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采用硫酸铜灌胃的方式对小鼠铜中毒的临床表现及组织器官的病理变化进行观察。结果表明,高剂量组的死亡率高于中剂量和低剂量组。高剂量小鼠组器官的病理形态学观察表现为肝脂肪变性和颗粒变性,肝细胞呈现蜂窝状外观;低剂量组和中剂量组小鼠肝细胞肿大,胞浆内充满红染的细微颗粒。低剂量组小鼠肾小管出现颗粒变性,肾小管上皮细胞肿胀,使管腔变小或狭窄,间质毛细血管扩张,充血;中剂量组小鼠肾小管出现明显颗粒变性,管腔中有许多红染蛋白质物质,出现管型。部分肾小管壁细胞结构被破坏;高剂量组小鼠肾小管上皮坏死、崩解、脱落于管腔中。结果表明,铜中毒主要损害肝脏、肾脏等组织器官,最终导致发病甚至死亡。 相似文献
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剑尾鱼硫酸铜急性中毒的病理学研究 总被引：5，自引：1，他引：4
通过对实验动物化的剑尾鱼进行急性硫酸铜中毒实验,在观察症状和剖检变化以后,对实验96h期间死亡鱼与96h后仍存活的鱼进行石蜡切片,HE染色,光学显微镜观察。主要眼观病变为肝脏水肿和白色坏死点;鳃丝肿胀,黏液分泌增多;肾脏肿胀,充血。显微病变为肝细胞水泡变性,严重坏死;鳃小片上皮细胞肿胀,脱落严重;有的鳃小片发生融合,整个鳃丝呈棒状化;肾小管上皮细胞空泡变性,间质有充血或网织细胞增多,细胞间噬铁血红素细胞增多;肝胰腺的胰腺细胞的酶原颗粒减少。 相似文献
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《畜牧兽医杂志》2019,(6)
传染性造血器官坏死病病毒(IHNV)感染是造成鲑鳟鱼类肝肾等造血组织病变坏死,组织缺血性急性死亡的重要原因,危害十分严重。为了阐明虹鳟感染IHNV发病后造血组织和血液细胞学变化规律,选择不同规格和发病程度的虹鳟进行了组织学和血液细胞学变化规律研究。结果表明:发病虹鳟肝脏组织严重贫血且水肿呈土黄色,石蜡切片,HE染色后可观察到病鱼肝脏组织大范围坏死,坏死细胞胞浆内可见嗜酸性病毒包涵体,出现不同程度的炎性细胞浸润。肾脏、肠上皮组织、心肌这些组织都发生不同程度坏死。发病鱼血细胞密度明显少于未发病鱼,而且红细胞沉降快、脆性高、比容相对较小。IHNV感染对虹鳟组织和血细胞造成了十分严重的影响。 相似文献
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《中国兽医学报》2014,(8):1314-1318
经PCR检测南京某养殖场送检的表现为多系统衰竭综合征的家养野猪病原为猪圆环病毒2型(PCV2)。采用常规石蜡切片法和免疫组织化学法对患病仔猪的病理组织学变化特点及PCV2抗原在淋巴结内的分布进行了研究。结果显示,剖检病死仔猪病变主要表现为全身淋巴结肿大和间质性肺炎。组织病理学变化主要表现为淋巴结、脾和扁桃体等免疫器官淋巴滤泡萎缩,淋巴细胞数量减少,有大量巨噬细胞浸润及多核巨细胞;非淋巴组织病变主要为肺脏呈典型的间质性肺炎,肝脏局灶性坏死及淋巴细胞浸润;肺脏和肝脏病灶内也可见少量多核巨细胞。PCV2主要分布于淋巴组织内单核巨噬细胞、支气管黏膜上皮、肺泡壁Ⅱ型上皮细胞内,肾小球内也可见少量分布。 相似文献
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为研究鼠伤寒沙门菌感染鹅的病理组织学变化,采取肌肉注射鼠伤寒沙门菌的方法,人工感染58日龄健康鹅,对试验鹅进行病理剖检,并采取心脏、肺脏、肝脏、脾脏、肾脏、脑、胰腺和肠道病料制作病理切片,观察病理组织学变化。结果可见,受感染鹅18 h内开始出现死亡,死亡率达66.7%;主要病理变化为皮下、心肌、肝脏、脾脏、肠道、脑膜等多组织器官多处充血、出血,肝脏实质肿胀,表面可见大量大小不一的雪花状坏死灶,胆囊、脾脏肿大;病理组织学变化为心脏、肝脏、脾脏、肺脏、肠道等多组织器官的细胞变性、坏死,大量红细胞及炎性细胞浸润。研究结果表明,鼠伤寒沙门菌感染鹅,致病性强、死亡率高,感染鹅可出现全身多组织器官充血、出血与组织细胞变性、坏死的急性败血症。 相似文献
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为了探究某死亡中华鲟的死亡原因,试验首先对该死亡中华鲟进行体表观察、病理解剖与临床诊断,然后通过制备组织切片和H.E.染色对该死亡中华鲟进行组织病理学观察。结果表明：该死亡中华鲟体色发黑,肛门红肿,鳃丝呈梳齿状分布且末端呈深褐色。解剖后可见肝脏充血坏死,呈深褐色;胃部严重肿大且质地较硬,胃壁较厚,内部无食物,剖开后见大量淡黄色黏液包裹的异物,经检查为循环水养殖系统中移动床内生物滤料;肾脏坏死,组织间见大量黑色血块。组织病理学观察发现,肝脏、肾脏、肠道和胃等器官内细胞间有大量炎性细胞或红细胞浸润。其中肝细胞出现凝固性坏死,细胞间脂褐素沉积,胆管受损严重,组织细胞坏死脱落;肾小球肿大且系膜增生,肾小管基底膜分离,上皮细胞松散排列,肾小管萎缩,间质纤维化增生;肠道浆膜与肌层部分脱落,肠道黏膜层柱状上皮细胞坏死脱落,肠腔内分布少量坏死脱落的肠组织细胞;胃黏膜层柱状上皮细胞与固有层分离。说明该死亡中华鲟因误食循环水养殖系统中的生物滤料导致多器官病变,最终导致死亡。 相似文献
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实验性雏鸭铜中毒症的病理学研究 总被引：23，自引：6，他引：17
选用1日龄天府肉鸭健雏210只,随机分为3组,分别喂以对照日粮(Cu12.16mg/kg)、中毒I日粮(Cu850mg/kg)和中毒II日粮(Cu1050mg/kg)7周,进行了铜中毒对雏鸭器官组织和血清酶活性影响的病理学研究。2个中毒组的病变与程度基本一致,表现为肌胃角质层增厚、龟裂;肠道充满红褐色、黑褐色或淡绿色内容物,肠黏膜肿胀潮红,黏膜上皮变性坏死,肠绒毛裸露断裂和坏死;肝细胞、肾小管上皮细胞、心肌细胞颗粒变性和空泡变性;免疫器官体积缩小、质量减轻,淋巴细胞变性、坏死及数量减少。超微结构观察,肝细胞线粒体肿胀,嵴断裂甚至溶解消失呈空泡状,胞核变形,胞浆和胞核内可见数量不等、大小不一的电子密度极高的沉积物。同时,血清谷丙转氨酶、谷草转氨酶活性显著升高(P<0.01),铜蓝蛋白活性下降。结果表明,铜中毒损害的靶器官是肝脏、肾脏、心脏、胃肠道和免疫器官。组织器官受损和功能障碍最终导致发病雏鸭死亡。 相似文献
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雏鸡实验性硒中毒的病理组织学研究 总被引：2，自引：0，他引：2
对１０日龄雏鸡实验性急性硒中毒的病理组织学变化进行了详细研究。结果表明，随着给药剂量增加，雏鸡出现急性中毒症状，病理剖检变化以胃肠道出血及心、肝、肾等器官变性、坏死及出血为主；病理组织学变化以肝、心、肾、肺、脑等器官实质细胞变性、坏死及组织内充血、出血与炎性细胞浸润为特征；超微病理变化表现为肝细胞、心肌细胞及肾小管上皮细胞核形不规则，染色体分布不均匀，线粒体肿胀、空泡化，内质网扩张。 相似文献
