Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds

Background: Fasciola hepatica, a trematode parasite (liver fluke), infects a wide range of host species causing fasciolosis. The disease is prevalent world-wide and causes considerable economic losses to the livestock industry. Fasciolosis is regarded as an emerging food-borne zoonosis. To promote awareness among farmers and to implement strategies to control the infection, this study examined the prevalence, spatial distribution and risk factors for F. hepatica infection in Danish cattle herds. Methods: A retrospective population based study was performed using meat inspection data of approximately 1.5 million cattle slaughtered in the period 2011 to 2013. Annual cumulative prevalence of recorded liver fluke findings was calculated for each year. Global and local spatial cluster analysis was used to identify and map spatial patterns of F. hepatica positive and negative herds to explore environmental indicators of infection. Herd level, trade and environmental risk factors were evaluated for association with infection using logistic regression. Herd infection status as predicted from the final risk factor model was compared with the observed status using heat maps to assess how well the model fitted the observed spatial pattern. Results: During the investigated period (2011–2013), an increase in annual herd prevalence was noted (2011–25.6%; 2012–28.4%; 2013–29.3%). The spatial analysis suggested significant clustering of positive and negative herds. Presence of streams, wetlands and pastures on farms showed a significant association with the presence of infection in cattle herds. Buying animals from positive herds was a risk factor on conventional farms. Additionally, risk of being infected with F. hepatica was higher in non-dairy herds of medium size (=30 and <100) when compared to dairy and large (=100) cattle herds. The observed spatial pattern could be reproduced by predictions of the risk factor model. Conclusions: This study showed an increase in annual herd level prevalence (2011 to 2013) indicating that an increasing proportion of herds are infected with F. hepatica infection every year in Denmark. Fasciolosis was found to be associated with both herd and environmental factors where the infection was influenced by local factors that clustered geographically.

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Main Authors: Olsen, A., Frankena, K., Bodker, R., Toft, N., Thamsborg, S.M., Enemark, H.L., Halasa, T.
Format: Article/Letter to editor biblioteca
Language:English
Subjects:Cattle, Denmark, Fasciola hepatica, Prevalence, Risk factors, Spatial model,
Online Access:https://research.wur.nl/en/publications/prevalence-risk-factors-and-spatial-analysis-of-liver-fluke-infec
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spelling dig-wur-nl-wurpubs-4863482024-12-04 Olsen, A. Frankena, K. Bodker, R. Toft, N. Thamsborg, S.M. Enemark, H.L. Halasa, T. Article/Letter to editor Parasites & Vectors 8 (2015) ISSN: 1756-3305 Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds 2015 Background: Fasciola hepatica, a trematode parasite (liver fluke), infects a wide range of host species causing fasciolosis. The disease is prevalent world-wide and causes considerable economic losses to the livestock industry. Fasciolosis is regarded as an emerging food-borne zoonosis. To promote awareness among farmers and to implement strategies to control the infection, this study examined the prevalence, spatial distribution and risk factors for F. hepatica infection in Danish cattle herds. Methods: A retrospective population based study was performed using meat inspection data of approximately 1.5 million cattle slaughtered in the period 2011 to 2013. Annual cumulative prevalence of recorded liver fluke findings was calculated for each year. Global and local spatial cluster analysis was used to identify and map spatial patterns of F. hepatica positive and negative herds to explore environmental indicators of infection. Herd level, trade and environmental risk factors were evaluated for association with infection using logistic regression. Herd infection status as predicted from the final risk factor model was compared with the observed status using heat maps to assess how well the model fitted the observed spatial pattern. Results: During the investigated period (2011–2013), an increase in annual herd prevalence was noted (2011–25.6%; 2012–28.4%; 2013–29.3%). The spatial analysis suggested significant clustering of positive and negative herds. Presence of streams, wetlands and pastures on farms showed a significant association with the presence of infection in cattle herds. Buying animals from positive herds was a risk factor on conventional farms. Additionally, risk of being infected with F. hepatica was higher in non-dairy herds of medium size (=30 and <100) when compared to dairy and large (=100) cattle herds. The observed spatial pattern could be reproduced by predictions of the risk factor model. Conclusions: This study showed an increase in annual herd level prevalence (2011 to 2013) indicating that an increasing proportion of herds are infected with F. hepatica infection every year in Denmark. Fasciolosis was found to be associated with both herd and environmental factors where the infection was influenced by local factors that clustered geographically. en application/pdf https://research.wur.nl/en/publications/prevalence-risk-factors-and-spatial-analysis-of-liver-fluke-infec 10.1186/s13071-015-0773-x https://edepot.wur.nl/336930 Cattle Denmark Fasciola hepatica Prevalence Risk factors Spatial model https://creativecommons.org/licenses/by/4.0/ Wageningen University & Research
institution WUR NL
collection DSpace
country Países bajos
countrycode NL
component Bibliográfico
access En linea
databasecode dig-wur-nl
tag biblioteca
region Europa del Oeste
libraryname WUR Library Netherlands
language English
topic Cattle
Denmark
Fasciola hepatica
Prevalence
Risk factors
Spatial model
Cattle
Denmark
Fasciola hepatica
Prevalence
Risk factors
Spatial model
spellingShingle Cattle
Denmark
Fasciola hepatica
Prevalence
Risk factors
Spatial model
Cattle
Denmark
Fasciola hepatica
Prevalence
Risk factors
Spatial model
Olsen, A.
