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通过对海狸鼠生殖器官的位置、形态、解剖结构特点的系统详细地观察及大小重量的测定，结果表明：海狸鼠生殖器官的构造与其它哺乳动物基本相似，雄性海狸鼠的精囊腺、前列腺、尿道球腺３种腺体均成对存在，但其中的精囊腺特别发达，腺体的自然长度为７０２ｃｍ±０．４７ｃｍ（ｎ＝１４），重为５３３ｇ±０７９ｇ（ｎ＝８）；值得提出的是雌性海狸鼠的子宫为长筒状双子宫颈的双子宫类型，即两子宫各自独立地开口于阴道，没有尿生殖道。公母海狸鼠肛门腺均发达。 相似文献
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<正>1 诊疗情况1995年5月21日上午某海狸鼠养殖专业户饲养的4只仔海狸鼠突然发病,体软瘫痪,全身无力,来我站就诊.主诉母海狸鼠今年3岁,曾产两窝仔海狸鼠全部死亡.于5月19日7时20分又安全生产仔海狸鼠5只.5月20日下午4时发现1只仔海狸鼠死亡,死因不明,尸僵不全.5月21日上午另外4只仔海狸鼠横卧瘫痪,全身柔软,无力爬行,前来我站就诊.2 临床诊断 相似文献
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<正>一、消化特点与饲养依据(一)海狸鼠的消化器官与消化特点海狸鼠是半水栖草食动物,大部分时间在水中活动,地上行动笨拙,水中则自如,其消化器官的结构及其生理特点,都是与草食性相适应的.门齿十分发达,其外层覆盖着坚硬的珐琅质,由于齿髓终生产生,促使门齿不断生长,因此被磨损的齿端能够得到补尝.发达的门齿适于啃咬植物的根、茎、叶.臼齿适于咀嚼食物并将其磨成细末. 相似文献
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<正>冒寒是胃受阴寒所引起的一种疾病.胃寒者脾胃俱寒,在治疗上多从脾胃着手,效果较好.一、病例例一:1993年1月4日,平李村养殖户饲养的两只海狸鼠来站就诊.主诉:近几天气温骤降,海狸鼠槽内的饲料已冻结成块,连续3天后发现两只海狸鼠出现显著减食症状,曾用复方敌菌净、土霉素粉、Vc、食母生、酵母粉等治疗均无效.检查两只海狸鼠均精神不振,耳鼻及四肢俱冷,粪便稀薄,口色如绵,口津清利,不嗅,诊为海狸鼠胃寒不食症. 相似文献
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海狸鼠传染性鼻炎的诊疗孟昭聚（山东省蓬莱市潮水镇兽医站，２６５６１７）发病情况某饲养户共养海狸鼠３４只，其中成年海狸鼠１５只，仔海狸鼠１９只。自１９９４年８月９日发现有３只仔海狸鼠打喷嚏、咳嗽，之后发病海狸鼠逐渐增多，到８月１９日有１１只仔海狸鼠发病... 相似文献
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随着海狸鼠饲养业的兴起,海狸鼠的各种饲料添加剂也相继问世.目前多数养殖户是借用养貂的方法用土霉素作为海狸鼠的饲料添加剂.实践表明,长期应用土霉素作为该种动物的饲料添加剂不仅增重效果不明显,而且容易产生抗药性.为此我们研制了两种海狸鼠用保健素作为饲料添加剂,以期达到既增重,又防病的目的.现将试验情况报告如下. 相似文献
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有饲养价值的毛皮动物海狸鼠 总被引：1，自引：0，他引：1
<正> 海狸鼠又称狸獭、沼狸、河狸鼠等,属于哺乳纲、啮齿目、海狸鼠科、海狸鼠属动物,有三个亚种。是一种半水栖、体型较大的珍贵毛皮动物。近几年来,随着海狸鼠饲养业的发展,引起世界各国毛皮动物饲养业的高度重视,一些国家已先后培育出金黄色、黑色、白色等各种海狸鼠,其发展迅速,数量较多。我国于1956年开始引种饲 相似文献
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Zhang W Nasu T Hosaka YZ Yasuda M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(4):405-411
The distribution and population of immunocompetent cells in bovine hemal node, mesenteric lymph node and spleen were analyzed comparatively by immunohistochemistry and flow cytometry. Many CD8(+) cells, CD172a(+) cells and γδ T cells were found in the lymphatic cord along the sinus of the hemal node and the splenic red pulp. A few CD8(+) cells and γδ T cells were distributed diffusely in the paracortex and medullary cord of the mesenteric lymph node. Many germinal centers were recognized in the lymphatic regions such as the cortex and white pulp of these lymphoid organs. The populations of CD8(+) cells and γδ T cells in the hemal node and the spleen were higher than those of the mesenteric lymph node. In addition, the populations of CD21(+) cells and MHC class II(+) cells in the hemal node and the mesenteric lymph node were higher than those of the spleen. The results suggest that the hemal node has an important role in both cellular and humoral immunity as well as the lymph node and the spleen in cattle. 相似文献
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A. Goupil C. Bolliger C. Lapointe A. Morency C. Girard 《The Journal of small animal practice》2012,53(11):664-667
A 5·5‐year‐old male castrated Bernese mountain dog presented with respiratory difficulties and was diagnosed with haemorrhagic pericardial effusion which transformed into chylopericardium. Thoracic duct ligation and subtotal pericardiectomy in combination with biopsy of an enlarged tracheobronchial lymph node were performed. Multiple clusters of mesothelial cell emboli were observed in the subcapsular sinus of the lymph node. No causative agent for the pericardial effusion could be identified, suggesting that this is a case of mesothelial cell embolisation associated with idiopathic ‐chylopericardium in a dog. 相似文献
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Four horses treated for ocular squamous cell carcinoma (SCC) that subsequently developed local tumour extension or local metastases without ocular recurrence are included in this study. Medical records were examined and long‐term follow‐up obtained through contact with owners and referring veterinarians. In 2 horses, SCC developed in the nasolacrimal duct and maxillary sinus one and 3.5 years, respectively, after treatment for SCC in the medial canthus of the eye. No recurrence of the SCC was noted in the ocular structures. Both were treated successfully with surgery and radiation therapy. Two additional horses had delayed metastasis of SCC to the parotid lymph node one and 2 years after excision of the ipsilateral third eyelid for SCC. No recurrence of the SCC was noted in the ocular structures. One was treated with surgery and radiation without success and one was not treated. Ocular SCC can spread to local tissues or lymph nodes without recurrence in the eye. The clinical manifestation of tumour recurrence may be delayed. Delayed local extension or local metastasis in horses after ocular SCC without recurrence in the eye itself has not been previously reported. Clinical signs of ocular squamous cell carcinoma should prompt immediate treatment and local recurrence despite successful treatment of the ocular disease is a possibility. 相似文献