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Mbassa GK Kipanyula MJ Mellau LS Mwamakali ED Bulegeya FR Kauto-Mboni K 《Veterinary parasitology》2006,142(3-4):260-270
In a study of trends and magnitudes of lymphocytes proliferation, destruction or apoptosis eleven 3-month-old healthy calves were experimentally infected with the protozoan parasite Theileria parva, which is reported to cause lymphocyte proliferation. Four control calves were not infected. Infected and non-infected calves were sacrificed on days 9, 12, 16, 19, 23, 24 and 25 to examine lymphoid tissue changes and lymphocyte proliferation, apoptosis or necrosis in the thymus, spleen and lymph nodes. All infected calves developed severe East Coast fever, with enlargement of lymph nodes, dyspnoea, high fever and pulmonary oedema. Lymphocyte proliferation was not observed in lymph nodes, thymus and spleen; instead there were massive deaths of lymphocytes and other cells. The terminal severe disease caused massive lymphoid parenchyma coagulation terminating with caseation, organs and cells being undeterminable histologically. Tissues surrounding the lymph nodes were oedematous. Lymph node and thymus parenchyma were caseated and cortices and medulla indistinguishable because of severe lymphocyte and accessory cell deaths. The lymph node fibrous reticular stroma was necrotic and caseated. Lymphoid follicles in lymph nodes degenerated and lacked germinal centres. Lymph nodes, spleen and thymus were grossly enlarged, hardened, potato or cheese like, but microscopically very hypocellular and in the terminal disease acellular because of massive lymphocytes destruction. In the thymus there was extensive thymocyte and epithelioid cell necrosis and loss of distinction between cortex and medulla. The spleen white and red pulps were indistinguishable because of extensive lymphoid cell necrosis. The white pulp degenerated more than the red pulp. The massive lymphocyte deaths in the lymph nodes, thymus and spleen, without lymphocyte proliferation in this T. parva infection in calves leads to a conclusion that this parasite is lympho-destructive and lympho-degenerative in vivo rather than lympho-proliferative. 相似文献
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W. J. Hartley M.R.C.V.S. M.V.Sc. A. J. F. Gibson B.V.Sc.† 《Australian veterinary journal》1971,47(7):300-305
A mild interstitial pneumonia with mononuclear cell infiltration was produced in calves following intra-tracheal inoculation of the BIL adenovirus. Viral antigen appeared early in the regional lymph node. An interstitial reaction developed early in the lungs, and pneumonic lesions and infective virus were present by the third day after inoculation. Virus spread rapidly to trachea, tonsils and nasal mucosa, and was excreted from the third to eighth day. Upper and lower respiratory tissues continually harboured virus until the 12th day, when the experiment was terminated. The virus was isolated from the livers of two calves. All tissues yielded low concentrations of virus, and only the lung showed pathological reactions. The reactions were qualitatively similar to known adenovirus pneumonias, but considerably milder, and lacked the characteristic necrotic and proliferative bronchiolar changes. 相似文献
