Neuropathological survey of fallen stock: Active surveillance reveals high prevalence of encephalitic listeriosis in small ruminants

This paper describes the prevalence of brain lesions in the Swiss fallen stock population of small ruminants. 3075 whole brains (75% sheep, 25% goats) were collected as part of a year-long active survey of transmissible spongiform encephalopathies (TSEs) in small ruminants conducted by the Swiss aut...

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Veröffentlicht in:Veterinary microbiology 2008-08, Vol.130 (3), p.320-329
Hauptverfasser: Oevermann, Anna, Botteron, Catherine, Seuberlich, Torsten, Nicolier, Alexandra, Friess, Martina, Doherr, Marcus G., Heim, Dagmar, Hilbe, Monika, Zimmer, Katja, Zurbriggen, Andreas, Vandevelde, Marc
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container_end_page 329
container_issue 3
container_start_page 320
container_title Veterinary microbiology
container_volume 130
creator Oevermann, Anna
Botteron, Catherine
Seuberlich, Torsten
Nicolier, Alexandra
Friess, Martina
Doherr, Marcus G.
Heim, Dagmar
Hilbe, Monika
Zimmer, Katja
Zurbriggen, Andreas
Vandevelde, Marc
description This paper describes the prevalence of brain lesions in the Swiss fallen stock population of small ruminants. 3075 whole brains (75% sheep, 25% goats) were collected as part of a year-long active survey of transmissible spongiform encephalopathies (TSEs) in small ruminants conducted by the Swiss authorities between July 2004 and July 2005. All fallen stock brains were systematically examined by histopathology to obtain reliable data on histologically identifiable brain lesions. Lesions were found in an unexpectedly high number of animals (8.1% of all examined brains). A wide spectrum of diseases was detected showing that this approach provides an excellent opportunity to screen for the prevalence of neurological diseases. Encephalitic listeriosis was by far the most frequent cause of CNS lesions in both species and its prevalence was unexpectedly high when compared to notified confirmed cases. In conclusion, the prevalence of listeriosis as estimated by passive surveillance based on the notification of clinical suspects has been underestimated in the past.
doi_str_mv 10.1016/j.vetmic.2008.01.015
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All fallen stock brains were systematically examined by histopathology to obtain reliable data on histologically identifiable brain lesions. Lesions were found in an unexpectedly high number of animals (8.1% of all examined brains). A wide spectrum of diseases was detected showing that this approach provides an excellent opportunity to screen for the prevalence of neurological diseases. Encephalitic listeriosis was by far the most frequent cause of CNS lesions in both species and its prevalence was unexpectedly high when compared to notified confirmed cases. In conclusion, the prevalence of listeriosis as estimated by passive surveillance based on the notification of clinical suspects has been underestimated in the past.</description><subject>Age Distribution</subject><subject>animal pathology</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Brain</subject><subject>Brain - pathology</subject><subject>Cluster Analysis</subject><subject>disease prevalence</subject><subject>disease surveillance</subject><subject>encephalitis</subject><subject>Encephalitis - microbiology</subject><subject>Encephalitis - pathology</subject><subject>Encephalitis - veterinary</subject><subject>epidemiological studies</subject><subject>etiology</subject><subject>Fallen stock survey</subject><subject>Fundamental and applied biological sciences. 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All fallen stock brains were systematically examined by histopathology to obtain reliable data on histologically identifiable brain lesions. Lesions were found in an unexpectedly high number of animals (8.1% of all examined brains). A wide spectrum of diseases was detected showing that this approach provides an excellent opportunity to screen for the prevalence of neurological diseases. Encephalitic listeriosis was by far the most frequent cause of CNS lesions in both species and its prevalence was unexpectedly high when compared to notified confirmed cases. In conclusion, the prevalence of listeriosis as estimated by passive surveillance based on the notification of clinical suspects has been underestimated in the past.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><pmid>18355992</pmid><doi>10.1016/j.vetmic.2008.01.015</doi><tpages>10</tpages></addata></record>
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subjects Age Distribution
animal pathology
Animals
Biological and medical sciences
Brain
Brain - pathology
Cluster Analysis
disease prevalence
disease surveillance
encephalitis
Encephalitis - microbiology
Encephalitis - pathology
Encephalitis - veterinary
epidemiological studies
etiology
Fallen stock survey
Fundamental and applied biological sciences. Psychology
goat diseases
Goat Diseases - epidemiology
Goat Diseases - microbiology
Goat Diseases - pathology
Goats
histopathology
immunohistochemistry
Infectious CNS diseases
lesions (animal)
Listeria monocytogenes
Listeriosis
Listeriosis - epidemiology
Listeriosis - microbiology
Listeriosis - pathology
Listeriosis - veterinary
Microbiology
Neuropathological lesions
polymerase chain reaction
Population Surveillance
Prevalence
risk assessment
Ruminantia
screening
Sheep
sheep diseases
Sheep Diseases - epidemiology
Sheep Diseases - microbiology
Sheep Diseases - pathology
Small ruminants
Switzerland - epidemiology
Time Factors
title Neuropathological survey of fallen stock: Active surveillance reveals high prevalence of encephalitic listeriosis in small ruminants
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