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Indirect computed tomography lymphangiography with aqueous contrast for evaluation of sentinel lymph nodes in dogs with tumors of the head 
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下载免费PDF全文 Janet A. Grimes Scott A. Secrest Nicole C. Northrup Corey F. Saba Chad W. Schmiedt 《Veterinary radiology & ultrasound》2017,58(5):559-564
Sentinel lymph node evaluation is widely used in human medicine to evaluate the first lymph node(s) to which a tumor drains. Sentinel lymph node biopsy allows avoidance of extensive lymphadenectomies in cases where the sentinel lymph node is negative for metastasis, thereby reducing patient morbidity. It has been shown that regional lymph nodes are not always the sentinel lymph node, thus identification and sampling of sentinel lymph nodes allows for more accurate staging, which is critical for treatment and prognostication in dogs with cancer. The objective of this prospective, pilot study was to determine if indirect computed tomography (CT) lymphangiography with aqueous contrast agent would successfully allow identification of sentinel lymph nodes in dogs with masses on the head. Eighteen dogs underwent CT lymphangiography. The sentinel lymph node was successfully identified within 3 min of contrast injection in 16 dogs (89%). Compression of lymphatic vessels from endotracheal tube ties and/or the patient's own body weight delayed or prevented identification of sentinel lymph nodes in two dogs (11%). Computed tomography lymphangiography with aqueous contrast can be used successfully to rapidly identify sentinel lymph nodes in dogs with masses on the head. 相似文献
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Bilateral removal of the mandibular and medial retropharyngeal lymph nodes through a single ventral midline incision for staging of head and neck cancers in dogs: a description of surgical technique 下载免费PDF全文
下载免费PDF全文 Currently, there is no standard protocol for removal of regional lymph nodes for the staging of head and neck cancers in dogs. Palpation and fine needle aspiration of mandibular lymph nodes are most commonly performed for staging of head and neck cancers. Although cytology is commonly performed for staging of head and neck, cancers histopathology is required for definitive lymph node staging. When regional lymph node biopsy is performed, mandibular lymph nodes are most commonly sampled due to their accessibility. The medial retropharyngeal lymph nodes may be the most relevant draining lymph node of the head and neck, but they are not routinely sampled due to their anatomic location medial to the salivary glands. The technique described here will allow for a standardized surgical approach for the efficient removal of both mandibular and medial retropharyngeal lymph nodes for staging of head and neck tumours via a single ventral midline approach. 相似文献
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Poirier VJ Adams WM Forrest LJ Green EM Dubielzig RR Vail DM 《Journal of the American Animal Hospital Association》2006,42(6):430-434
Forty-five dogs with incompletely excised grade II mast cell tumors were treated with radiation using a cobalt 60 teletherapy unit (15 fractions of 3.2 Gy for a total of 48 Gy). Twenty-four of the dogs underwent prophylactic regional lymph node irradiation. Three (6.7%) dogs had tumor recurrence, two (4.4%) dogs developed metastasis, and 14 (31%) dogs developed a second cutaneous mast cell tumor. No difference in overall survival rate was observed between the dogs receiving and not receiving prophylactic irradiation of the regional lymph node. 相似文献
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Rick L Cowell Karen E Dorsey James H Meinkoth 《Veterinary Clinics of North America: Small Animal Practice》2003,33(1):47-67, v
Lymph node cytology is quick, easy, and rewarding. Cytologic samples of peripheral and/or internal lymph nodes may be collected by fine-needle aspiration biopsy (FNAB) or nonaspiration fine-needle biopsy techniques. In addition, imprints or scrapings may be made from lymph nodes that have been surgically removed or at necropsy. Lymph node cytology is an excellent way to evaluate a lymphadenopathy whether it is a single node enlarged, multiple nodes enlarged, or a generalized lymphadenopathy. If multiple lymph nodes are enlarged, more than one should be sampled. A lymph node away from the mouth or any site of inflammation should be aspirated as well as any lymph node close to a site of inflammation. Generally, if no lymph nodes are enlarged, lymph node cytology is not helpful. 相似文献
