Controle da coccidiose em ovinos utilizando o toltrazuril
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/14073 |
Resumo: | Coccidiosis in small ruminants is an infection caused by protozoan of genus Eimeria. Currently, at least eleven species parasite sheep, being E. ovinoidalis and E. crandallis the most pathogenic. The economic importance of coccidiosis in sheep livestock, mainly in intensive system and with high stock density, is related with losses caused by clinical and subclinical infection, causing decrease of the weight gain. Coccidiosis control can be accomplished using treatment that interrupt the life cycle of the parasite and with sanitary practices, both aiming decrease the environment contamination. Currently, coccidiosis is considering a neglected disease, however coccidia infection cause economic losses to ovine production. In this context, this thesis presents three chapters, which evaluated: (1) the efficacy, cost-benefit ratio, and economic break-even point of two different toltrazuril treatment regimens for suckling lambs naturally exposed to Eimeria spp. re-infection in a grazing system; (2) evaluated the effect of treatment with toltrazuril 5%, four and two weeks before the parturition in pregnant ewes, as well as the influence of it in the dynamics of infection of lambs naturally infected by Eimeria spp. in an extensive breeding system; (3) and evaluated the effect of toltrazuril 5% in a single dose in lambs maintained in a natural condition favorable to the development coccidiosis. Based on results, we emphasize that toltrazuril at the concentration assessed, has efficacy in lactating lambs and kept in condition to developmente coccidiosis. Treatment with toltrazuril at 14-day intervals was effective in controlling re-infection of lambs and a single dose can reduce the excretion of oocysts in lambs kept in conditions favorable to development coccidiosis. The use of toltrazuril 5% four and two weeks before the parturition reduced significantly oocyst excretion 21 days before the parturition and 14 days postpartum but did not influence the dynamics of lamb infection. E. ovinoidalis, E. crandallis, E. parva and E. ahsata were the frequently species identified causing mainly subclinical infection. Lambs kept in conditions favorable to development coccidiosis and lactating lambs treated with toltrazuril did not have a significant weight gain (p>0.05) than animals maintained naturally infected. Treatment with toltrazuril at the concentration assessed may be costly when the animals have subclinical infection, but where there are clinical cases and death, the use of this medicine may be economically viable. Economic viability of the treatment can be evaluated with the use of the economic model that aims to determine the point where the treatment becomes economically feasible. To control coccidiosis in sheep, should evaluate the specific situation of each property, the risks of developing the disease and if is necessary to use toltrazuril. |
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2018-08-21T18:29:55Z2018-08-21T18:29:55Z2018-02-08http://repositorio.ufsm.br/handle/1/14073Coccidiosis in small ruminants is an infection caused by protozoan of genus Eimeria. Currently, at least eleven species parasite sheep, being E. ovinoidalis and E. crandallis the most pathogenic. The economic importance of coccidiosis in sheep livestock, mainly in intensive system and with high stock density, is related with losses caused by clinical and subclinical infection, causing decrease of the weight gain. Coccidiosis control can be accomplished using treatment that interrupt the life cycle of the parasite and with sanitary practices, both aiming decrease the environment contamination. Currently, coccidiosis is considering a neglected disease, however coccidia infection cause economic losses to ovine production. In this context, this thesis presents three chapters, which evaluated: (1) the efficacy, cost-benefit ratio, and economic break-even point of two different toltrazuril treatment regimens for suckling lambs naturally exposed to Eimeria spp. re-infection in a grazing system; (2) evaluated the effect of treatment with toltrazuril 5%, four and two weeks before the parturition in pregnant ewes, as well as the influence of it in the dynamics of infection of lambs naturally infected by Eimeria spp. in an