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| Registros recuperados : 10 | |
| 3. |  | PORTILHO, A. I.; GIGLIOTI, R.; OLIVEIRA, H. N. de; MARCONDES, C. R.; OKINO, C. H.; OLIVEIRA, M. C. de S. Associação entre os níveis de infecção por Babesia bovis e Babesia bigemina em amostras de sangue e carrapatos Rhipicephalus microplus colhidos em bovinos da raça Canchim. In: JORNADA CIENTÍFICA DA EMBRAPA SÃO CARLOS, 9., 2017, São Carlos, SP. Anais... São Carlos, SP: Embrapa Pecuária Sudeste; Embrapa Instrumentação, 2017. p. 37. (Embrapa Pecuária Sudeste. Documentos, 126). Editores técnicos: Alexandre Berndt, Ana Rita Araujo Nogueira, Bianca Baccili Zanotto Vigna, Juliana Gonçalves Costa, Lea Chapaval, Manuel Antonio Chagas Jacinto, Patricia Menezes Santos.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 5. | | LIMA, G. T. de; RODRIGUES, T. S.; PORTILHO, A. I.; CORREA, V. A.; GASPAR, E. B.; DE GASPARI, E. Immune responses of meningococcal B outer membrane vesicles in middle-aged mice. Pathogens and Disease, v. 78, n. 5, ftaa028, July, 2020.| Biblioteca(s): Embrapa Pecuária Sul. |
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| 6. | | GIGLIOTI, R.; OLIVEIRA, H. N. de; BILHASSI, T. B.; PORTILHO, A. I.; OKINO, C. H.; MARCONDES, C. R.; OLIVEIRA, M. C. de S. Estimates of repeatability and correlations of hemoparasites infection levels for cattle reared in endemic areas for Rhipicephalus microplus. Veterinary Parasitology, v. 250, p. 78-84, jan. 2018.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 7. | | GIGLIOTI, R.; BILHASSI, T. B.; SANTANA, C. H.; PORTILHO, A. I.; MACHADO, R. Z.; OLIVEIRA, H. N. de; MARCONDES, C. R.; OLIVEIRA, M. C. de S. Correlação entre os níveis de infecção por Babesia bovis, Babesia bigemina e Anaplasma marginale determinados por qPCR e infestações por Rhipicephalus microplus em fêmeas Canchim. In: CONGRESO DA LA ASOCIACIÓN LATINOAMERICANA DE PRODUCCIÓN ANIMAL, 25., 2016, Pernambuco. Anais... Pernambuco: SNPA, 2016.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 8. | | GIGLIOTI, R.; BILHASSI, T. B.; PORTILHO, A. I.; GONÇALVES, T. C.; NEO, T. A.; MARCONDES, C. R.; OLIVEIRA, H. N. de; OLIVEIRA, M. C. de S. Estudo da resistência a endoparasitas em duas linhagens de bovinos da raça canchim. In: CONGRESO DA LA ASOCIACIÓN LATINOAMERICANA DE PRODUCCIÓN ANIMAL, 25., 2016, Pernambuco. Anais... Pernambuco: SNPA, 2016.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 9. | | GIGLIOTI, R.; BILHASSI, T. B.; GONÇALVES, T. C.; SANTANA, C. H.; PORTILHO, A. I.; MARCONDES, C. R.; OLIVEIRA, H. N. de; OLIVEIRA, M. C. de S. Comparação de linhagens da raça Canchim quanto à resistência aos ectoparasitas. In: CONGRESO DA LA ASOCIACIÓN LATINOAMERICANA DE PRODUCCIÓN ANIMAL, 25., 2016, Pernambuco. Anais... Pernambuco: SNPA, 2016.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 10. | | BRITO, L. T.; RINALDI, F. M.; GASPAR, E. B.; CORREA, V. A.; GONÇALVES, C. A.; PORTILHO, A. I.; LIMA, G. T. de; GASPARI, E. DE. Study of different routes of immunization using outer membranevesicles ofNeisseria meningitidisB and comparison of two adjuvants. Vaccine, v. 38, n. 48, p. 7674-7682, Nov. 2020.| Biblioteca(s): Embrapa Pecuária Sul. |
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| Registros recuperados : 10 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
31/01/2018 |
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Data da última atualização: |
23/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
GIGLIOTI, R.; OLIVEIRA, H. N. de; BILHASSI, T. B.; PORTILHO, A. I.; OKINO, C. H.; MARCONDES, C. R.; OLIVEIRA, M. C. de S. |
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Afiliação: |
Rodrigo Giglioti, UNESP; Henrique Nunes de Oliveira, UNESP; Talita Barban Bilhassi, UNESP; Amanda Izeli Portilho, Bolsista/Embrapa Pecuária Sudeste; CINTIA HIROMI OKINO, CPPSE; CINTIA RIGHETTI MARCONDES, CPPSE; MARCIA CRISTINA DE SENA OLIVEIRA, CPPSE. |
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Título: |
Estimates of repeatability and correlations of hemoparasites infection levels for cattle reared in endemic areas for Rhipicephalus microplus. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 250, p. 78-84, jan. 2018. |
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DOI: |
10.1016/j.vetpar.2017.12.010 |
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Idioma: |
Português |
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Conteúdo: |
