Field Evaluation of Deltamethrin and Ivermectin Applications to Cattle on Culicoides Host-Alighting, Blood-Feeding, and Emergence

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dc.contributor.authorMurchie, Archie K.
dc.contributor.authorThompson, Geoff M.
dc.contributor.authorClawson, Sam
dc.contributor.authorBrown, Andrew
dc.contributor.authorGordon, Alan Wesley
dc.contributor.authorJess, Stephen
dc.date.accessioned2020-06-05T13:29:14Z
dc.date.available2020-06-05T13:29:14Z
dc.date.issued2019-08-08
dc.descriptionPublication history: accepted - 2 August 2019, published - 8 August 2019en_US
dc.description.abstractThe impact of topical applications of deltamethrin and ivermectin to cattle on Culicoides spp. landing and blood-feeding was studied in this work using sticky traps mounted on Friesian heifers’ backs. There was no effect of the insecticides on total numbers of Culicoides trapped or the proportion engorged. Deltamethrin and ivermectin treatment did not prevent blood-feeding on these animals. Deltamethrin did result in significant Culicoides mortality as evidenced by the numbers of dead midges combed from heifers’ upper flanks. The proximity of engorged midges on traps to dead midges in the hair suggests that blood-feeding took place despite midges receiving an ultimately lethal dose of deltamethrin. Ivermectin application resulted in a smaller proportion of nulliparous than parous females caught. There was no significant effect of ivermectin on the numbers of Culicoides that emerged from dung samples (but p was small at 0.095 for the Obsoletus group Culicoides). In cases of suspect animal imports, pour-on or spray applications of deltamethrin could reduce the risk of onward transmission of bluetongue virus.en_US
dc.description.sponsorshipThis project was funded by the Department of Agriculture, Environment and Rural Affairs (Northern Ireland) through the Evidence and Innovation Strategy (Project 16/3/07-48109).en_US
dc.identifierhttp://hdl.handle.net/20.500.12518/144
dc.identifier.citationMurchie, A. K., Thompson, G. M., Clawson, S., Brown, A., Gordon, A. W. and Jess, S. (2019) ‘Field Evaluation of Deltamethrin and Ivermectin Applications to Cattle on Culicoides Host-Alighting, Blood-Feeding, and Emergence’, Viruses. MDPI AG, 11(8), p. 731. doi: 10.3390/v11080731.en_US
dc.identifier.issn1999-4915
dc.identifier.urihttps://doi.org/10.3390/v11080731
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licenseen_US
dc.subjectculicoides, bluetongue, deltamethrin, ivermectin, sticky trapping, onward transmissionen_US
dc.titleField Evaluation of Deltamethrin and Ivermectin Applications to Cattle on Culicoides Host-Alighting, Blood-Feeding, and Emergenceen_US
dc.typeArticleen_US
dcterms.dateAccepted2019-08-02
dcterms.dateSubmitted2019-07-02

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