Towards harmonised procedures in wildlife epidemiological investigations: A serosurvey of infection with Mycobacterium bovis and closely related agents in wild boar (Sus scrofa) in Switzerland |
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| Institution: | 1. Centre for Fish and Wildlife Health (FIWI), Vetsuisse Faculty, University of Bern, Postfach 8466, Bern CH-3006, Switzerland;2. SaBio IREC (CSIC-UCLM-JCCM), Ronda de Toledo s/n, Ciudad Real 13071, Spain;3. Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 270, Zurich 8057, Switzerland;1. Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Via San Costanzo 4, 06126 Perugia (PG), Italy;2. Istituto Zooprofilattico Sperimentale dell''Umbria e delle Marche, “Togo Rosati”, Via Salvemini 1, 06126 Perugia (PG), Italy;3. Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Borgo XX Giugno 74, 06121 Perugia (PG), Italy;1. Servicio Microbiología Clínica y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain;2. Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain;3. Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain;4. CEI Campus Moncloa, UCM-UPM, Madrid, Spain;5. CIBER Enfermedades Respiratorias, CIBERES, Spain;6. Departamento de Medicina, Facultad de Medicina, Universidad Complutense, Madrid, Spain;7. Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain;1. Department of Parasitology, Faculty of Pharmacy, University of Granada;2. Departamento de Parasitología, Facultad de Farmacia, Campus Universitario de Cartuja, 18.071, Granada, Spain |
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| Abstract: | Bovine tuberculosis (bTB) is a (re-)emerging disease in European countries, including Switzerland. This study assesses the seroprevalence of infection with Mycobacterium bovis and closely related agents in wild boar (Sus scrofa) in Switzerland, because wild boar are potential maintenance hosts of these pathogens. The study employs harmonised laboratory methods to facilitate comparison with the situation in other countries. Eighteen out of 743 blood samples tested seropositive (2.4%, CI: 1.5–3.9%) by ELISA, and the results for 61 animals previously assessed using culture and PCR indicated that this serological test was not 100% specific for M. bovis, cross-reacting with M. microti. Nevertheless, serology appears to be an appropriate test methodology in the harmonisation of wild boar testing throughout Europe. In accordance with previous findings, the low seroprevalence found in wild boar suggests wildlife is an unlikely source of the M. bovis infections recently detected in cattle in Switzerland. This finding contrasts with the epidemiological situation pertaining in southern Spain. |
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