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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
07/04/2026 |
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Data da última atualização: |
04/05/2026 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BELLO, H. J. S.; COSTA, E. C. da; CUNHA, A. F. da; KAPRITCHKOFF, R. T. I.; CORRÊA, L. G. P.; NICIURA, S. C. M.; ESTEVES, S. N.; SANTOS, L. A. L. dos; MINHO, A. P.; CHAGAS, A. C. de S. |
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Afiliação: |
HORNBLENDA JOAQUINA SILVA BELLO, FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO; ESTEVÃO CAMILLO DA COSTA, CENTRO UNIVERSITÁRIO CENTRAL PAULISTA; AMANDA FREITAS DA CUNHA, CENTRO UNIVERSITÁRIO CENTRAL PAULISTA; RAFAELA TAMI IKEDA KAPRITCHKOFF, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; LORRANE GABRIELE PINHEIRO CORRÊA, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; SIMONE CRISTINA MEO NICIURA, CPPSE; SERGIO NOVITA ESTEVES, CPPSE; LEONARDO APARECIDO LIMA DOS SANTOS, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; ALESSANDRO PELEGRINE MINHO, CPPSE; ANA CAROLINA DE SOUZA CHAGAS, CPPSE. |
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Título: |
Monitoring the second generation of lambs after Haemonchus contortus replacement in ewes: effects of climate, sheep breed, and integrated control strategies in the tropics. |
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Ano de publicação: |
2026 |
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Fonte/Imprenta: |
Veterinary Parasitology: regional studies and reports, v. 71, 101481, 2026. |
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ISSN: |
2405-9390 |
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DOI: |
https://doi.org/10.1016/j.vprsr.2026.101481 |
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Idioma: |
Inglês |
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Notas: |
Financiamento: FAPESP-Embrapa | FAPESP (Projeto #2021/02535-5 e #2021/11830-0). |
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Conteúdo: |
Anthelmintic resistance in Haemonchus contortus compromises parasite control and productivity in tropical sheep production systems. This study monitored the second generation of lambs following the H. contortus replacement. A multidrug-resistant H. contortus population was replaced by a susceptible isolate in periparturient ewes of the White Dorper (DO), Santa Inês (SI), and Texel (TX) breeds. They were kept in a nematode-free paddock (TR, n = 60) or in a paddock naturally infested with resistant helminths (PR, n = 60), and compared with untreated ewes harbouring resistant helminths from natural infection and kept in a naturally infested paddock (C, n = 60). The 121 lambs born in the second breeding season were phenotyped every 21 days based on faecal egg count (FEC), packed cell volume (PCV), weight, FAMACHA© score, and body condition score. In the second birth season, the efficacy of anthelmintics was reduced to 40%, 86% and 89% for the C, PR, and TR groups, respectively, compared with 60%, 74%, and 98%, respectively, in the first birth season (n = 106). SI and TX lambs had lower (p = 0.008) FEC than DO. The PR and TR groups had higher weight gain (p < 0.001), higher PCV (p = 0.009), and twice the anthelmintic efficacy compared with C. Humidity affected (p = 0.016) the number of infective larvae recovered per kg of dry pasture matterL3/kg DM in pasture. These findings demonstrate that the beneficial effects of worm replacement in ewes on anthelmintic efficacy and animal performance were temporary, persisting into the second generation of lambs, but diminishing over time. The sustainability of this strategy depends on climatic conditions, sheep breed resistance, and integration with broader parasite control programs. MenosAnthelmintic resistance in Haemonchus contortus compromises parasite control and productivity in tropical sheep production systems. This study monitored the second generation of lambs following the H. contortus replacement. A multidrug-resistant H. contortus population was replaced by a susceptible isolate in periparturient ewes of the White Dorper (DO), Santa Inês (SI), and Texel (TX) breeds. They were kept in a nematode-free paddock (TR, n = 60) or in a paddock naturally infested with resistant helminths (PR, n = 60), and compared with untreated ewes harbouring resistant helminths from natural infection and kept in a naturally infested paddock (C, n = 60). The 121 lambs born in the second breeding season were phenotyped every 21 days based on faecal egg count (FEC), packed cell volume (PCV), weight, FAMACHA© score, and body condition score. In the second birth season, the efficacy of anthelmintics was reduced to 40%, 86% and 89% for the C, PR, and TR groups, respectively, compared with 60%, 74%, and 98%, respectively, in the first birth season (n = 106). SI and TX lambs had lower (p = 0.008) FEC than DO. The PR and TR groups had higher weight gain (p < 0.001), higher PCV (p = 0.009), and twice the anthelmintic efficacy compared with C. Humidity affected (p = 0.016) the number of infective larvae recovered per kg of dry pasture matterL3/kg DM in pasture. These findings demonstrate that the beneficial effects of worm replacement in ewes on anthelmintic efficacy and animal pe... Mostrar Tudo |
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Thesagro: |
Anti-Helmíntico; Controle Integrado; Cordeiro; Haemonchus Contortus; Nematóide; Ovelha; Resistência. |
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Thesaurus Nal: |
Anthelmintics; Ewes; Gastrointestinal nematodes; Haemonchus; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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001 2186113
005 2026-05-04
008 2026 bl uuuu u00u1 u #d
022 $a2405-9390
024 7 $ahttps://doi.org/10.1016/j.vprsr.2026.101481$2DOI
100 1 $aBELLO, H. J. S.
