固肠促长散对实验性脾虚仔猪实质器官的组织学影响（英文）

[目的]观察固肠促长散对脾虚仔猪腹泻各实质器官的修复情况。[方法]选取12头健康仔猪为试验组,对其颈部肌肉注射利血平注射液0.5 ml,每天1次,连用10 d。之后将试验仔猪平均分为2组。对固肠促长散组的6头仔猪,将6 g药物用20 ml开水冲泡后,灌服,每天1次,连续灌服7 d;对脾虚对照组的6头仔猪,每天灌注生理盐水20 ml,连续7d。于停药后的第2和第8天,各组分别取3头猪,后颈动脉放血处死。分别制作心脏、肝脏、肾脏、肺脏的石蜡切片并染色,观察各实质器官的组织学变化。[结果]用固肠促长散治疗的腹泻脾虚仔猪,各实质器官的组织学结构修复接近正常。[结论]固肠促长散在仔猪腹泻上起到了较好的治疗作用。     

An unusual case of a mature teratoma on the left perineal region of a young cat: surgical treatment and pathological description

A 10-month-old intact male cat with a clinical history of a large mass in the left perineal region was submitted to the surgery department. The mass had reportedly been present as a small swelling after birth. Cytological evaluation using a fine-needle aspirate showed eosinophilic keratinaceous debris, and was not convincing for the definitive diagnosis. Complete surgical excision was performed. Postoperative function and aesthetics were excellent. Based on gross and histological features the definitive diagnosis of the tumor was mature teratoma with ectodermal and endodermal components. After a follow-up period of 4 months, no signs of recurrence were evident. Surgical excision of the teratoma in our case was considered curative. A perineal location has not been previously reported in the cat and should be considered a rare condition in this species.     

人体组织学与解剖学课程建设与改革

人体组织学与解剖学是生命科学中重要的基础课程和主干课程。该文在认真分析传统教学模式及教学手段的基础上,结合笔者自身的教学经验,针对教学中存在的内容繁杂、概念抽象、教学手段陈旧及学生积极性不高等问题,提出了建设性建议,为促进该课程的建设与改革提供参考。     

显微数码互动系统在动物组织学实验教学中的应用

显微数码互动系统将现代信息技术融进了动物组织学实验教学的全过程,克服了传统教学模式的局限性,充分实现了教师与学生之间的图像共享,提高了动物组织学实验课的教学质量,为动物组织学实验教学的发展开创了一个新的教学模式。     

Gingival stippling in dogs: Clinical and structural characteristics

Diagnosis of periodontal disease, a frequent disorder in dogs, rests mainly upon the assessment of changes affecting the gingiva. Loss of gingival stippling, one of the early symptoms of periodontal disease in the human, could also indicate early periodontitis in the dog.The aim of this study was to determine the presence of gingival stippling in dogs, its location on alveolar processes, its association with age and inflammation, and its relation to the microstructure of the gingiva. The study concerns clinical, scanning electron and light microscopic examination of the gingiva of 48 dogs.Stippling, i.e. the granular appearance of the gingiva resembling irregularly distributed crater-like depressions of varying sizes, was present in adult but absent in young and senescent dogs. Stippling was most prominent at the level of the canine and the carnassial teeth. In contrast to the human gingiva, depressions and elevations of the stippled gingiva of the dog were not distributed uniformly. Presence of stippling indicates the presence of well developed mucosal layers and extensive interdigitation of epithelial rete pegs and papillary layer. Interaction of inelastic collagen fibres and a high hyaluronan content within papillary layer resulting in a high turgor of tissue due to the extensive water binding capacity of hyaluronic acid could also play a role in shaping of the gingival surface.The significance of gingival stippling in the diagnosis of periodontal disease in dogs is limited, as stippling occurs in healthy but also slightly inflamed attached gingiva of adult individuals.     

