La Trobe
1170332_Kelley,J_2021.pdf (1.8 MB)

Fasciola hepatica Control Practices on a Sample of Dairy Farms in Victoria, Australia

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journal contribution
posted on 02.07.2021, 05:15 by Jane Kelley, Grant Rawlin, Travis Beddoe, M Stevenson, Terry Spithill
In Australia, little is known about the strategies used by farmers to control Fasciola hepatica (F. hepatica) infection in dairy cattle. Triclabendazole-resistant F. hepatica have recently been found on several dairy and beef properties in Australia. It is difficult to draw conclusions about how widespread resistance is in Australian dairy cattle because we have little information about flukicide usage, drug resistance testing, and alternative flukicide usage on-farm. The study objectives were to determine how dairy farmers are currently controlling F. hepatica and to identify knowledge gaps where F. hepatica control strategies need to be communicated to farmers to improve management. The survey was distributed online or by hard copy and 36 dairy farmers completed the survey. There were 34 questions including closed, open-ended, multicheck box, demographic, and text questions. Descriptive statistics were used to quantify each response. The survey results showed high use of clorsulon, limited rotation of flukicides, and limited use of diagnostic tests to inform treatment options and timing. There was poor adherence to best management practice in determining the dose of flukicides administered to cattle, with farmers often relying on estimating body weights or average body weights, suggesting that underdosing of animals is likely to be prevalent. Most respondents in this study did not isolate and quarantine treated and newly returned or purchased animals before joining them with the main herd. The research identified four knowledge gaps where communication needs to be enhanced to improve control of F. hepatica: diagnostic testing to inform flukicide use, rotation of flukicide actives, flukicide administration, and increased testing of replacement animals.

Funding

This work was supported by funds from the Gardiner Dairy Foundation and Dairy Australia. This funding provided operational expenditure and salary support for the project entitled Novel approaches to control the current threat of liver fluke in Victorian dairy herds. La Trobe University provided Ph.D. stipend support, in kind support, and supervised the project. The VictorianDepartment of Jobs, Precincts and Regions provided in kind support, and co supervised the project.

History

Publication Date

04/06/2021

Journal

Frontiers in Veterinary Science

Volume

8

Article Number

ARTN 669117

Pagination

12p.

Publisher

FRONTIERS MEDIA SA

ISSN

2297-1769

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