Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.vetpar.2015.10.024 http://hdl.handle.net/11449/172603 |
Resumo: | Using field trials, artificial infestations (Stall tests) and in vitro adult immersion tests, the present study evaluated the acaricidal efficacy of 12.5% amitraz administered via whole body spraying against a Rhipicephalus (Boophilus) microplus population that did not have any contact with chemical products belonging to this acaricide family for 10 years (approximately 40 generations). Two natural infestation trials, two artificial infestation trials (Stall tests) and two adult immersion tests were performed in two different stages in 2005 and 2015. Between 2002 and 2015, the bovine herd of this property was formed by approximately 450 animals from the Simmental breed that were divided into nine paddocks formed by Cynodon dactylon (L.) Pers. For the natural infestation experiments in 2005 and 2015, we selected nearly 70 animals naturally infested with ticks from the same herd that belonged to the São Paulo farm located in São José do Rio Pardo, São Paulo, Brazil. Field studies were performed in the same paddock (9). To evaluate anti-R. (B.) microplus activity in the artificially infested cattle (Stall tests) and adult immersion tests, two experiments of each methodology were performed at CPPAR (the Center of Research in Animal Health located on the FCAV/UNESP campus in Jaboticabal, São Paulo, Brazil) in 2005 and 2015. R. (B.) microplus used in the artificial infestation, and adult immersion test experiments were obtained from paddocks 1-9 in 2005 and 2015 from the commercial farm where the field studies were performed. Based on the obtained results, it was possible to conclude that amitraz use in rotation with pyrethroids every 28 days for three consecutive years (2002-2004) previous to the beginning of the first trial (2005) was sufficient to generate a R. (B.) microplus strain resistant to amitraz. Moreover, using field trials, artificial infestations (Stall tests) and adult immersion tests, we verified that 40 generations of the tick species with no contact to the aforementioned compound (amitraz) were not sufficient to revert or modify the efficacy/resistance of amitraz for this analyzed R. (B.) microplus strain. The reversion of amitraz efficacy values in R. (B.) microplus may only occur when resistance of the field strain is incipient. Alternatively, the differences in the results may be due to differences in the Rhipicephalus spp. species between current study locations. Therefore, future studies must be performed to prove this hypothesis. |
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spelling |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion testsArtificial infestationsNatural infestationResistanceSpray formulationsStall testUsing field trials, artificial infestations (Stall tests) and in vitro adult immersion tests, the present study evaluated the acaricidal efficacy of 12.5% amitraz administered via whole body spraying against a Rhipicephalus (Boophilus) microplus population that did not have any contact with chemical products belonging to this acaricide family for 10 years (approximately 40 generations). Two natural infestation trials, two artificial infestation trials (Stall tests) and two adult immersion tests were performed in two different stages in 2005 and 2015. Between 2002 and 2015, the bovine herd of this property was formed by approximately 450 animals from the Simmental breed that were divided into nine paddocks formed by Cynodon dactylon (L.) Pers. For the natural infestation experiments in 2005 and 2015, we selected nearly 70 animals naturally infested with ticks from the same herd that belonged to the São Paulo farm located in São José do Rio Pardo, São Paulo, Brazil. Field studies were performed in the same paddock (9). To evaluate anti-R. (B.) microplus activity in the artificially infested cattle (Stall tests) and adult immersion tests, two experiments of each methodology were performed at CPPAR (the Center of Research in Animal Health located on the FCAV/UNESP