extensive breeding system; (3) and evaluated the effect of toltrazuril 5% in a single dose in lambs maintained in a natural condition favorable to the development coccidiosis. Based on results, we emphasize that toltrazuril at the concentration assessed, has efficacy in lactating lambs and kept in condition to developmente coccidiosis. Treatment with toltrazuril at 14-day intervals was effective in controlling re-infection of lambs and a single dose can reduce the excretion of oocysts in lambs kept in conditions favorable to development coccidiosis. The use of toltrazuril 5% four and two weeks before the parturition reduced significantly oocyst excretion 21 days before the parturition and 14 days postpartum but did not influence the dynamics of lamb infection. E. ovinoidalis, E. crandallis, E. parva and E. ahsata were the frequently species identified causing mainly subclinical infection. Lambs kept in conditions favorable to development coccidiosis and lactating lambs treated with toltrazuril did not have a significant weight gain (p>0.05) than animals maintained naturally infected. Treatment with toltrazuril at the concentration assessed may be costly when the animals have subclinical infection, but where there are clinical cases and death, the use of this medicine may be economically viable. Economic viability of the treatment can be evaluated with the use of the economic model that aims to determine the point where the treatment becomes economically feasible. To control coccidiosis in sheep, should evaluate the specific situation of each property, the risks of developing the disease and if is necessary to use toltrazuril.A coccidiose em pequenos ruminantes é uma infecção causada por protozoários do gênero Eimeria. Atualmente pelo menos onze espécies parasitam ovinos, sendo E. ovinoidalis e E. crandallis consideradas as mais patogênicas. A importância econômica da coccidiose nos rebanhos ovinos decorre principalmente da diminuição do ganho de peso relacionada à doença clínica e às infecções subclínicas, especialmente em criações intensivas e com alta densidade animal. O controle da coccidiose pode ser realizado com a utilização de fármacos que interrompam o ciclo do parasito e através de práticas sanitárias, ambas visando diminuir a contaminação ambiental. Atualmente, a coccidiose em ovinos é considerada uma doença negligenciada; a despeito das consideráveis perdas econômicas que causa à produção ovina. Diante do exposto acima, esta tese apresenta três capítulos, nos quais foram avaliados: (1) a eficácia, o custo/benefício e o ponto de equilíbrio econômico de dois diferentes regimes de tratamento utilizando o toltrazuril a 5% em cordeiros em lactação naturalmente expostos à reinfeção por Eimeria spp. em sistema de pasto; (2) o efeito do tratamento com toltrazuril a 5% quatro e duas semanas antes do parto na excreção de oocistos por ovelhas prenhas, bem como a influência na dinâmica de infecção pelo parasito nos seus cordeiros criados em sistema extensivo; e (3) a avaliação do efeito do tratamento com toltrazuril a 5% em cordeiros mantidos em condições naturais favoráveis ao desenvolvimento de coccidiose. Com base nos resultados obtidos, ressaltamos que o toltrazuril, na concentração avaliada, apresenta eficácia em cordeiros em lactação e mantidos em condições para o desenvolvimento de coccidiose. Utilizando o esquema de tratamento com intervalos a cada 14 dias os cordeiros permanecem protegidos da reinfecção por Eimeria spp. e uma dose única em cordeiros mantidos em condição de risco reduz a excreção de oocistos por até 35 dias. A utilização de toltrazuril a 5% quatro e duas semanas antes do parto em ovelhas reduziu significativamente a excreção de oocistos 21 dias antes do parto e 14 dias após o parto; entretanto, não influenciou na dinâmica de infecção dos cordeiros. E. ovinoidalis, E. crandallis, E. parva e E. ahsata foram as espécies mais frequentes causando principalmente infecção subclínica. Cordeiros em lactação e em condição de risco tratados com toltrazuril a 5% não apresentaram ganho de peso significativo em relação aos mantidos naturalmente infectados. O tratamento com toltrazuril na concentração testada apresenta alto custo quando os animais apresentam infecção subclínica, porém na ocorrência de casos clínicos e morte, a utilização deste medicamento pode ser economicamente viável. A viabilidade econômica do tratamento pode ser avaliada com a utilização do modelo econômico apresentado neste trabalho, modelo este que visa determinar o ponto de equilíbrio (breakeven point) a partir do qual o tratamento torna-se viável economicamente pela prevenção de perdas produtivas. Desta forma o controle da coccidiose em ovinos deve avaliar a situação específica de cada propriedade, bem como os riscos de desenvolvimento da doença e os potenciais prejuízos decorrentes dela e, assim, a necessidade de utilizar o toltrazuril.