermer H, Reding I, Hadorn D. Risk-based sample size calculation for consecutive surveys to document freedom from animal diseases. Prev Vet Med. 2009; 92:366-72.
• [22]Stärk K, Regula G, Hernandez J, Knopf L, Fuchs K, Morris R et al.. Concepts for risk-based surveillance in the field of veterinary medicine and veterinary public health: Review of current approaches. BMC Health Serv Res. 2006; 6:20. BioMed Central Full Text
• [23]Blickenstorfer S, Schwermer H, Engels M, Reist M, Doherr MG, Hadorn DC. Using scenario tree modelling for targeted herd sampling to substantiate freedom from disease. BMC Vet Res. 2011; 7:49. BioMed Central Full Text
• [24]Gates M, Humphry RW, Gunn GJ, Woolhouse MEJ. Not all cows are epidemiologically equal: quantifying the risks of bovine viral diarrhoea virus (BVDV) transmission through cattle movements. Vet Res. 2014; 45:110. BioMed Central Full Text
• [25]Brock KV. The persistence of bovine viral diarrhea virus. Biologicals. 2003.133-5.
• [26]Schwermer H, Bernet D, Presi P, Schaller P, Stern M, Heim D. Data management systems for the bovine viral diarrhoea eradication programme in Switzerland. Rev Sci Tech. 2013; 32:741-5.
• [27]Reber A, Reist M, Schwermer H. Cost-effectiveness of bulk-tank milk testing for surveys to demonstrate freedom from infectious bovine rhino- tracheitis and bovine enzootic leucosis in Switzerland. Schweiz Arch Tierheilkd. 2012; 154:189-97.
• [28]Ståhl K, Kampa J, Baule C, Isaksson M, Moreno-López J, Belák S et al.. Molecular epidemiology of bovine viral diarrhoea during the final phase of the Swedish BVD-eradication programme. Prev Vet Med. 2005; 72:103-8.
• [29]Lindberg A, Groenendaal H, Alenius S, Emanuelson U. Validation of a test for dams carrying foetuses persistently infected with bovine viral-diarrhoea virus based on determination of antibody levels in late pregnancy. Prev Vet Med. 2001; 51:199-214.
• [30]Tinsley M, Lewis FI, Brülisauer F. Network modeling of BVD transmission. Vet Res. 2012; 43:11. BioMed Central Full Text
• [31]Voelk V, Graber HU, van den Borne BHP, Sartori C, Steiner A, Bodmer M et al.. A longitudinal study investigating the prevalence of Staphylococcus aureus genotype B in seasonally communal dairy herds. J Dairy Sci. 2014; 97:4184-92.
• [32]agate. https://www. agate.ch/portal/web/agate/home webcite
• [33]Wasserman S, Faust K. Social Network Analysis: Methods and Applications (Structural Analysis in the Social Sciences). Cambridge University Press, New York; 1994.
• [34]Webb CR. Investigating the potential spread of infectious diseases of sheep via agricultural shows in Great Britain. Epidemiol Infect. 2006; 134:31-40.
• [35]Dutta BL, Ezanno P, Vergu E. Characteristics of the spatio-temporal network of cattle movements in France over a 5-year period. Prev Vet Med. 2014; 117:79-94.
• [36]Joanes DN, Gill CA. Comparing measures of sample skewness and kurtosis. J R Stat Soc Ser D (The Stat). 1998; 47:183-9.
• [37]Cameron A. The consequences of risk-based surveillance: Developing output-based standards for surveillance to demonstrate freedom from disease. Prev Vet Med. 2012; 105:280-6.
• [38]Freeman LC. Centrality in social networks conceptual clarification. Soc Networks. 1978; 1:215-39.
• [39]Dohoo I, Wayne M, Stryhn H. Veterinary epidemiologic researzch. 2nd ed. Charlottetown, PE Canada: VER Inc; 2010.
• [40]Nöremark M, Widgren S. EpiContactTrace: an R-package for contact tracing during livestock disease outbreaks and for risk-based surveillance. BMC Vet Res. 2014; 10:71. BioMed Central Full Text
• [41]R: A language and environment for statistical computing. 2008.
• [42]Csardi G, Nepusz T. The igraph software package for complex network research. 2006.
• [43]Meyer D, Dimitriadou E, Hornik K, Weingessel A, Leisch F. e1071: Misc functions of the department of statistics (e1071). R package version 1.6-4. 2014.
• [44]Kim H, Anderson R. Temporal node centrality in complex networks. Phys Rev E Stat Nonlin Soft Matter Phys. 2012; 85(November 2011):1-8.
• [45]Frössling J, Nusinovici S, Nöremark M, Widgren S, Lindberg A. A novel method to identify herds with an increased probability of disease introduction due to animal trade. Prev Vet Med. 2014; 117:367-74.
• [46]Ribeiro-Lima J, Enns EA, Thompson B, Craft ME, Wells SJ. From network analysis to risk analysis—An approach to risk-based surveillance for bovine tuberculosis in Minnesota, US. Prev Vet Med. 2015; 118:328-40.
• [47]Ensoy C, Aerts M, Welby S, Van Der Stede Y, Faes C. A dynamic spatio-temporal model to investigate the effect of cattle movements on the spread of bluetongue BTV-8 in Belgium. PLoS One. 2013; 8:e78591.
• [48]De Koeijer AA, Boender G, Nodelijk G, Staubach C, Meroc E, Elbers ARW. Quantitative analysis of transmission parameters for bluetongue virus serotype 8 in Western Europe in 2006. Vet Res. 2011; 42:53. BioMed Central Full Text
• [49]Presi P, Struchen R, Knight-Jones T, Scholl S, Heim D. Bovine viral diarrhea (BVD) eradication in Switzerland-Experiences of the first two years. Prev Vet Med. 2011; 99:112-21.
• [50]Siegwart N, Hilbe M, Hässig M, Braun U. Increased risk of BVDV infection of calves from pregnant dams on communal Alpine pastures in Switzerland. Vet J. 2006; 172:386-8.
• [51]Bodmer M, Kaufmann T, Zanoni R, Steiner A. A BVD free communal alpine pasture in Switzerland. Cattle Pract. 2007.294.
• [52]Rossmanith W, Janacek R, Wilhelm E. Control of BVDV-infection on common grassland - The key for successful BVDV-eradication in Lower Austria. Prev Vet Med. 2005; 72:133-7.
• [53]Braun U, Schönmann M, Ehrensperger F, Hilbe M, Strasser M. Intrauterine infection with bovine virus diarrhoea virus on alpine communal pastures in Switzerland. Zentralbl Veterinarmed A. 1999; 46:13-7.
• [54]Braun U, Schönmann M, Ehrensperger F, Hilbe M, Brunner D, Stärk KD et al.. Epidemiology of bovine virus diarrhoea in cattle on communal alpine pastures in Switzerland. Zentralbl Veterinarmed A. 1998; 45:445-52.