Population dynamics and evaluation of the partial selective treatment of crossbreed steers naturally infested with Rhipicephalus (Boophilus) microplus in a herd from the state of Minas Gerais in Brazil

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dc.contributor.authorCosta Gomes, Lucas Vinicius [UNESP]
dc.contributor.authorLopes, Welber Daniel Zanetti [UNESP]
dc.contributor.authorTeixeira, Weslen Fabricio Pires [UNESP]
dc.contributor.authorMaciel, Willian Giquelin [UNESP]
dc.contributor.authorCruz, Breno Cayeiro [UNESP]
dc.contributor.authorFelippelli, Gustavo [UNESP]
dc.contributor.authorBuzzulini, Carolina [UNESP]
dc.contributor.authorSoares, Vando Edésio [UNESP]
dc.contributor.authorMelo, Daniel Pacheco de [UNESP]
dc.contributor.authorBichuette, Murilo Abud [UNESP]
dc.contributor.authorGonçalves, Geraldo [UNESP]
dc.contributor.authorda Costa, Alvimar José [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.contributor.institutionUNICASTELO—Universidade Camilo Castelo Branco
dc.date.accessioned2018-12-11T17:07:50Z
dc.date.available2018-12-11T17:07:50Z
dc.date.issued2016-04-15
dc.description.abstractThe present study aimed to evaluate the population dynamics of Rhipicephalus (Boophilus) microplus over a period of 13 months on a rural property located in the state of Minas Gerais in southeastern Brazil. Animals were treated for ticks indoors by whole body spraying when R. (B.) microplus had an average count equal or more than 30 ticks. The study also evaluated the possibility of a partial selective treatment for bovines to control R. (B.) microplus in which only a percentage of the population would be treated (specifically those bovines with tick counts of ≥20. Moreover, we examined the percentage of the population of R. (B.) microplus present on experimental bovines that did not come into contact with the chemical compounds used in the partial selective treatment. We concluded that in this particular region of Brazil, the crossbreed steers support up to five R. (B.) microplus generations per year and that the number of generations was primarily affected by the pluviometric precipitation. We sprayed the bovines with chemicals seven times during the course of the study. The results of the partial selective treatment method revealed that during the rainy and the dry periods, 42.1% to 60.0% and 61.9% to 79.2% of the animals, respectively, fulfilled the criteria to receive a chemical treatment to reduce the number of cattle ticks. In consideration of the need to slow the development of tick resistance with the chemical compounds used in the spraying treatment, the results showed that the percentage of animals that did not require treatment is not relevant. This was evidenced by the result that bovines that presented tick counts of ≥20 during the dry and rainy periods represented 91.5% and 90.6% of the total recorded R. (B.) microplus populations, respectively. Only 8.7% of the tick population remained free from exposure to acaricides during the 13 months of the study, which is an important point when considering the adoption of the partial selective treatment method. Future studies with larger herds must be conducted on these topics; however, our results suggest that the partial selective treatment method most likely will not slow the development of resistance in this R. (B.) microplus population against the chemical compound used in this study.en
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias UNESP/CPPAR, Access route Prof. Paulo Donatto Castellane
dc.description.affiliationInstituto de Patologia Tropical e Saúde Pública Universidade Federal de Goiás
dc.description.affiliationUNICASTELO—Universidade Camilo Castelo Branco
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias UNESP/CPPAR, Access route Prof. Paulo Donatto Castellane
dc.format.extent72-76
dc.identifierhttp://dx.doi.org/10.1016/j.vetpar.2016.02.029
dc.identifier.citationVeterinary Parasitology, v. 220, p. 72-76.
dc.identifier.doi10.1016/j.vetpar.2016.02.029
dc.identifier.file2-s2.0-84995799577.pdf
dc.identifier.issn1873-2550
dc.identifier.issn0304-4017
dc.identifier.scopus2-s2.0-84995799577
dc.identifier.urihttp://hdl.handle.net/11449/173808
dc.language.isoeng
dc.relation.ispartofVeterinary Parasitology
dc.relation.ispartofsjr1,275
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGenerations
dc.subjectPartial treatment
dc.subjectResistance
dc.subjectSouthern cattle tick
dc.titlePopulation dynamics and evaluation of the partial selective treatment of crossbreed steers naturally infested with Rhipicephalus (Boophilus) microplus in a herd from the state of Minas Gerais in Brazilen
dc.typeArtigo
unesp.author.lattes4587241487071929[12]

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