Malignant Mixed Sex Cord-stromal Tumour in a Stallion     

A Zanghì  G Catone  G Marino  G De Vico  PA Nicòtina 《Reproduction in domestic animals》2004,39(5):376-379

A 30-year-old Standardbred stallion was examined for unilateral scrotal swelling. Physical and ultrasound examinations revealed a painless enlarged left testis with a non-homogeneous echogenicity, when compared with the controlateral testis. The stallion underwent left unilateral orchiectomy. Grossly, the excised testis was irregularly enlarged (12 x 9 x 9 cm; weight: 530 g) and firm. The sections showed that testicular parenchyma was replaced by a lobulated, greyish-white mass, which involved the epididymal head. At microscopy, a dual Leydig and Sertoli cell tumour component could be seen. Neoplastic Sertoli cells were prevalent and presented pleomorphic cells, mitotic figures and occasional vascular invasion. Tumour patterns showed tubular and solid areas, cord-like or diffuse in appearance, among which newly formed Leydig cell nests and low-density fibrillar bundles were interposed. Immunohistochemically, a weak to moderate immunostaining for vimentin, AE(1)/AE(3) cytokeratin, alpha-1-antitrypsin and CD99 antigens was found in the growing Sertoli cells, whose nuclear MIB-1 labelling index scored 13 +/- 2%. The Leydig tumour cells, on the other hand, displayed a moderate to strong positivity for alpha-inhibin, vimentin, AE(1)/AE(3) cytokeratin, neurone-specific enolase and CD99. On the basis of these findings, a diagnosis of malignant mixed sex cord-stromal tumour was made.  相似文献   

Xylazine-induced mydriasis: possible involvement of a central postsynaptic regulation of parasympathetic tone     

W. H. HSU  D. M. BETTS  P. LEE 《Journal of veterinary pharmacology and therapeutics》1981,4(3):209-214

Intravenous injection of xylazine (0.01 – 1 mg/kg) produced a dose-dependent mydriasis associated with a depression of tonic ciliary nerve activity in anesthetized cats. Xylazine-induced mydriasis was apparent in the sympathectomized iris but was absent in the parasympathectomized, physostigmine-treated iris. Epinephrine (30 μg/kg, i.v.) produced a slighdy greater mydriasis in the sympathectomized iris than in the parasympathectomized, physostigmine-treated iris. The α₂-adrenergic blocking agent, yohimbine (0.5 mg/kg, i.v.) antagonized the pupillary dilation and reversed the depression of ciliary nerve activity induced by xylazine administration.
In rats pretreated with reserpine (7.5 mg/kg, s.c., 20 h) and α-methyl-p-tyrosine (250 mg/kg, i.p., 5 h), intravenous injection of xylazine (0.01 – 1 mg/kg) resulted in mydriasis of similar magnitude as control animals. However, xylazine induced bradycardia in the control group but not in die pretreated animals.
The results suggest that pupillary dilation produced by i.v. xylazine is primarily die result of a central inhibition of parasympathetic tone to the iris. It also appears that xylazine produces this effect via postsynaptic α₂-adrenergic mechanisms, while it produces bradycardia through a presynaptic α₂-adrenergic mechanism.  相似文献   

Abattoir surveillance of Sarcocystis spp., Cysticercosis ovis and Echinococcus granulosus in Tasmanian slaughter sheep, 2007–2013          下载免费PDF全文

CJ Phythian  B Jackson  R Bell  L Citer  R Barwell  PA Windsor 《Australian veterinary journal》2018,96(3):62-68

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Investigation of the effect of Equivac® HeV Hendra virus vaccination on Thoroughbred racing performance          下载免费PDF全文

K Schemann  EJ Annand  PA Reid  MF Lenz  PC Thomson  NK Dhand 《Australian veterinary journal》2018,96(4):132-141

Objective

To evaluate the effect of Equivac® HeV Hendra virus vaccine on Thoroughbred racing performance.

Design

Retrospective pre‐post intervention study.

Methods

Thoroughbreds with at least one start at one of six major south‐eastern Queensland race tracks between 1 July 2012 and 31 December 2016 and with starts in the 3‐month periods before and after Hendra virus vaccinations were identified. Piecewise linear mixed models compared the trends in ‘Timeform rating’ and ‘margin to winner’ before and after initial Hendra virus vaccination. Generalised linear mixed models similarly compared the odds of ‘winning’, ‘placing’ (1st–3rd) and ‘winning any prize money’. Timeform rating trends were also compared before and after the second and subsequent vaccinations.

Results

Analysis of data from 4208 race starts by 755 horses revealed no significant difference in performance in the 3 months before versus 3 months after initial Hendra vaccination for Timeform rating (P = 0.32), ‘Margin to winner’ (P = 0.45), prize money won (P = 0.25), wins (P = 0.64) or placings (P = 0.77). Further analysis for Timeform rating for 7844 race starts by 928 horses failed to identify any significant change in Timeform rating trends before versus after the second and subsequent vaccinations (P = 0.16) or any evidence of a cumulative effect for the number of vaccines received (P = 0.22).