245 $aMonitoring the second generation of lambs after Haemonchus contortus replacement in ewes$beffects of climate, sheep breed, and integrated control strategies in the tropics.$h[electronic resource]
260 $c2026
500 $aFinanciamento: FAPESP-Embrapa | FAPESP (Projeto #2021/02535-5 e #2021/11830-0).
520 $aAnthelmintic resistance in Haemonchus contortus compromises parasite control and productivity in tropical sheep production systems. This study monitored the second generation of lambs following the H. contortus replacement. A multidrug-resistant H. contortus population was replaced by a susceptible isolate in periparturient ewes of the White Dorper (DO), Santa Inês (SI), and Texel (TX) breeds. They were kept in a nematode-free paddock (TR, n = 60) or in a paddock naturally infested with resistant helminths (PR, n = 60), and compared with untreated ewes harbouring resistant helminths from natural infection and kept in a naturally infested paddock (C, n = 60). The 121 lambs born in the second breeding season were phenotyped every 21 days based on faecal egg count (FEC), packed cell volume (PCV), weight, FAMACHA© score, and body condition score. In the second birth season, the efficacy of anthelmintics was reduced to 40%, 86% and 89% for the C, PR, and TR groups, respectively, compared with 60%, 74%, and 98%, respectively, in the first birth season (n = 106). SI and TX lambs had lower (p = 0.008) FEC than DO. The PR and TR groups had higher weight gain (p < 0.001), higher PCV (p = 0.009), and twice the anthelmintic efficacy compared with C. Humidity affected (p = 0.016) the number of infective larvae recovered per kg of dry pasture matterL3/kg DM in pasture. These findings demonstrate that the beneficial effects of worm replacement in ewes on anthelmintic efficacy and animal performance were temporary, persisting into the second generation of lambs, but diminishing over time. The sustainability of this strategy depends on climatic conditions, sheep breed resistance, and integration with broader parasite control programs.
650 $aAnthelmintics
650 $aEwes
650 $aGastrointestinal nematodes
650 $aHaemonchus
650 $aSheep
650 $aAnti-Helmíntico
650 $aControle Integrado
650 $aCordeiro
650 $aHaemonchus Contortus
650 $aNematóide
650 $aOvelha
650 $aResistência
700 1 $aCOSTA, E. C. da
700 1 $aCUNHA, A. F. da
700 1 $aKAPRITCHKOFF, R. T. I.
700 1 $aCORRÊA, L. G. P.
700 1 $aNICIURA, S. C. M.
700 1 $aESTEVES, S. N.
700 1 $aSANTOS, L. A. L. dos
700 1 $aMINHO, A. P.
700 1 $aCHAGAS, A. C. de S.
