Increased sensitivity for the diagnosis of Taenia saginata cysticercus infection by additional heart examination compared to the EU-approved routine meat inspection |
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| Authors: | Ramon Marc Eichenberger Roger Stephan Peter Deplazes |
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| Affiliation: | 1. Institute of Parasitology, University of Zürich, Winterthurerstrasse 266a, CH-8057 Zürich, Switzerland;2. Institute for Food Safety and Hygiene, University of Zürich, Winterthurerstrasse 272, CH-8057 Zürich, Switzerland;1. School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran;2. Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran;3. Social Security Organization, Semnan, Iran;4. Department of Laboratory Sciences, School of Paramedical Sciences, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran;5. Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran;6. Department of Microbiology, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran;7. Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;8. Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran;1. University of Ngaoundéré, School of Sciences and Veterinary Medicine, P.O. Box 454, Ngaoundéré, Cameroon;2. Veterinary Clinical Centre, the University of Melbourne, 250 Princes Hwy, Werribee, Victoria 3030, Australia;3. University Institute of the Diocese of Buea, School of Agriculture and Natural Resources, P.O. Box 563, Buea, Cameroon;4. Institute of Tropical Medicine, Nationalestraat 155, B-2000 Antwerpen, Belgium;1. Department of Parasitology, Asahikawa Medical University, Asahikawa, Japan;2. Medical Research Centre, Institute of Medical Research and Medicinal Plants Studies (IMPM), Ministry of Scientific Research and Innovation, Yaoundé, Cameroon;3. Université des Montagnes, Bangangté, Cameroon;4. Department of Parasitology and Infectious Diseases, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon;1. Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark;2. Risk analysis group, Department for Food Safety & Veterinary Issues, Danish Agriculture & Food Council, Axeltorv 3, Copenhagen, Denmark;2. Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos (FZEA), Departamento de Medicina Veterinária, Avenida Duque de Caxias Norte 225, CEP 13635-900 Pirassununga, São Paulo, Brazil;3. Fiscal Federal do Ministério da Agricultura, Pecuária e Abastecimento, Brazil;1. School of Veterinary Science, University of Queensland, Gatton, QLD 4343, Australia;2. Queensland Alliance for Agriculture & Food Innovation, University of Queensland, St. Lucia, QLD 4072, Australia |
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| Abstract: | In spite of the statutory meat inspection at abattoirs, Taenia saginata cysticercus infection in cattle remains an economically important parasitic disease for the livestock industry by affecting food safety. The routinely performed standard meat inspection protocol has a low diagnostic sensitivity for the detection of T. saginata cysticerci infections. Therefore, an abattoir trial aiming to increase the detection level was undertaken. In three EU-approved abattoirs, several additional heart incisions were performed in a total of 1088 slaughtered cattle originating from 832 farms throughout Switzerland. Cysticerci as putative parasitic lesions were classified by visual examination during meat inspection and confirmed microscopically and/or by molecular analyses. With the EU-approved routine meat inspection, bovine cysticercosis was diagnosed in 1.8% (20/1088) of the slaughtered animals. Additional incisions into the heart muscle revealed a further 29 cases, indicating that the prevalence was at least 4.5%. All infected animals originated from individual farms. This straightforward technique had a significantly higher sensitivity and is feasible for routine practice. It also confirms that the prevalence of this zoonotic parasite in the cattle population is underestimated based on the routine abattoir reports. |
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