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Initial assessment of the economic burden of major parasitic helminth infections to the ruminant livestock industry in Europe

Johannes Charlier 1, * Laura Rinaldi 2 Vincenzo Musella 3 Harm W. Ploeger 4 Christophe Chartier 5 Hannah Rose Vineer 6 Barbara Hinney 7 Georg von Samson-Himmelstjerna 8 Bogdan Băcescu 9 Marcin Mickiewicz 10 Teresa Letra Mateus 11, 12 Maria Martinez-Valladares 13 Sinead Quealy 14 Hassan Azaizeh 15 Blagica Sekovska 16 Hafidh Akkari 17 Saulius Petkevicius 18 Lisbeth Hektoen 19 Johan Höglund 20 Eric R. Morgan 21 Dave J. Bartley 22 Edwin Claerebout 23
Abstract : We report a European wide assessment of the economic burden of gastrointestinal nematodes, Fasciola hepatica (common liver fluke) and Dictyocaulus viviparus (bovine lungworm) infections to the ruminant livestock industry. The economic impact of these parasitic helminth infections was estimated by a deterministic spreadsheet model as a function of the proportion of the ruminant population exposed to grazing, the infection frequency and intensity, the effect of the infection on animal productivity and mortality and anthelmintic treatment costs. In addition, we estimated the costs of anthelmintic resistant nematode infections and collected information on public research budgets addressing helminth infections in ruminant livestock. The epidemiologic and economic input data were collected from international databases and via expert opinion of the Working Group members of the European Co-operation in Science and Technology (COST) action COMbatting Anthelmintic Resistance in ruminants (COMBAR). In order to reflect the effects of uncertainty in the input data, low and high cost estimates were obtained by varying uncertain input data arbitrarily in both directions by 20 %. The combined annual cost [low estimate-high estimate] of the three helminth infections in 18 participating countries was estimated at € 1.8 billion [€ 1.0–2.7 billion]. Eighty-one percent of this cost was due to lost production and 19 % was attributed to treatment costs. The cost of gastrointestinal nematode infections with resistance against macrocyclic lactones was estimated to be € 38 million [€ 11–87 million] annually. The annual estimated costs of helminth infections per sector were € 941 million [€ 488 – 1442 million] in dairy cattle, € 423 million [€ 205–663 million] in beef cattle, € 151million [€ 90–213 million] in dairy sheep, € 206 million [€ 132–248 million] in meat sheep and € 86 million [€ 67–107 million] in dairy goats. Important data gaps were present in all phases of the calculations which lead to large uncertainties around the estimates. Accessibility of more granular animal population datasets at EU level, deeper knowledge of the effects of infection on production, levels of infection and livestock grazing exposure across Europe would make the largest contribution to improved burden assessments. The known current public investment in research on helminth control was 0.15 % of the estimated annual costs for the considered parasitic diseases. Our data suggest that the costs of enzootic helminth infections which usually occur at high prevalence annually in ruminants, are similar or higher than reported costs of epizootic diseases. Our data can support decision making in research and policy to mitigate the negative impacts of helminth infections and anthelmintic resistance in Europe, and provide a baseline against which to measure future changes.
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Submitted on : Friday, August 21, 2020 - 11:49:42 AM
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Johannes Charlier, Laura Rinaldi, Vincenzo Musella, Harm W. Ploeger, Christophe Chartier, et al.. Initial assessment of the economic burden of major parasitic helminth infections to the ruminant livestock industry in Europe. Preventive Veterinary Medicine, Elsevier, 2020, 182, pp.105103. ⟨10.1016/j.prevetmed.2020.105103⟩. ⟨hal-02918923⟩



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