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EXPERIMENTAL ADENOVIRUS PNEUMONIA IN CALVES 总被引：1，自引：0，他引：1
A mild interstitial pneumonia with mononuclear cell infiltration was produced in calves following intra-tracheal inoculation of the BIL adenovirus. Viral antigen appeared early in regional lymph node. An interstitial reaction developed early in the lungs, and pneumonic lesions and infective virus were present by the third day after inoculation. Virus spread rapidly trachea, tonsils and nasal mucosa, and was creted from the third to eighth day. Upper and lower respiratory tissues continually harboured virus until the 12th day, when the experiment was terminated. The virus was isolated from the livers of two calves. All tissues yielded low concentrations of virus, and only the lung showed pathological reactions. The reactions were qualitatively similar to known adenovirus pneumonias, but considerably milder, and lacked the characteristic necrotic and proliferative bronchiolar changes. 相似文献
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A C Odeón C L Kelling D J Marshall E S Estela E J Dubovi R O Donis 《Journal of veterinary diagnostic investigation》1999,11(3):221-228
To ascertain the virulence of bovine viral diarrhea virus (BVDV) genotype II, isolate NY-93 was inoculated intranasally into 3 calves, 2 of which were treated with a synthetic glucocorticoid prior to and after virus inoculation. Anorexia, fever (up to 42 C), dyspnea, and hemorrhagic diarrhea developed 6 days after intranasal inoculation with BVDV NY-93. The condition of all calves deteriorated further until the end of the study on day 14 postinoculation. The most significant postmortem macroscopic changes in all calves were limited to the gastrointestinal tract and consisted of moderate to severe congestion of the mucosa with multifocal hemorrhages. Microscopic lesions found in the gastrointestinal tract were similar to those observed in mucosal disease, including degeneration and necrosis of crypt epithelium and necrosis of lymphoid tissue throughout the ileum, colon, and rectum. The basal stratum of the epithelium of tongue, esophagus, and rumen had scattered individual necrotic cells. Spleen and lymph nodes had lymphocytolysis and severe lymphoid depletion. Severe acute fibrinous bronchopneumonia was present in dexamethasone-treated calves. Abundant viral antigen was detected by immunohistochemistry in the squamous epithelium of tongue, esophagus, and forestomachs. BVDV antigen was prominent in cells of the media of small arteries and endothelial cells. The presence of infectious virus in tissues correlated with an absence of circulating neutralizing antibodies. These findings highlight the potential of BVDV genotype II to cause severe disease in normal and stressed cattle. 相似文献