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Anatomy of the sinus node was studied in six camel hearts (Camelus dromedarius) with serial histologic sectioning. The sinus node in this species of animal was located 0.5 mm beneath the epicardium, near the junction between the cranial vena cava and the right atrium at the sulcus terminalis. Its shape was elongated, bent oblong with 28.25 mm length, 5.75 mm width and 5.38 mm thickness. The maximum section area was 101.66 mm2. The central artery of the node originated from the circumflexus branch of the left coronary artery and, throughout its length in the substance of the sinus node, had an internai elastic membrane. Histologically, the sinus node of this animal contained a central artery and a framework of collagen fibres, which were distributed around the central artery. The nodal cells were irregularly organized around the central artery and two types, i.e.‘p’ cells and transitional cells were present. The ‘p’ cells had a perinuclear clear zone but the transitional cells contained more myofibrils. The intercalated dises were not present. At the periphery of the sinus node there were many nerve fibres and a ganglion. The purkinje fibres were present within atrial myocardium, as well as within ventricular myocardium. The glycogen content of the sinus nodal cells was higher than that of the atrial myocardial cells. 相似文献
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Williams LE Broussard MT Johnson JL Neel J 《Journal of the American Veterinary Medical Association》2005,226(4):562-566
OBJECTIVE: To determine interclinician agreement when assessing remission of lymphoma in dogs and the association among results of clinicians' assessments via lymph node palpation, cytologic examination of fine-needle lymph node aspirates, and flow cytometry as determinants of remission. DESIGN: Prospective study. ANIMALS: 23 dogs with untreated lymphoma. PROCEDURE; Two clinicians independently measured large lymph nodes and cytologic examination and flow cytometry of cells from a mandibular or popliteal lymph node were performed 1 week prior to initiating treatment. Lymph node measurements with clinicians' remission assessments and cytologic examination were repeated at weeks 2, 3, and 5; flow cytometry was repeated at week 5. RESULTS: Significant correlation was identified between clinicians' remission assessments. Significant correlation between lymph node palpation and cytologic examination was identified at week 5, but not at weeks 2 and 3. Lymphoma was diagnosed in 16 of 23 (70%) dogs at initial evaluation by use of flow cytometry, although it was of limited use at subsequent evaluations and results were not diagnostic of lymphoma in any dog at week 5, including 1 dog in which lymphoma was diagnosed cytologically. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggested that physical examination and measurement of lymph node volume may not be sufficient for accurately determining remission, that flow cytometry alone should not be relied on as a means for diagnosis, and that cytologic examination of fine-needle lymph node aspirates should be considered as the most accurate means of determining remission status at times in which treatment modifications are considered. 相似文献
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L Carrasco F Chacón-m de Lara J Martín de las Mulas J.C Gómez-Villamandos M.A Sierra C.J Villeda P.J Wilkinson 《Research in veterinary science》1997,62(3):199
In order to determine the pathogenic mechanisms involved in lymph node haemorrhages in acute African swine fever (
), eight pigs were inoculated with
virus, strain Malawi'83. Lymph node haemorrhages were observed from three days post infection (dpi) onwards, coinciding with ASF virus replication in monocytes and macrophages adjacent to stimulated endothelial cells, phagocytic stimulation of capillary and small-vessel endothelial cells, increase in the number of fenestrations of endothelial cells, and endothelial cell loss, as well as clusters of blood cells and necrotic material beneath the endothelium. Vascular lumina were blocked by platelet plugs and fibrin microthrombi. These phenomena became more marked as the disease progressed. At five dpi, virus replication was also found in circulating neutrophils. At seven dpi, lesions were more intense and were accompanied by virus replication in sinus and capillary endothelial cells, and in other cell populations including pericytes, fibroblasts, smooth muscle fibres and reticular cells. The results obtained in this study suggest that lymph node haemorrhages are related to endothelial stimulation and the onset of disseminated intravascular coagulation. Virus replication in vessel wall cells occurs only in the final stages of the disease and plays a secondary role. 相似文献