Rhipicephalus microplus is a vector of cattle tick fever, a disease caused by the protozoans Babesia bovisand B. bigemina, and also anaplasmosis, produced by the Rickettsiales Anaplasma marginale. These tick-borne pathogens cause considerable losses to Brazilian livestock breeders and represent an obstacle to the expanded use of taurine breeds due to their higher sensitivity to ticks and hemoparasites compared to zebu breeds. Differences in the susceptibility to hemoparasites were also verified within breeds, suggesting that may be possible to select a most resistant phenotype. Therefore, repeatability of R. microplus counts and copy number of hemoparasites DNA were estimated, along with correlations between themselves, aiming to verify if those measures can be used as parameters to classify animals according to their parasite resistance degrees. Forty-two Canchim females kept on pastures naturally infested by ticks were evaluated for the level of infestation by R. microplus and infection by B. bovis, B. bigemina, and A. marginale. Twenty-four evaluations were performed once a month, for adult female ticks counts and blood samplings. The experimental period was divided into four phases, according to the animals age range: Phase 1: 8 to 13 months (collections 1 to 6); phase 2: 14 to 19 months (collections 7 to 12); phase 3: 20 to 25 months (collections 13 to 18), and phase 4: 26 to 31 months (collections 19 to 24). Blood samples were submitted to absolute quantification of hemoparasites DNA sequences using qPCR. The hemoparasite and tick counts data were transformed for normalization and were analyzed using mixed models. Among three species of hemoparasites studied, A. marginale presented the highest level of infection. During phase 3, B. bigemina presented higher infection levels (p < 0.05) compared to B. bovis, whereas no differences were observed in other phases. Estimated repeatabilities for parasite infection levels varied from low to moderate during our experiment. There were low correlations between tick counts and parasite infection levels, and between parasite infection levels from different species by themselves. Based on these results, under conditions of the present study, we suggest that it is possible to identify animals presenting a most resistant phenotype against infection by both hemoparasites and ticks. Moreover, the animal age may be an important factor related to resistance against these pathogens. The data obtained shed more light on the resistance to hemoparasites studied. MenosRhipicephalus microplus is a vector of cattle tick fever, a disease caused by the protozoans Babesia bovisand B. bigemina, and also anaplasmosis, produced by the Rickettsiales Anaplasma marginale. These tick-borne pathogens cause considerable losses to Brazilian livestock breeders and represent an obstacle to the expanded use of taurine breeds due to their higher sensitivity to ticks and hemoparasites compared to zebu breeds. Differences in the susceptibility to hemoparasites were also verified within breeds, suggesting that may be possible to select a most resistant phenotype. Therefore, repeatability of R. microplus counts and copy number of hemoparasites DNA were estimated, along with correlations between themselves, aiming to verify if those measures can be used as parameters to classify animals according to their parasite resistance degrees. Forty-two Canchim females kept on pastures naturally infested by ticks were evaluated for the level of infestation by R. microplus and infection by B. bovis, B. bigemina, and A. marginale. Twenty-four evaluations were performed once a month, for adult female ticks counts and blood samplings. The experimental period was divided into four phases, according to the animals age range: Phase 1: 8 to 13 months (collections 1 to 6); phase 2: 14 to 19 months (collections 7 to 12); phase 3: 20 to 25 months (collections 13 to 18), and phase 4: 26 to 31 months (collections 19 to 24). Blood samples were submitted to absolute quantification of he... Mostrar Tudo |
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Palavras-Chave: |
Tick fever. |
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Thesaurus NAL: |
cattle; repeatability. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/171905/1/1-s2.0-S0304401717305162-main.pdf
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|
Marc: |
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100 1 $aGIGLIOTI, R.
