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Treatment against helminths in Norwegian sheep: a questionnaire-based survey

A questionnaire was distributed to 5487 farmers throughout Norway in order to obtain information about management practices regarding helminth infections in sheep. In addition, the farmers’ perceptions of helminths and anthelmintic efficacy were investigated. Most farmers (80%) treated prophylactica...

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Autores principales: Gravdal, Maiken, Robertson, Lucy J., Tysnes, Kristoffer R., Höglund, Johan, Chartier, Christophe, Stuen, Snorre
Formato: Online Artículo Texto
Lenguaje:English
Publicado: EDP Sciences 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649840/
https://www.ncbi.nlm.nih.gov/pubmed/34468310
http://dx.doi.org/10.1051/parasite/2021061
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author Gravdal, Maiken
Robertson, Lucy J.
Tysnes, Kristoffer R.
Höglund, Johan
Chartier, Christophe
Stuen, Snorre
author_facet Gravdal, Maiken
Robertson, Lucy J.
Tysnes, Kristoffer R.
Höglund, Johan
Chartier, Christophe
Stuen, Snorre
author_sort Gravdal, Maiken
collection PubMed
description A questionnaire was distributed to 5487 farmers throughout Norway in order to obtain information about management practices regarding helminth infections in sheep. In addition, the farmers’ perceptions of helminths and anthelmintic efficacy were investigated. Most farmers (80%) treated prophylactically against nematodes, and 24% also used prophylactic treatment against Fasciola hepatica. Overall, few farmers (11%) used parasitological analysis as a tool to assess the timing of treatment, but rather based it on other factors such as previous experience (70%). In the surveyed sheep flocks, the use of benzimidazoles was reduced from 2018 (52%) to 2019 (47%) (p < 0.01), whereas the use of macrocyclic lactones increased from 2017 (23%) to 2019 (36%) (p < 0.001). Poor anthelmintic efficacy was suspected by 10% of the farmers, and 11% reported that helminths were an increasing problem in their flocks. The majority of farmers (72%) considered their veterinarian as the most important advisor for treatment of parasites, but reported a high level of uncertainty regarding which parasites were present in their flocks, with unknown status most frequently reported for Haemonchus contortus (71.5%). This is probably related to the fact that very few farmers (15%) regularly test their animals for parasites. The present study provides up-to-date information on treatment practices for helminths in Norwegian sheep flocks.
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spelling pubmed-106498402021-01-01 Treatment against helminths in Norwegian sheep: a questionnaire-based survey Gravdal, Maiken Robertson, Lucy J. Tysnes, Kristoffer R. Höglund, Johan Chartier, Christophe Stuen, Snorre Parasite Research Article A questionnaire was distributed to 5487 farmers throughout Norway in order to obtain information about management practices regarding helminth infections in sheep. In addition, the farmers’ perceptions of helminths and anthelmintic efficacy were investigated. Most farmers (80%) treated prophylactically against nematodes, and 24% also used prophylactic treatment against Fasciola hepatica. Overall, few farmers (11%) used parasitological analysis as a tool to assess the timing of treatment, but rather based it on other factors such as previous experience (70%). In the surveyed sheep flocks, the use of benzimidazoles was reduced from 2018 (52%) to 2019 (47%) (p < 0.01), whereas the use of macrocyclic lactones increased from 2017 (23%) to 2019 (36%) (p < 0.001). Poor anthelmintic efficacy was suspected by 10% of the farmers, and 11% reported that helminths were an increasing problem in their flocks. The majority of farmers (72%) considered their veterinarian as the most important advisor for treatment of parasites, but reported a high level of uncertainty regarding which parasites were present in their flocks, with unknown status most frequently reported for Haemonchus contortus (71.5%). This is probably related to the fact that very few farmers (15%) regularly test their animals for parasites. The present study provides up-to-date information on treatment practices for helminths in Norwegian sheep flocks. EDP Sciences 2021-09-01 /pmc/articles/PMC10649840/ /pubmed/34468310 http://dx.doi.org/10.1051/parasite/2021061 Text en © M. Gravdal et al., published by EDP Sciences, 2021 https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0 (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Gravdal, Maiken
Robertson, Lucy J.
Tysnes, Kristoffer R.
Höglund, Johan
Chartier, Christophe
Stuen, Snorre
Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title_full Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title_fullStr Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title_full_unstemmed Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title_short Treatment against helminths in Norwegian sheep: a questionnaire-based survey
title_sort treatment against helminths in norwegian sheep: a questionnaire-based survey
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649840/
https://www.ncbi.nlm.nih.gov/pubmed/34468310
http://dx.doi.org/10.1051/parasite/2021061
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