Surveillance of bovine tuberculosis and risk estimation of a future reservoir formation in wildlife in Switzerland and Liechtenstein.

Schöning, Janne Marie; Cerny, Nadine; Prohaska, Sarah; Wittenbrink, Max M; Smith, Noel H; Bloemberg, Guido; Pewsner, Mirjam Lea; Schiller, Irene; Origgi, Francesco C; Ryser-Degiorgis, Marie-Pierre (2013). Surveillance of bovine tuberculosis and risk estimation of a future reservoir formation in wildlife in Switzerland and Liechtenstein. PLoS ONE, 8(1), e54253. Public Library of Science 10.1371/journal.pone.0054253

[img]
Preview
Text
journal.pone.0054253.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (650kB) | Preview

Bovine tuberculosis (bTB) caused by Mycobacterium bovis or M. caprae has recently (re-) emerged in livestock and wildlife in all countries bordering Switzerland (CH) and the Principality of Liechtenstein (FL). Comprehensive data for Swiss and Liechtenstein wildlife are not available so far, although two native species, wild boar (Sus scrofa) and red deer (Cervus elaphus elaphus), act as bTB reservoirs elsewhere in continental Europe. Our aims were (1) to assess the occurrence of bTB in these wild ungulates in CH/FL and to reinforce scanning surveillance in all wild mammals; (2) to evaluate the risk of a future bTB reservoir formation in wild boar and red deer in CH/FL. Tissue samples collected from 2009 to 2011 from 434 hunted red deer and wild boar and from eight diseased ungulates with tuberculosis-like lesions were tested by direct real-time PCR and culture to detect mycobacteria of the Mycobacterium tuberculosis complex (MTBC). Identification of suspicious colonies was attempted by real-time PCR, genotyping and spoligotyping. Information on risk factors for bTB maintenance within wildlife populations was retrieved from the literature and the situation regarding identified factors was assessed for our study areas. Mycobacteria of the MTBC were detected in six out of 165 wild boar (3.6%; 95% CI: 1.4-7.8) but none of the 269 red deer (0%; 0-1.4). M. microti was identified in two MTBC-positive wild boar, while species identification remained unsuccessful in four cases. Main risk factors for bTB maintenance worldwide, including different causes of aggregation often resulting from intensive wildlife management, are largely absent in CH and FL. In conclusion, M. bovis and M. caprae were not detected but we report for the first time MTBC mycobacteria in Swiss wild boar. Present conditions seem unfavorable for a reservoir emergence, nevertheless increasing population numbers of wild ungulates and offal consumption may represent a risk.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > Veterinary Public Health / Herd Health Management
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Center for Fish and Wildlife Health (FIWI)

UniBE Contributor:

Schöning, Janne Marie; Pewsner, Mirjam Lea; Origgi, Francesco and Ryser, Marie Pierre

Subjects:

600 Technology > 630 Agriculture

ISSN:

1932-6203

Publisher:

Public Library of Science

Language:

English

Submitter:

Susanne Portner

Date Deposited:

24 Jul 2014 16:11

Last Modified:

12 Feb 2015 11:28

Publisher DOI:

10.1371/journal.pone.0054253

PubMed ID:

23349839

BORIS DOI:

10.7892/boris.44323

URI:

https://boris.unibe.ch/id/eprint/44323

Actions (login required)

Edit item Edit item
Provide Feedback