campus in Jaboticabal, São Paulo, Brazil) in 2005 and 2015. R. (B.) microplus used in the artificial infestation, and adult immersion test experiments were obtained from paddocks 1-9 in 2005 and 2015 from the commercial farm where the field studies were performed. Based on the obtained results, it was possible to conclude that amitraz use in rotation with pyrethroids every 28 days for three consecutive years (2002-2004) previous to the beginning of the first trial (2005) was sufficient to generate a R. (B.) microplus strain resistant to amitraz. Moreover, using field trials, artificial infestations (Stall tests) and adult immersion tests, we verified that 40 generations of the tick species with no contact to the aforementioned compound (amitraz) were not sufficient to revert or modify the efficacy/resistance of amitraz for this analyzed R. (B.) microplus strain. The reversion of amitraz efficacy values in R. (B.) microplus may only occur when resistance of the field strain is incipient. Alternatively, the differences in the results may be due to differences in the Rhipicephalus spp. species between current study locations. Therefore, future studies must be performed to prove this hypothesis.CPPAR-Animal Health Research Center Faculdade de Ciências Agrárias e Veterinárias UNESP Campus de Jaboticabal, Via de Acesso Prof. Paulo Donatto Castellane, s/nInstituto de Patologia Tropical e Saúde Pública Universidade Federal de GoiásCPPAR-Animal Health Research Center Faculdade de Ciências Agrárias e Veterinárias UNESP Campus de Jaboticabal, Via de Acesso Prof. Paulo Donatto Castellane, s/nUniversidade Estadual Paulista (Unesp)Universidade Federal de Goiás (UFG)Maciel, Willian Giquelin [UNESP]Lopes, Welber Daniel Zanetti [UNESP]Cruz, Breno Cayeiro [UNESP]Gomes, Lucas Vinicius Costa [UNESP]Teixeira, Weslen Fabrício Pires [UNESP]Buzzulini, Carolina [UNESP]Bichuette, Murilo Abud [UNESP]Campos, Gabriel Pimentel [UNESP]Felippelli, Gustavo [UNESP]Soares, Vando Edésio [UNESP]de Oliveira, Gilson Pereira [UNESP]da Costa, Alvimar José [UNESP]2018-12-11T17:01:19Z2018-12-11T17:01:19Z2015-12-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article233-241application/pdfhttp://dx.doi.org/10.1016/j.vetpar.2015.10.024Veterinary Parasitology, v. 214, n. 3-4, p. 233-241, 2015.1873-25500304-4017http://hdl.handle.net/11449/17260310.1016/j.vetpar.2015.10.0242-s2.0-849593545762-s2.0-84959354576.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengVeterinary Parasitology1,275info:eu-repo/semantics/openAccess2024-04-12T13:07:01Zoai:repositorio.unesp.br:11449/172603Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-12T13:07:01Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
title |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
spellingShingle |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests Maciel, Willian Giquelin [UNESP] Artificial infestations Natural infestation Resistance Spray formulations Stall test |
title_short |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
title_full |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
title_fullStr |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
title_full_unstemmed |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
title_sort |
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests |
author |
Maciel, Willian Giquelin [UNESP] |
author_facet |
Maciel, Willian Giquelin [UNESP] Lopes, Welber Daniel Zanetti [UNESP] Cruz, Breno Cayeiro [UNESP] Gomes, Lucas Vinicius Costa [UNESP] Teixeira, Weslen Fabrício Pires [UNESP] Buzzulini, Carolina [UNESP] Bichuette, Murilo Abud [UNESP] Campos, Gabriel Pimentel [UNESP] Felippelli, Gustavo [UNESP] Soares, Vando Edésio [UNESP] de Oliveira, Gilson Pereira [UNESP] da Costa, Alvimar José [UNESP] |
author_role |
author |
author2 |
Lopes, Welber Daniel Zanetti [UNESP] Cruz, Breno Cayeiro [UNESP] Gomes, Lucas Vinicius Costa [UNESP] Teixeira, Weslen Fabrício Pires [UNESP] Buzzulini, Carolina [UNESP] Bichuette, Murilo Abud [UNESP] Campos, Gabriel Pimentel [UNESP] Felippelli, Gustavo [UNESP] Soares, Vando Edésio [UNESP] de Oliveira, Gilson Pereira [UNESP] da Costa, Alvimar José [UNESP] |