Frankena, K.
Bodker, R.
Toft, N.
Thamsborg, S.M.
Enemark, H.L.
Halasa, T.
Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
description Background: Fasciola hepatica, a trematode parasite (liver fluke), infects a wide range of host species causing fasciolosis. The disease is prevalent world-wide and causes considerable economic losses to the livestock industry. Fasciolosis is regarded as an emerging food-borne zoonosis. To promote awareness among farmers and to implement strategies to control the infection, this study examined the prevalence, spatial distribution and risk factors for F. hepatica infection in Danish cattle herds. Methods: A retrospective population based study was performed using meat inspection data of approximately 1.5 million cattle slaughtered in the period 2011 to 2013. Annual cumulative prevalence of recorded liver fluke findings was calculated for each year. Global and local spatial cluster analysis was used to identify and map spatial patterns of F. hepatica positive and negative herds to explore environmental indicators of infection. Herd level, trade and environmental risk factors were evaluated for association with infection using logistic regression. Herd infection status as predicted from the final risk factor model was compared with the observed status using heat maps to assess how well the model fitted the observed spatial pattern. Results: During the investigated period (2011–2013), an increase in annual herd prevalence was noted (2011–25.6%; 2012–28.4%; 2013–29.3%). The spatial analysis suggested significant clustering of positive and negative herds. Presence of streams, wetlands and pastures on farms showed a significant association with the presence of infection in cattle herds. Buying animals from positive herds was a risk factor on conventional farms. Additionally, risk of being infected with F. hepatica was higher in non-dairy herds of medium size (=30 and <100) when compared to dairy and large (=100) cattle herds. The observed spatial pattern could be reproduced by predictions of the risk factor model. Conclusions: This study showed an increase in annual herd level prevalence (2011 to 2013) indicating that an increasing proportion of herds are infected with F. hepatica infection every year in Denmark. Fasciolosis was found to be associated with both herd and environmental factors where the infection was influenced by local factors that clustered geographically.
format Article/Letter to editor
topic_facet Cattle
Denmark
Fasciola hepatica
Prevalence
Risk factors
Spatial model
author Olsen, A.
Frankena, K.
Bodker, R.
Toft, N.
Thamsborg, S.M.
Enemark, H.L.
Halasa, T.
author_facet Olsen, A.
Frankena, K.
Bodker, R.
Toft, N.
Thamsborg, S.M.
Enemark, H.L.
Halasa, T.
author_sort Olsen, A.
title Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
title_short Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
title_full Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
title_fullStr Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
title_full_unstemmed Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds
title_sort prevalence, risk factors and spatial analysis of liver fluke infections in danish cattle herds
url https://research.wur.nl/en/publications/prevalence-risk-factors-and-spatial-analysis-of-liver-fluke-infec
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AT toftn prevalenceriskfactorsandspatialanalysisofliverflukeinfectionsindanishcattleherds
AT thamsborgsm prevalenceriskfactorsandspatialanalysisofliverflukeinfectionsindanishcattleherds
AT enemarkhl prevalenceriskfactorsandspatialanalysisofliverflukeinfectionsindanishcattleherds
AT halasat prevalenceriskfactorsandspatialanalysisofliverflukeinfectionsindanishcattleherds
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