000088328 001__ 88328
000088328 005__ 20240123082600.0
000088328 0247_ $$2doi$$a10.1016/j.vetpar.2019.109018
000088328 0248_ $$2sideral$$a115751
000088328 037__ $$aART-2020-115751
000088328 041__ $$aeng
000088328 100__ $$0(orcid)0000-0001-5028-947X$$aCalvete, Carlos
000088328 245__ $$aAssessment of targeted selective treatment criteria to control subclinical gastrointestinal nematode infections on sheep farms
000088328 260__ $$c2020
000088328 5060_ $$aAccess copy available to the general public$$fUnrestricted
000088328 5203_ $$aControl of sheep gastrointestinal nematode (GIN) infections mostly relies on the use of anthelmintics. Refugia-based control strategies as targeted selective treatments (TST) can delay anthelmintic resistance development, but the optimal decision criteria for selecting individuals to be treated in subclinical infection scenarios remain unclear. The present study aimed to evaluate the suitability of body condition score (BCS) and faecal egg counts (FEC) as treatment indicators and to determine their optimized threshold values for treatment in TST by determining the relationships of BCS, FEC and anthelmintic treatment with several productive parameters in pre-mating and pre-partum periods at an individual level. Deworming in pre-mating period increased BCS gain, but its magnitude was directly associated with strongyle FEC before treatment. Deworming also increased fertility in ewes with BCS < 2.75 and the proportion of lambing ewes that got pregnant during the first ovulation cycle. Nevertheless, treatment did not yield productive benefits in ewes with higher BCS values. On the other hand, deworming in the pre-partum lowered lamb peri-partum mortality and increased lamb weight at birth and the growth of lambs during lactation, especially in lambs born from ewes with strongyle FEC > 400 epg before treatment. These results showed that FEC and especially BCS can be potential decision criteria for the implementation of TST in these types of scenarios. The TST scheme derived from the present results on the control of GIN infections should include anthelmintic treatment of ewes with BCS lower than ˜ 3 approximately five weeks before mating and lambing. In the pre-lambing period, treatment may be unnecessary if flock mean strongyle FEC is lower than ˜ 200 epg, as the proportion of ewes with individual FEC > 400 epg would be very low. The results suggest that implementation of this TST scheme would provide benefits, such as the improvement of productivity, a rational management of parasites in refugia, and preservation of future efficacy of anthelmintics, in comparison to traditional deworming schemes.
000088328 536__ $$9info:eu-repo/grantAgreement/ES/INIA/RTA2013-00064-C02-01
000088328 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000088328 590__ $$a2.738$$b2020
000088328 591__ $$aVETERINARY SCIENCES$$b23 / 146 = 0.158$$c2020$$dQ1$$eT1
000088328 591__ $$aPARASITOLOGY$$b17 / 38 = 0.447$$c2020$$dQ2$$eT2
000088328 592__ $$a0.845$$b2020
000088328 593__ $$aMedicine (miscellaneous)$$c2020$$dQ1
000088328 593__ $$aVeterinary (miscellaneous)$$c2020$$dQ1
000088328 593__ $$aParasitology$$c2020$$dQ1
000088328 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000088328 700__ $$0(orcid)0000-0002-4655-9171$$aGonzález, José M.$$uUniversidad de Zaragoza
000088328 700__ $$0(orcid)0000-0003-0042-8800$$aFerrer, Luis M.$$uUniversidad de Zaragoza
000088328 700__ $$0(orcid)0000-0002-2724-2785$$aRamos, Juan J.$$uUniversidad de Zaragoza
000088328 700__ $$0(orcid)0000-0002-7822-6646$$aLacasta, Delia$$uUniversidad de Zaragoza
000088328 700__ $$aDelgado, Ignacio
000088328 700__ $$aUriarte, Joaquín
000088328 7102_ $$11009$$2617$$aUniversidad de Zaragoza$$bDpto. Patología Animal$$cÁrea Medicina y Cirugía Animal
000088328 773__ $$g277 (2020), 109018 1-9$$pVet. parasitol.$$tVETERINARY PARASITOLOGY$$x0304-4017
000088328 8564_ $$s537603$$uhttps://zaguan.unizar.es/record/88328/files/texto_completo.pdf$$yVersión publicada
000088328 8564_ $$s60315$$uhttps://zaguan.unizar.es/record/88328/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000088328 909CO $$ooai:zaguan.unizar.es:88328$$particulos$$pdriver
000088328 951__ $$a2024-01-23-08:21:13
000088328 980__ $$aARTICLE