Conclusion

No evidence of an effect of Hendra virus vaccination on racing performance was found. The findings allow owners, trainers, industry regulators and animal health authorities to make informed decisions about vaccination.  相似文献   

Prevalence of obesity and owners’ perceptions of body condition in pleasure horses and ponies in south‐eastern Australia          下载免费PDF全文

SJ Potter  NJ Bamford  PA Harris  SR Bailey 《Australian veterinary journal》2016,94(11):427-432

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Dietary supplementation with Mannanoligosaccharides (MOS) from Bio‐Mos enhances growth parameters and digestive capacity of gilthead sea bream (Sparus aurata)     

N. GÜLTEPE  S. SALNUR  B. HOŞSU  O. HISAR 《Aquaculture Nutrition》2011,17(5):482-487

Dietary mannanoligosaccharide (MOS) from commercial product, Bio‐Mos supplementation, has been examined for its effects on weight gain and feed conversion of domestic mammals and birds, but very few studies have evaluated the responses of aquacultural species to MOS. A feeding and digestibility trial was performed to asses the potential beneficial effect of two levels of Bio‐Mos on growth, feed utilization, survival rate and nutrients’ digestion of gilthead sea bream (Sparus aurata) with an initial average weight of 170 g. Bio‐Mos was added at 2 or 4 g kg^?1 to a fish meal–based control diet, and each diet was fed to triplicate groups of 1‐year‐old gilthead sea bream. After 12 weeks, there were no differences in survival rate among fish fed experimental diets (P > 0.05). It was observed that a significant improvability existed for both growth and feed utilization in fish fed diets supplemented with Bio‐Mos (P < 0.05). Body proximate composition remained unaffected by Bio‐Mos supplementation in fish fed experimental diets (P > 0.05). Apparent digestibility values for protein, carbohydrate and energy were appreciably affected by the inclusion of two different levels of Bio‐Mos, only lipid digestibility was the exception. In conclusion, the results of this trial indicate that 2 g kg^?1 dietary supplementation with BIO‐MOS seem to be most positive for gilthead sea bream production.  相似文献   

Optic neuropathy and retinopathy in closantel toxicosis of sheep and goats     

PA GILL  RW COOK  JG BOULTON  WR KELLY  B VANSELOW  LA REDDACLIFF 《Australian veterinary journal》1999,77(4):259-261

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缓释氮肥与尿素配施对高原机插籼稻产量与生长特性的影响   总被引：2，自引：0，他引：2  

龙瑞平  朱丽芬  赵丽娟  李贵勇  夏琼梅  朱海平  帕三石  尹娇  邓安凤  杨从党 《中国稻米》2017,(4)

为了明确高原地区机插籼稻缓释氮肥与尿素配施的最佳比例,以川谷优7329为材料,在施氮量为150kg/hm~2和105 kg/hm~2水平下,研究了4种缓释氮肥与尿素配施比例(10∶0,7∶3,5∶5,3∶7)对机插籼稻产量与生长特性的影响。结果表明,不同施氮量间水稻产量差异不显著,缓释氮肥与尿素配施水稻产量由高到低为5∶510∶07∶33∶7。在相同比例下增加施氮量可以增加机插籼稻抽穗期高效叶片的长度,提高茎蘖数和抽穗期叶面积指数,但降低了氮肥农学利用效率和粒叶比。尿素所占比例越高成穗率越低,5∶5的处理水稻表观输出率和氮肥农学利用效率最高。高原地区机插籼稻最佳氮肥施用量为105 kg/hm~2,缓释氮肥与普通尿素配施比例为5∶5。  相似文献   

红壤喷洒粘着剂之防冲效果     

许中立  戴欣怡  徐弘明  陈淑慈  陈佳吟 《水土保持研究》2009,16(6)

台湾因地形、地质与气候的关系故崩塌与土壤流失颇多,加上人为过度开发与土地超限利用结果.遂造成不少土砂灾害问题.为了加速国土的复育,水土保持植生工程中常加入黏着剂除使植物种子有效的停留于坡面生长外,也有保护坡面防止土壤冲蚀的目的.研究乃以亚热带地区常见的红壤为试样,喷洒常用的3种粘着剂,并在降雨强度50,80,110 mm/h及坡度16.7°,21.8°与28.8°的情况下进行60 min试验.结果表明:高分子黏着剂较其它2种材料能保持稳定的抗冲蚀效果,压克力树脂于高强度降雨冲蚀较多,德国柏油乳剂则坡度愈陡冲蚀愈多.  相似文献   

嘉义白杞村樟树坪地层滑动之探讨     

徐弘明  许中立  戴欣怡 《水土保持研究》2009,16(6)

地滑之发生系受自然的地质构造、降雨、地下水、地震、河岸侵蚀及人为开发破坏等因素所影响.在地滑之防治上,如应用各种调查、观测以及试验研究,予以探讨引起滑动的各种原因,并探究其滑动机制后,方施以适当的防治方法抑制其再发生.或将灾害减至最低程度.研究地点位于嘉义县竹崎乡白杞村境内,因多次台风暴雨侵袭,使得浊水溪支流遭流水挟带之大量土砂冲刷边坡,致使樟树坪路下边坡紧邻溪流之坡脚淘刷严重;又因该区之地势陡峭、地质条件较差,遭逢连续降雨浸蚀坡面,遂引发大规模地滑灾害,影响往来交通与邻近民宅之安全.故针对现地进行地形测量、地质调查、水文分析与边坡安全监测,并通过边坡稳定分析,了解该区边坡稳定特性,以评估地层滑动的情形并探讨其后续影响.  相似文献