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为了探讨矿物元素代谢对奶牛肢蹄病的影响,我们对健康奶牛和蹄病奶牛血清和蹄角质中的部分矿物元素含量进行了测定,分析了其代谢与奶牛肢蹄病发病机理之间的关系。结果表明:蹄病牛体内矿物元素代谢异常,表现为与骨骼生长发育有关的锌、锰、钙、磷含量极显著(P<0.01)降低以及钙、磷比例严重失调。 相似文献
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奶牛腐蹄病的防治 总被引:4,自引:0,他引:4
调查了一个 1 2 0头存栏的奶牛场 ,每年因疾病原因淘汰牛 1 7头 ,其中腐蹄病 5头 ,占 2 9.4%。奶牛繁殖及泌乳对自身体况依赖程度很高 ,一些疾病所导致的死亡率虽低 ,但病程延长 ,最终导致受胎率、泌乳力下降甚至丧失。奶牛肢蹄养护直接关系到牛的饲养价值。现对北方地区奶牛腐蹄病作一简单分析 :1 症状 1奶牛腐蹄病是指蹄的真皮和角质层组织发生化脓性病理过程的一种疾病 ,其特征是真皮坏死与化脓、角质溶解 ,病牛疼痛、跛行。所统计的发病牛均为成年泌乳牛的右后蹄 ,初期病后蹄不负重 ,站立时患蹄球关节以下屈曲、频频换蹄、打地或踢… 相似文献
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奶牛腐蹄病的病因及防治措施 总被引:3,自引:0,他引:3
奶牛繁殖、泌乳对自身体况依赖程度很高 ,例如奶牛肢蹄养护问题 ,似乎跛行的瘸牛与生产关系不大 ,可一旦站起、站立、行走困难 ,致使生产性能大幅度下降 ,极易失去饲养价值。笔者调查一个 12 0头存栏量的奶牛场 ,1年中由于疾病导致牛淘汰总数为 17头 ,其中因腐蹄病淘汰 5头 ,占 2 9 4 %。现就北方地区奶牛腐蹄病作一简单分析。1 症状1 1 奶牛腐蹄病是指蹄的真皮和角质层组织发生化脓性病理过程的一种疾病 ,其特征是真皮坏死与化脓、角质溶解 ,病牛疼痛、跛行。所统计的发病牛均为成年泌乳牛的右后蹄 ,病初总提起后蹄 ,不负重 ,病牛站立时… 相似文献
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2003-2005年,息县引进奶牛14头,其中有5头发生腐蹄病,经多次灌药、包扎、外科处理,收效甚微。后经用中西结合疗法痊愈。1病因奶牛腐蹄病多发生在炎热季节,其特异病原菌为厌氧丝杆菌和节状梭形菌,直接诱因是地面结构和卫生条件差,造成蹄球损伤,蹄角质过长,蹄冠周围有污染物附着。此外,粪尿、泥泞等均可诱发本病。2临床症状奶牛腐蹄病最初发生于蹄间裂的后部,逐渐向前扩展至蹄冠部,向后扩延至蹄球,以致整个蹄部间隙腐烂。病初患肢跛行,随即病变加剧并侵害深部组织,出现严重跛行。蹄间皮肤局部红肿,充满黄液及坏死组织,表面溃疡并有恶臭味。初… 相似文献
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《养殖与饲料.饲料世界》2017,(2)
为掌握石河子地区规模奶牛场奶牛腐蹄病发病情况及其致病因素,从2013年2月-2015年4月,对石河子地区12家规模奶牛场饲喂的5 659头成年奶牛进行了腐蹄病的调查。结果发现腐蹄病平均发病率10.00%;每年的3-5月发病率最高,占全年腐蹄病发病牛数的50.71%;腐蹄病患牛平均延迟受孕期约为77 d,多使用冷冻细管平均为4.41个;腐蹄病奶牛的乳汁乳脂率、总固形物、非乳脂固体变化差异极显著(P0.01);病牛血清Fe、Cu含量较健康牛显著降低,二者差异极显著(P0.01)。 相似文献
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Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引:1,自引:0,他引:1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
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Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
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嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.…… 相似文献
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Observations on the Pathology of the Spleen of the Cat 总被引:1,自引:0,他引:1
Abstract— Lesions were found in the spleen of four of sixty-three cats examined post mortem in the department, and comprised two examples of lymphosarcoma, one of chronic fibrinous peritonitis and one of subcapsular haematoma. Abnormalities were found in two cat spleens received from veterinary surgeons in general practice. In one cat the abnormalities were an haemangiosarcoma with secondary deposits in the liver and in the other extensive mast cell infiltration. In addition lesions were detected in the spleen of three of eighty-seven cats examined post mortem in general practice. The lesions were: multiple secondary deposits of adenocarcinoma from a primary tumour of the mammary gland, a ruptured spleen and a foreign body below the splenic capsule. Résumé— L'examen microscopique de soixante-trois chats pratiqué dans le service a permis de rencontrer quatre fois des lésions de la rate, dont deux lymphosarcomes, une péritonite capsulaire fibrineuse et un hématome sous-capsulaire. D'autre part des lésions ont été trouvées dans deux rates de chat expédiées par des vétérinaires exerçant en pratiaue générale. Chez un chat il s'agissait d'un htmangiosarcome avec métastases hépatiques et chex l'autre d'une infilt ation diffuse par des mastocyta. De plus, on a rencontré des llésions dnas la rate de trois chats parmi quatre-vingt sept autopsies effectuées dans le cadre d'une clientèle génárale. Ces iésions étaient dés métastases multiples d'un adénocarcinome dont la tumeur primitive siègeait dam la glande mammaire, une rupture de la rate et un corps érangers sou capsulaire. Zusammenfassung— Läsionen der Milz wurden bei vier von dreiuiidsechzig in dieser hbteilung sezierten Katzen gefunden, und zwar in zwei Fällen ein Lymphosarkom, in einem Falle eine chron-ische fibrinöse Peritonitis und in einem ein subkapsuläres Hématom. Anomalien fanden sich auch in der Milz von zwei Katzen, die aus der tierxrztlichen Praxis eingesandt wurden. Bei der einen Katze war dies ein Hämangiosarkom mit Metastasen in der Leber, bei der anderen eine weitläufige Infiltration der Mastzellen. Außerdem wurden bei drei von siebenundachtzig in der Praxis sezierten Katzen Milzläsionen gefunden. Diese bestanden am multiplen Metastasen eines Adenokarzinoms der Brustdrüse, einer Milzzerreissung und einem Fremdkörper unterhalb der Milzkapsel. 相似文献