Metabolic and histological parameters of silver catfish (Rhamdia quelen) exposed to commercial formulation of 2,4-dichlorophenoxiacetic acid (2,4-D) herbicide

The objective of this study was to investigate the effects of commercial formulation of herbicide 2,4-D on metabolic parameters, acetylcholinesterase (AChE) activity and liver histological evaluation of silver catfish (Rhamdia quelen) exposed for 96 h. AChE activity increased in brain (600 and 700 mg L⁻¹) and decreased in all concentrations tested in muscle tissue. Hepatic glycogen was reduced after 2,4-D exposure ranging from 47.67% (400 mg L⁻¹) until 59.3% (700 mg L⁻¹). Hepatic tissue showed lactate reduction at all 2,4-D concentrations tested and glucose was reduced only at 700 mg L⁻¹. In the highest concentration tested hepatic glycogen and glucose reduced instead plasma glucose levels increased. White muscle tissue showed glycogen reduction in fingerlings exposed to all herbicide concentrations and glucose reduction at 700 mg L⁻¹. Muscle lactate levels increase at all 2,4-D concentrations tested. Vacuolation of hepatocytes and changes in its arrangement cords were observed by histologic analysis in group treated with 700 mg/L of 2,4-D. These results suggest that silver catfish exposed to concentrations of 2,4-D near of CL₅₀ showed metabolic and histological response to compensate some stress caused by herbicide exposure. Taken together parameters measured can be used as biomarkers to monitor herbicide contaminated water.     

口虾蛄促雄腺的形态结构研究

[目的]对口虾蛄的形态结构进行观察。[方法]利用组织切片技术观察雄性口虾蛄(Oratosquilla oratoria)促雄腺的形态结构特征。[结果]口虾蛄促雄腺1对,乳白色,呈椭圆形,分别位于第三步足的交接肢基部内侧,包埋于肌肉、肝胰腺之间,通过组织膜附着在输精管表面。腺体发育分为3个时期:增殖期、合成期和分泌期。腺体的分泌方式为全浆式。[结论]该研究结果可为丰富口虾蛄繁殖生物学的研究提供基础资料。     

Evaluation of the Integrity of Horse Hoof Dermal and Epidermal Tissues Collected by Dorsal Transmural Access

The purpose of this study was to evaluate the integrity of dermal and epidermal tissues collected by dorsal transmural access. Eight healthy adult horses were subjected to two biopsies of the right hoof, with a 24-hour interval. To ensure hoof integrity, a radiographic evaluation with dorsopalmar and lateromedial positions was performed. The animals were sedated, and the pedal tissue was collected from two sites that were 2 cm distal to the coronary band. For each biopsy, the hoof wall was perforated using an aluminum oxide drill bit, 4.8 mm in diameter that was connected to a drilling machine, yielding a hole of approximately 9.0 mm. The perforation procedure was performed slowly in the stratum medium until 1 mm of it remained, which was determined by evaluating the movement in response to pressure applied with a Halstead forceps. Laminar deep incisions were performed with a number 11 scalpel blade until the distal phalanx was reached. The laminar tissue was then removed using a Frahm scaler. A cuboid laminar sample measuring approximately 5 mm at the base and 7 mm in height was obtained. The samples were suitable for analysis by histology and transmission electron microscopy showing that the ends of the secondary epidermal laminae were round, the basement membrane was intact between the secondary epidermal laminae and secondary dermal laminae, and the ultrastructural analysis of the cells showed their structural integrity.     

绵羊心壁组织学结构特征的研究

分别制作绵羊左、右心房,左、右心室石蜡组织切片,通过HE、改良PTAH染色法研究绵羊心壁的组织结构特征。结果发现绵羊心壁由心内膜、心肌膜和心外膜构成,心内膜中富含浦肯野纤维;心肌膜最厚,心肌纤维较细,呈螺旋状环绕分层排列;心外膜内可见大量脂肪细胞。改良PTAH染色将肌纤维染成紫蓝色,闰盘着色深蓝,纤维结缔组织染成玫瑰红色。研究结果表明,绵羊心肌纤维较细,肌纤维横纹清晰,闰盘较稀疏。H2O2因其氧化和漂白作用,在改良PTAH染色中有一定的作用。