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通过对山西黄土高原区域羊鼻蝇蛆感染情况调查和病理学研究,以明确该地区羊鼻蝇蛆的感染率和该病的病理变化。春秋两个季节对羊鼻蝇蛆感染情况进行调查,对307例绵羊进行羊头剖检,检查羊鼻蝇蛆病的各龄幼虫感染情况,同时观察病理变化,并采取感染羊的鼻黏膜、咽后淋巴结、脑和肺组织进行病理组织学检查。春季检查157例,鼻蝇蛆感染患羊34例,感染率达22%;秋季检查150例,感染患羊70例,感染率达47%;春秋两季平均感染率为34%。病理变化主要表现为:鼻黏膜出现不同损伤和增生性炎,咽后淋巴结炎性细胞浸润,有的病例出现肺气肿,脑组织水肿。免疫组织化学染色结果表明,检出虫体的羊与未检出虫体羊比较,咽后淋巴结IgA分泌细胞和IgG分泌细胞呈增高趋势,尤其是淋巴结髓质中IgA分泌细胞和IgG分泌细胞明显增多。 相似文献
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In vitro lymphocyte proliferative responses and gamma-interferon production as measures of cell-mediated immunity of cattle exposed to Pasteurella haemolytica. 总被引：1，自引：1，他引：0 
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下载免费PDF全文 B M DeBey J A Roth K A Brogden R C Cutlip M G Stevens T Jones R E Briggs J P Kluge 《Canadian journal of veterinary research》1996,60(4):263-270
Cell-mediated immune mechanisms may play a role in the pathogenesis and prevention of pneumonia in cattle caused by Pasteurella haemolytica serotype A1. To determine the circumstances required to stimulate and identify cell-mediated immune responses, calves were vaccinated with a commercial P. haemolytica bacterin or a live commercial P. haemolytica vaccine, or were infected intratracheally with virulent P. haemolytica. All calves were challenge-exposed intratracheally with P. haemolytica 31 d after vaccination or prior infection. Peripheral blood mononuclear cells and mediastinal and superficial cervical lymph node cells were stimulated with antigens prepared from P. haemolytica to evaluate in vitro proliferative responses and gamma-interferon production as measures of cell-mediated immunity. Strong proliferative responses and gamma-interferon production were detected in lymph node cells from calves vaccinated with the live vaccine and from infected calves, especially in response to stimulation with an outer membrane protein preparation from P. haemolytica. Greater proliferative responses and gamma-interferon production were associated with the lymph node nearer the site of bacterin administration (superficial cervical lymph node) or the site of infection (mediastinal lymph node), whereas greater proliferative responses and gamma-interferon production were associated with the more distant lymph node (mediastinal lymph node) in calves vaccinated with the live vaccine. Neither proliferative responses nor gamma-interferon production were detected in peripheral blood mononuclear cells from calves that were vaccinated for or infected with P. haemolytica. Antileukotoxin antibody titers were determined by a serum neutralization assay, and protection against pneumonic lesions was more closely correlated with antileukotoxin antibody responses than with lymphocyte proliferation or gamma-interferon responses. 相似文献
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Oryan A Gaur SN Moghaddar N Delavar H 《Journal of the South African Veterinary Association》1998,69(4):156-162
