Ergovaline does not alter the severity of ryegrass staggers induced by lolitrem B
| العنوان: | Ergovaline does not alter the severity of ryegrass staggers induced by lolitrem B |
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| المؤلفون: | BL Sutherland, C. van Koten, JB Vlaming, Wade J. Mace, Sarah C. Finch, LR Fletcher |
| المصدر: | New Zealand Veterinary Journal. 66:93-97 |
| بيانات النشر: | Informa UK Limited, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0106 biological sciences, Perennial plant, 040301 veterinary sciences, Sheep Diseases, Severity of Illness Index, 01 natural sciences, Lolium perenne, Endophyte, Indole Alkaloids, Ergovaline, 0403 veterinary science, Animal science, Tremor, Grazing, Endophytes, Lolium, Animals, Cultivar, Lolitrem B, Proportional Hazards Models, Sheep, General Veterinary, biology, Incidence, 04 agricultural and veterinary sciences, General Medicine, Mycotoxins, biology.organism_classification, Animal Feed, Ergotamines, New Zealand, 010606 plant biology & botany |
| الوصف: | To investigate a possible interaction between lolitrem B and ergovaline by comparing the incidence and severity of ryegrass staggers in sheep grazing ryegrass (Lolium perenne) containing lolitrem B or ryegrass containing both lolitrem B and ergovaline.Ninety lambs, aged approximately 6 months, were grazed on plots of perennial ryegrass infected with either AR98 endophyte (containing lolitrem B), standard endophyte (containing lolitrem B and ergovaline) or no endophyte, for up to 42 days from 2 February 2010. Ten lambs were grazed on three replicate plots per cultivar. Herbage samples were collected for alkaloid analysis and lambs were scored for ryegrass staggers (scores from 0-5) weekly during the study. Any animal which was scored ≥4 was removed from the study.Concentrations of lolitrem B did not differ between AR98 and standard endophyte-infected pastures during the study period (p=0.26), and ergovaline was present only in standard endophyte pastures. Ryegrass staggers was observed in sheep grazing both the AR98 and standard endophyte plots, with median scores increasing in the third week of the study. Prior to the end of the 42-day grazing period, 22 and 17 animals were removed from the standard endophyte and AR98 plots, respectively, because their staggers scores were ≥4. The cumulative probability of lambs having scores ≥4 did not differ between animals grazing the two pasture types (p=0.41).There was no evidence for ergovaline increasing the severity of ryegrass staggers induced by lolitrem B. In situations where the severity of ryegrass staggers appears to be greater than that predicted on the basis of concentrations of lolitrem B, the presence of other tremorgenic alkaloids should be investigated. |
| تدمد: | 1176-0710 0048-0169 |
| DOI: | 10.1080/00480169.2017.1416693 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6276a225a0b97fc82cd18eefb8be82a2 https://doi.org/10.1080/00480169.2017.1416693 |
| رقم الانضمام: | edsair.doi.dedup.....6276a225a0b97fc82cd18eefb8be82a2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 11760710 00480169 |
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| DOI: | 10.1080/00480169.2017.1416693 |