245 $aEstimates of repeatability and correlations of hemoparasites infection levels for cattle reared in endemic areas for Rhipicephalus microplus.$h[electronic resource]
260 $c2018
520 $aRhipicephalus microplus is a vector of cattle tick fever, a disease caused by the protozoans Babesia bovisand B. bigemina, and also anaplasmosis, produced by the Rickettsiales Anaplasma marginale. These tick-borne pathogens cause considerable losses to Brazilian livestock breeders and represent an obstacle to the expanded use of taurine breeds due to their higher sensitivity to ticks and hemoparasites compared to zebu breeds. Differences in the susceptibility to hemoparasites were also verified within breeds, suggesting that may be possible to select a most resistant phenotype. Therefore, repeatability of R. microplus counts and copy number of hemoparasites DNA were estimated, along with correlations between themselves, aiming to verify if those measures can be used as parameters to classify animals according to their parasite resistance degrees. Forty-two Canchim females kept on pastures naturally infested by ticks were evaluated for the level of infestation by R. microplus and infection by B. bovis, B. bigemina, and A. marginale. Twenty-four evaluations were performed once a month, for adult female ticks counts and blood samplings. The experimental period was divided into four phases, according to the animals age range: Phase 1: 8 to 13 months (collections 1 to 6); phase 2: 14 to 19 months (collections 7 to 12); phase 3: 20 to 25 months (collections 13 to 18), and phase 4: 26 to 31 months (collections 19 to 24). Blood samples were submitted to absolute quantification of hemoparasites DNA sequences using qPCR. The hemoparasite and tick counts data were transformed for normalization and were analyzed using mixed models. Among three species of hemoparasites studied, A. marginale presented the highest level of infection. During phase 3, B. bigemina presented higher infection levels (p < 0.05) compared to B. bovis, whereas no differences were observed in other phases. Estimated repeatabilities for parasite infection levels varied from low to moderate during our experiment. There were low correlations between tick counts and parasite infection levels, and between parasite infection levels from different species by themselves. Based on these results, under conditions of the present study, we suggest that it is possible to identify animals presenting a most resistant phenotype against infection by both hemoparasites and ticks. Moreover, the animal age may be an important factor related to resistance against these pathogens. The data obtained shed more light on the resistance to hemoparasites studied.
650 $acattle
650 $arepeatability
653 $aTick fever
700 1 $aOLIVEIRA, H. N. de
700 1 $aBILHASSI, T. B.
700 1 $aPORTILHO, A. I.
700 1 $aOKINO, C. H.
700 1 $aMARCONDES, C. R.
700 1 $aOLIVEIRA, M. C. de S.
773 $tVeterinary Parasitology$gv. 250, p. 78-84, jan. 2018.
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Embrapa Pecuária Sudeste (CPPSE) |
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