Calves 1-2 months old were experimentally infected with eggs of Taenia saginata and clinical and haematological deviations, development and distribution of cysticerci and pathological changes were recorded. The calves infected with 5,000, 10,000 or 50,000 eggs showed an increase in pulse and respiratory rates. The animals that received 50,000 eggs had significantly increased pulse (p < 0.05) and respiratory rates (p < 0.005). The symptoms were more severe in young, 30-day-old calves infected with 50,000 eggs. Haemoglobin concentration, haematocrit values and red blood cell count decreased, but white blood cell count increased slightly. Lymphocytes and eosinophils also increased up to 88% and 14% (p < 0.05), respectively. Most of the cysticerci were not fully formed 1 month post-infection, but at 2 months the cysts were fully mature and at 4 months, some cysts had degenerated. There was no uniform pattern of distribution of cysticerci in the body of infected calves, but the most commonly affected sites were masseter and heart muscles, followed by diaphragm, tongue and other skeletal muscles. The maximum concentration of 8-14 cysticerci per 10 g of tissue was recorded in masseter muscles and heart. The affected parts revealed tissue reactions that included pressure atrophy, necrosis and fibrosis. Microscopically, the lesions comprised infiltration with lymphocytes, plasma cells, eosinophils and macrophages, fibrosis, necrosis and calcification. The tissue reaction was severe in calves infected with 50,000 eggs. The severity of clinical signs, haematological and pathological changes depended mostly on the age of the animals and dose of infection. 相似文献
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Concurrent bovine viral diarrhoea (BVD) and systemic infectious bovine rhinotracheitis (IBR) are reported from two neonatal (11 and 15 days old) calves. The diseases occurred sporadically in a large-scale herd which may have been due to the calves' heterogeneous immunobiological status. Gross pathological and histopathological examinations revealed focal interstitial pneumonia with acidophilic intranuclear inclusions in the alveolar epithelial cells and necrotic foci in the liver with a few intranuclear inclusions in the hepatocytes. There were subserous haemorrhages in the forestomachs and intestine, necrotic changes in the rumen, enteritis, lymphocytic necrosis in the Peyer's patches, and fibrinoid necrosis in the wall of some of the neighbouring blood vessels. BVD virus was demonstrated by immunofluorescence (IF), whereas IBR virus by electron microscopy, immunofluorescence and virus isolation. 相似文献
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本研究对山东省潍坊地区8个猪场的断奶后仔猪多系统衰竭综合征(postweaning multisystemic wasting syndrome,PMWS)疑似病例在进行病原学诊断的基础上,作了系统的病理学研究,旨在为潍坊地区PMWS的诊断提供病理学诊断依据。结果表明潍坊地区PMWS病猪主要组织病理学变化表现为淋巴结和脾脏中缺少淋巴细胞,严重的单核、巨噬细胞和嗜酸性粒细胞浸润。在淋巴组织中出现类上皮样细胞以及合胞体性多核巨细胞形成的肉芽肿,巨噬细胞胞浆内有病毒包涵体。肺有间质性、支气管性肺炎;肝脏出现以肝细胞局灶性坏死、淋巴细胞浸润为特征的病变;肾脏有轻至重度的多灶性间质性肾炎;并表现不同程度的间质性心肌炎和非化脓性脑炎的病变。 相似文献
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