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de Ciências RuraisPrograma de Pós-Graduação em Medicina VeterináriaUFSMBrasilMedicina VeterináriaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessEimerioseCoccidioseApicomplexaEimeria ovinoidalisOvinoEimeriosisCoccidiosisApicomplexaEimeria ovinoidalisOvineCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIAControle da coccidiose em ovinos utilizando o toltrazurilControl of coccidiosis in sheep using toltrazurilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisBotton, Sônia de Avilahttp://lattes.cnpq.br/0814772095155945Vogel, Fernanda Silveira Floreshttp://lattes.cnpq.br/9676833435314493Leal, Marta Lizandra Rêgohttp://lattes.cnpq.br/6859797230596402Cezar, Alfredo Skrebskyhttp://lattes.cnpq.br/7530029885187885Pereira, Daniela Isabel Brayerhttp://lattes.cnpq.br/3382450720179401http://lattes.cnpq.br/7603522592193699Rodrigues, Fernando de Souza5005000000076004278f4f9-0866-450b-a20c-a7fcfa646000ad9860ef-386c-4465-b898-22e7a2c5512411b8bb68-1c71-48fc-8e97-b49ff00b2ef2f9d7c889-321f-4197-8d57-ad4148c5bd5584d2bc27-3f26-46ee-9aec-e1324bf8751472f9366d-edef-4d54-a32a-66232d4e7b4breponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGMV_2018_RODRIGUES_FERNANDO.pdfTES_PPGMV_2018_RODRIGUES_FERNANDO.pdfTese de Doutoradoapplication/pdf1577116http://repositorio.ufsm.br/bitstream/1/14073/1/TES_PPGMV_2018_RODRIGUES_FERNANDO.pdf457be592e058769a4c1a499addea226bMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Controle da coccidiose em ovinos utilizando o toltrazuril |
dc.title.alternative.eng.fl_str_mv |
Control of coccidiosis in sheep using toltrazuril |
title |
Controle da coccidiose em ovinos utilizando o toltrazuril |
spellingShingle |
Controle da coccidiose em ovinos utilizando o toltrazuril Rodrigues, Fernando de Souza Eimeriose Coccidiose Apicomplexa Eimeria ovinoidalis Ovino Eimeriosis Coccidiosis Apicomplexa Eimeria ovinoidalis Ovine CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
title_short |
Controle da coccidiose em ovinos utilizando o toltrazuril |
title_full |
Controle da coccidiose em ovinos utilizando o toltrazuril |
title_fullStr |
Controle da coccidiose em ovinos utilizando o toltrazuril |
title_full_unstemmed |
Controle da coccidiose em ovinos utilizando o toltrazuril |
title_sort |
Controle da coccidiose em ovinos utilizando o toltrazuril |
author |
Rodrigues, Fernando de Souza |
author_facet |
Rodrigues, Fernando de Souza |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Botton, Sônia de Avila |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0814772095155945 |
dc.contributor.referee1.fl_str_mv |
Vogel, Fernanda Silveira Flores |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/9676833435314493 |
dc.contributor.referee2.fl_str_mv |
Leal, Marta Lizandra Rêgo |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/6859797230596402 |
dc.contributor.referee3.fl_str_mv |
Cezar, Alfredo Skrebsky |
dc.contributor.referee3Lattes.fl_str_mv |
http://lattes.cnpq.br/7530029885187885 |
dc.contributor.referee4.fl_str_mv |
Pereira, Daniela Isabel Brayer |
dc.contributor.referee4Lattes.fl_str_mv |
http://lattes.cnpq.br/3382450720179401 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7603522592193699 |
dc.contributor.author.fl_str_mv |
Rodrigues, Fernando de Souza |
contributor_str_mv |
Botton, Sônia de Avila Vogel, Fernanda Silveira Flores Leal, Marta Lizandra Rêgo Cezar, Alfredo Skrebsky Pereira, Daniela Isabel Brayer |
dc.subject.por.fl_str_mv |
Eimeriose Coccidiose Apicomplexa Eimeria ovinoidalis Ovino |
topic |
Eimeriose Coccidiose Apicomplexa Eimeria ovinoidalis Ovino Eimeriosis Coccidiosis Apicomplexa Eimeria ovinoidalis Ovine CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
dc.subject.eng.fl_str_mv |
Eimeriosis Coccidiosis Apicomplexa Eimeria ovinoidalis Ovine |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