773 $tVeterinary Parasitology: regional studies and reports$gv. 71, 101481, 2026.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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| Registros recuperados : 2 | |
| 1. |  | YOUNG, N. D.; JEX, A. R.; LI, B.; LIU, S.; YANG, L.; XIONG, Z.; LI, Y.; CANTACESSI, C.; HALL, R. S.; XU, X.; CHEN, F.; WU, X.; ZERLOTINI, A.; OLIVEIRA, G.; HOFMANN, A.; ZHANG, G.; FANG, X.; KANG, Y.; CAMPBELL, B. E.; LOUKAS, A.; RANGANATHAN, S.; ROLLINSON, D.; RINALDI, G.; BRINDLEY, P. J.; YANG, H.; WANG, J.; WANG, J.; GASSER, R. B. Whole-genome sequence of Schistosoma haematobium. Nature Genetics, v. 44, n. 2, p. 221-225, Feb. 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| 2. | | WIJAYAWARDENE, N. N.; HYDE, K. D.; AL-ANI, L. K. T.; TEDERSOO, L.; HAELEWATERS, D.; RAJESHKUMAR, K. C.; ZHAO, R. L; APTROOT, A.; LEONTYEV, D. V.; SAXENA, R. K.; TOKAREV, Y. S.; DAI, D. Q.; LETCHER, P. M.; STEPHENSON, S. L.; ERTZ, D.; LUMBSCH, H. T.; KUKWA, M.; ISSI, I. V.; MADRID, H.; PHILLIPS, A. J. L.; SELBMANN, L.; PFLIEGLER, W. P.; HORVÁTH, E.; BENSCH, K.; KIRK, P. M.; KOLARÍKOVÁ, K.; RAJA, H. A.; RADEK, R.; PAPP, V.; DIMA, V.; MA, J.; MALOSSO, E.; TAKAMATSU, S.; RAMBOLD, G.; GANNIBAL, P. B.; TRIEBEL, D.; GAUTAM, A. K.; AVASTHI, S.; SUETRONG, S.; TIMDAL, E.; FRYAR, S. C.; DELGADO, G.; RÉBLOVÁ, M.; DOILOM, M.; DOLATABADI, S.; PAWLOWSKA, J. Z.; HUMBER, R. A.; KODSUEB, R.; SÁNCHEZ-CASTRO, I.; GOTO, B. T.; SILVA, D. K. A.; SOUZA, F. A. de; OEHL, F.; SILVA, G. A. da; BLASZKOWSKI, J.; JOBIM, K.; MAIA, L. C.; BARBOSA, F. R.; FIUZA, P. O.; DIVAKAR, P. K.; SHENOY, B. D.; CASTAÑEDA-RUIZ, R. F.; SOMRITHIPOL, S.; LATEEF, A. A.; KARUNARATHNA, S. C.; TIBPROMMA, S.; MORTIMER, P. E.; WANASINGHE, D. N.; PHOOKAMSAK, R.; XU, J.; WANG, Y.; TIAN, F.; ALVARADO, P.; LI, D. W.; KUSAN, I.; MATOCEC, N.; MESIC, A.; TKALCEC, Z.; MAHARACHCHIKUMBURA, S. S. N.; PAPIZADEH, M.; HEREDIA, G.; WARTCHOW, F.; BAKHSHI, M.; BOEHM, E.; YOUSSEF, N.; HUSTAD, V. P.; LAWREY, J. D.; SANTIAGO, A. L. C. M. A.; BEZERRA, J. D. P.; SOUZA-MOTTA, C. M.; FIRMINO, A. L.; TIAN, Q.; HOUBRAKEN, J.; HONGSANAN, S.; TANAKA, K.; DISSANAYAKE, A. J.; MONTEIRO, J. S.; GROSSART, H. P.; SUIJA, A.; WEERAKOON, G.; ETAYO, J.; TSURYKAU, A.; VÁZQUEZ, V.; MUNGAI, P.; DAMM, U.; LI, Q. R.; ZHANG, H.; BOONMEE, S.; LU, Y. Z.; BECERRA, A. G.; KENDRICK, B.; BREARLEY, F. Q.; MOTIEJUNAITE, J.; SHARMA, B.; KHARE, R.; GAIKWAD, S.; WIJESUNDARA, D. S. A.; TANG, L. Z.; HE, M. Q.; FLAKUS, A.; RODRIGUEZ-FLAKUS, P.; ZHURBENKO, M. P.; MCKENZIE, E. H. C.; STADLER, M.; BHAT, D. J.; LIU, J. K.; RAZA, M.; JEEWON, R.; NASSONOVA, E. S.; PRIETO, M.; JAYALAL, R. G. U.; ERDOGDU, M.; YURKOV, A.; SCHNITTLER, M.; SHCHEPIN, O. N.; NOVOZHILOV, Y. K.; SILVA-FILHO, A. G. S.; GENTEKAKI, E.; LIU, P.; CAVENDER, J. C.; KANG, Y.; MOHAMMAD, S.; ZHANG, L. F.; XU, R. F.; LI, Y. M.; DAYARATHNE, M. C.; EKANAYAKA, A. H.; WEN, T. C.; DENG, C. Y.; PEREIRA, O. L.; NAVATHE, S.; HAWKSWORTH, D. L.; FAN, X. L.; DISSANAYAKE, L. S.; KUHNERT, E.; GROSSART, H. P.; THINES, M. Outline of Fungi and fungus-like taxa. Mycosphere, v. 11, n. 1, p. 1060-1456, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 2 | |
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