author2_role |
author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Goiás (UFG) |
dc.contributor.author.fl_str_mv |
Maciel, Willian Giquelin [UNESP] Lopes, Welber Daniel Zanetti [UNESP] Cruz, Breno Cayeiro [UNESP] Gomes, Lucas Vinicius Costa [UNESP] Teixeira, Weslen Fabrício Pires [UNESP] Buzzulini, Carolina [UNESP] Bichuette, Murilo Abud [UNESP] Campos, Gabriel Pimentel [UNESP] Felippelli, Gustavo [UNESP] Soares, Vando Edésio [UNESP] de Oliveira, Gilson Pereira [UNESP] da Costa, Alvimar José [UNESP] |
dc.subject.por.fl_str_mv |
Artificial infestations Natural infestation Resistance Spray formulations Stall test |
topic |
Artificial infestations Natural infestation Resistance Spray formulations Stall test |
description |
Using field trials, artificial infestations (Stall tests) and in vitro adult immersion tests, the present study evaluated the acaricidal efficacy of 12.5% amitraz administered via whole body spraying against a Rhipicephalus (Boophilus) microplus population that did not have any contact with chemical products belonging to this acaricide family for 10 years (approximately 40 generations). Two natural infestation trials, two artificial infestation trials (Stall tests) and two adult immersion tests were performed in two different stages in 2005 and 2015. Between 2002 and 2015, the bovine herd of this property was formed by approximately 450 animals from the Simmental breed that were divided into nine paddocks formed by Cynodon dactylon (L.) Pers. For the natural infestation experiments in 2005 and 2015, we selected nearly 70 animals naturally infested with ticks from the same herd that belonged to the São Paulo farm located in São José do Rio Pardo, São Paulo, Brazil. Field studies were performed in the same paddock (9). To evaluate anti-R. (B.) microplus activity in the artificially infested cattle (Stall tests) and adult immersion tests, two experiments of each methodology were performed at CPPAR (the Center of Research in Animal Health located on the FCAV/UNESP campus in Jaboticabal, São Paulo, Brazil) in 2005 and 2015. R. (B.) microplus used in the artificial infestation, and adult immersion test experiments were obtained from paddocks 1-9 in 2005 and 2015 from the commercial farm where the field studies were performed. Based on the obtained results, it was possible to conclude that amitraz use in rotation with pyrethroids every 28 days for three consecutive years (2002-2004) previous to the beginning of the first trial (2005) was sufficient to generate a R. (B.) microplus strain resistant to amitraz. Moreover, using field trials, artificial infestations (Stall tests) and adult immersion tests, we verified that 40 generations of the tick species with no contact to the aforementioned compound (amitraz) were not sufficient to revert or modify the efficacy/resistance of amitraz for this analyzed R. (B.) microplus strain. The reversion of amitraz efficacy values in R. (B.) microplus may only occur when resistance of the field strain is incipient. Alternatively, the differences in the results may be due to differences in the Rhipicephalus spp. species between current study locations. Therefore, future studies must be performed to prove this hypothesis. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12-15 2018-12-11T17:01:19Z 2018-12-11T17:01:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.vetpar.2015.10.024 Veterinary Parasitology, v. 214, n. 3-4, p. 233-241, 2015. 1873-2550 0304-4017 http://hdl.handle.net/11449/172603 10.1016/j.vetpar.2015.10.024 2-s2.0-84959354576 2-s2.0-84959354576.pdf |
url |
http://dx.doi.org/10.1016/j.vetpar.2015.10.024 http://hdl.handle.net/11449/172603 |
identifier_str_mv |
Veterinary Parasitology, v. 214, n. 3-4, p. 233-241, 2015. 1873-2550 0304-4017 10.1016/j.vetpar.2015.10.024 2-s2.0-84959354576 2-s2.0-84959354576.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Veterinary Parasitology 1,275 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
233-241 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965604883464192 |