description |
Coccidiosis in small ruminants is an infection caused by protozoan of genus Eimeria. Currently, at least eleven species parasite sheep, being E. ovinoidalis and E. crandallis the most pathogenic. The economic importance of coccidiosis in sheep livestock, mainly in intensive system and with high stock density, is related with losses caused by clinical and subclinical infection, causing decrease of the weight gain. Coccidiosis control can be accomplished using treatment that interrupt the life cycle of the parasite and with sanitary practices, both aiming decrease the environment contamination. Currently, coccidiosis is considering a neglected disease, however coccidia infection cause economic losses to ovine production. In this context, this thesis presents three chapters, which evaluated: (1) the efficacy, cost-benefit ratio, and economic break-even point of two different toltrazuril treatment regimens for suckling lambs naturally exposed to Eimeria spp. re-infection in a grazing system; (2) evaluated the effect of treatment with toltrazuril 5%, four and two weeks before the parturition in pregnant ewes, as well as the influence of it in the dynamics of infection of lambs naturally infected by Eimeria spp. in an extensive breeding system; (3) and evaluated the effect of toltrazuril 5% in a single dose in lambs maintained in a natural condition favorable to the development coccidiosis. Based on results, we emphasize that toltrazuril at the concentration assessed, has efficacy in lactating lambs and kept in condition to developmente coccidiosis. Treatment with toltrazuril at 14-day intervals was effective in controlling re-infection of lambs and a single dose can reduce the excretion of oocysts in lambs kept in conditions favorable to development coccidiosis. The use of toltrazuril 5% four and two weeks before the parturition reduced significantly oocyst excretion 21 days before the parturition and 14 days postpartum but did not influence the dynamics of lamb infection. E. ovinoidalis, E. crandallis, E. parva and E. ahsata were the frequently species identified causing mainly subclinical infection. Lambs kept in conditions favorable to development coccidiosis and lactating lambs treated with toltrazuril did not have a significant weight gain (p>0.05) than animals maintained naturally infected. Treatment with toltrazuril at the concentration assessed may be costly when the animals have subclinical infection, but where there are clinical cases and death, the use of this medicine may be economically viable. Economic viability of the treatment can be evaluated with the use of the economic model that aims to determine the point where the treatment becomes economically feasible. To control coccidiosis in sheep, should evaluate the specific situation of each property, the risks of developing the disease and if is necessary to use toltrazuril. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-08-21T18:29:55Z |
dc.date.available.fl_str_mv |
2018-08-21T18:29:55Z |
dc.date.issued.fl_str_mv |
2018-02-08 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/14073 |
url |
http://repositorio.ufsm.br/handle/1/14073 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
500500000007 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Medicina Veterinária |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Medicina Veterinária |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional Manancial UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Repositório Institucional Manancial UFSM |
collection |
Repositório Institucional Manancial UFSM |
bitstream.url.fl_str_mv |
http://repositorio.ufsm.br/bitstream/1/14073/1/TES_PPGMV_2018_RODRIGUES_FERNANDO.pdf http://repositorio.ufsm.br/bitstream/1/14073/2/license_rdf http://repositorio.ufsm.br/bitstream/1/14073/3/license.txt http://repositorio.ufsm.br/bitstream/1/14073/4/TES_PPGMV_2018_RODRIGUES_FERNANDO.pdf.txt http://repositorio.ufsm.br/bitstream/1/14073/5/TES_PPGMV_2018_RODRIGUES_FERNANDO.pdf.jpg |
bitstream.checksum.fl_str_mv |
457be592e058769a4c1a499addea226b c1efe8e24d7281448e873be30ea326ff 2f0571ecee68693bd5cd3f17c1e075df 34d3d6b851fa62644a121cd006cbd8d1 3628367f2b5cc7a4feff5cdcce7b60d5 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional Manancial UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
ouvidoria@ufsm.br |
_version_ |
1808854714670907392 |