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| Peña-Espinoza, Miguel; Valente, Angela H.; Thamsborg, Stig M.; Simonsen, Henrik T.; Boas, Ulrik; Enemark, Heidi L.; López-Muñoz, Rodrigo; Williams, Andrew R.. |
| Increasing drug resistance in gastrointestinal (GI) parasites of livestock and concerns about chemical residues in animal products and the environment are driving the development of alternative control strategies that are less reliant on the use of synthetic drugs. An increasingly investigated approach is the use of bioactive forages with antiparasitic properties as part of the animal’s diet (nutraceuticals) or as potential sources of novel, natural parasiticides. Chicory (Cichorium intybus) is a multi-purpose crop and one of the most promising bioactive forages in temperate regions, and numerous in vivo trials have explored its potential against parasitic nematodes in livestock. However, it is unclear whether chicory can induce a direct and broad activity... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Dairy cattle; Beef cattle; Sheep and goats; Health and welfare; Pigs. |
| Ano: 2018 |
URL: http://orgprints.org/33736/1/Pe%C3%B1a-Espinoza%20et%20al%202018.pdf |
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| Peña-Espinoza, Miguel. |
| Parasitism with gastrointestinal (GI) nematodes is ubiquitous in grazing cattle and its control is critical to sustain satisfactory levels of animal health, welfare and productivity. Currently, conventional parasite control strategies relying exclusively on anthelmintic drugs are severely threatened by the development of anthelmintic resistance (AR) in bovine nematodes in several countries. In Denmark, cattle farmers and their veterinarians depend largely on macrocyclic lactones (ML), mainly ivermectin (IVM), for nematode control. However, no studies have evaluated the field efficacy of IVM against GI nematodes in Danish cattle. Alternative control approaches to minimize selection for AR and that can complement the use of the still effective anthelmintics... |
| Tipo: Thesis |
Palavras-chave: Production systems; Dairy cattle; Beef cattle; Feeding and growth; Health and welfare. |
| Ano: 2016 |
URL: http://orgprints.org/30837/1/M%20Pe%C3%B1a-Espinoza_PhD%20thesis%20%28secured%29.pdf |
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| Peña-Espinoza, Miguel; Thamsborg, Stig Milan; Desrues, Olivier; Hansen, T. V. A.; Enemark, Heidi L.. |
| Two experiments studied the effects of dietary chicory against gastrointestinal nematodes in cattle. In Experiment (Exp.) 1, stabled calves were fed chicory silage (CHI1; n = 9) or ryegrass/clover hay (CTL1; n = 6) with balanced protein/energy intakes between groups. After 16 days, all calves received 10 000 Ostertagia ostertagi and 66 000 Cooperia oncophora third-stage larvae (L3) [day (D) 0 post-infection (p.i.)]. In Exp. 2, calves were assigned to pure chicory (CHI2; n=10) or ryegrass/clover (CTL2; n = 10) pastures. After 7 days, animals received 20 000 O. ostertagi L3/calf (D0 p.i.) and were moved regularly preventing pasture-borne infections. Due to poor regrowth of the chicory pasture, CHI2 was supplemented with chicory silage. At D40 p.i. (Exp. 1)... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Farming Systems; Health and welfare. |
| Ano: 2016 |
URL: http://orgprints.org/30116/1/Pe%C3%B1a-Espinoza%20et%20al%202016_Parasitology.pdf |
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| Peña-Espinoza, Miguel; Desrues, Olivier; Hansen, Tina; Thamsborg, Stig M.; Enemark, Heidi L.. |
| Objectives: Studies were conducted to test the potential use of chicory against gastrointestinal nematode infections in cattle. Methods: In study 1, fifteen 2-4 months-old dairy calves were allocated into a chicory (CHI, n=9) or control (CTL, n=6) group. CHI and CTL were stabled and fed with chicory silage or hay, resp., ad lib for 56 days. Protein/energy intakes were equalized between groups throughout the study. After 14 days on the diet all calves were infected with 10,000 Ostertagia ostertagi and 66,000 Cooperia oncophora third-stage (L3) larvae. In study 2, twenty 4-6 months-old dairy calves grazed a second-year, pure chicory sward (CHI, n=10) or a ryegrass/white clover pasture (CTL, n=10) for 43 days. After 7 days on the diet all calves were infected... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Health and welfare. |
| Ano: 2015 |
URL: http://orgprints.org/29396/1/Pe%C3%B1a-Espinoza%20et%20al_in%20vivo_WAAVP2015.pdf |
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