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用兔出血症病毒西藏株人工感染３月龄家兔，在接种后８ｈ的病理变化主要表现为肝、肾，心等实质细胞变性，坏死，内皮细胞肿胀以及其它器官充血，淤血等变化。在接种后１６ｈ全身各器官均呈现一定程度的坏死，出血以及透明血栓形成等变化。濒死期表现为全身各组织器官均受到严重损害，实质细胞广泛坏死，微血管有大量透明血栓形成，以及出血，水肿，炎性细胞浸润等特征性的败血症变化。 相似文献
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用兔出血症病毒西藏株人工感染３月龄左右家兔，分别于接种后８，１６和２０－２６ｈ扑杀，对心，肝，脾，肺、贤，脑肠，胸腺，圆小囊，骨髓等作肉眼及组织病理学观察。结果，感染后８ｈ，肝，肾，心实质细胞表现一定程度的病理损伤，其他器官均表现不同程度的充血，瘀血等变化；感染后１６ｈ，各器官的呈现不同程度的坏死，出血及透明血栓形成等病变；濒死期全身器官均受到严重损害，微血管内形成大量透明血栓以及出血，水肿，炎性 相似文献
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7日龄雏鸭经肌肉接种坦布苏病毒BZ株1周后,发病率100%,死亡率为80%。接种鸭全身多数器官出现充血、出血、坏死等症状,病理学变化主要表现在肝实质严重变性、坏死;脾淋巴细胞局部减少;肾小管上皮细胞肿胀;肺淤血,内有大量细胞渗出;胰腺中可见凝固性坏死灶;大脑软脑膜充血、水肿,小脑脑膜上炎性细胞浸润。鸭接种该病毒后,攻毒组的丙氨酸氨基转移酶、天门冬氨酸氨基转移酶、谷氨酰胺转移酶、乳酸脱氢酶水平和血清尿酸的浓度较对照组明显升高。结果表明:坦布苏病毒BZ株可造成全身多器官的病理性损伤以及主要血液生化指标的显著变化,这可能是该病毒致病性的重要机制之一。 相似文献
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一株H5N1亚型高致病力禽流感病毒人工感染鸭的组织病理学观察 总被引：2，自引：2，他引：2
鸭静脉接种或经眼-鼻-口腔-泄殖腔接种禽流感病毒A／duck／Guangdong／220／2004（H5N1）后,全身多数脏器充血、淤血、出血,血栓形成、组织水肿,以及心、肝、脾、肺、肾、胰、脑、胸腺、法氏囊等许多器官的实质细胞发生坏死或凋亡;主要表现为血管炎、坏死性胰腺炎、萎缩性坏死性胸腺炎和法氏囊炎、脾炎、气管炎、出血性支气管间质性肺炎、病毒性心肌炎、非化脓性脑炎、局灶性病毒性肝炎、溃疡性肠炎、肾小管间质性肾炎和系膜细胞增生性肾小球肾炎等。结果显示,该病毒的致病机制与细胞坏死和细胞凋亡有关,而鸭多脏器严重的病理损伤是其死亡的原因。 相似文献
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大肠埃希氏菌性腹泻仔猪各组织的超微病理学观察 总被引：1，自引：0，他引：1
大肠埃然氏菌性腹泻仔猪的病理学变化表现为全身实质器官变性、坏死；脑膜血管充血，有微血栓形成。透射电观察发现回肠微绒毛表面附着杆状、有菌毛的大肠埃希氏菌；小肠绒毛排列紊乱、极性丧失、小肠粘膜、肝及淋巴结等膜结构受损，内质网扩张，线粒体肿胀，染色质边移等，随着增大细胞逐变怀，坏死，并出现嗜酸性小体。 相似文献
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本实验用牛源性Ａ型魏氏梭菌，绿脓杆菌，弗氏柠檬酸杆菌，普通变形杆菌的培养物和冠状病毒、粘膜病毒的细胞培养物人工接种黄牛，死后进行病理检查，结果证明：接种细菌的病例，其实质器官的主质细胞发生变性和局灶性凝固性坏死等退行性病变，全身组织广泛性出血，尤以心内膜为甚，肠粘膜有局灶性坏死灶，并能从肝脏和脾脏检出魏氏梭菌。而细菌与病毒先后接种的病例，除见上述病变之外，还在实质器官及胃肠道粘膜中见有较多的淋巴细 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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观察兔烧伤合并海水浸泡后，皮肤、心、肝、脾、肺、肾组织病理学变化特点，为兔烧伤合并海水浸泡后的早期救治提供依据。新西兰兔20只，制作烧伤动物模型后，随机分为浸泡组（n=10）和对照组（不经海水浸泡组，n=10）。光镜和电镜下观察兔烧伤合并海水浸泡后，皮肤、心、肝、脾、肺、肾组织病理学变化特点，并用HPIAS-1000病理分析系统对肝细胞进行测量。结果显示，兔烧伤合并海水浸泡后，皮肤、心、肝、脾、肺、肾组织病理学变化明显比对照组严重，肝细胞体积明显小于对照组。免烧伤合并海水浸泡后重要器官的病理变化有其自身特点，比其单纯烧伤后的病理变化明显加重。 相似文献
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Jiahao Shao Jie Wang Yanhong Li Mauricio A. Elzo Tao Tang Tianfu Lai Yuan Ma Mingchuan Gan Li Wang Xianbo Jia Songjia Lai 《Journal of animal physiology and animal nutrition》2021,105(2):345-353
This study aimed to determine whether high-fat diet (HFD) could cause growth, behavioural, biochemical and morphological changes in young female rabbits. Thirty-six female rabbits were randomly divided into two groups fed with either a high-fat diet (HFD) or a standard normal diet (SND) for 5 weeks. Growth and behavioural changes were recorded during the 5-week feeding period. Tissue samples, including blood and adipose tissue, were obtained after slaughter. HFD rabbits weighed more by the end of the feeding period, had a higher percent body weight and adipose tissue weight change and had longer body and bust lengths than SND rabbits. HFD rabbits significantly reduced their feed intake and feeding frequency during the fourth and fifth weeks. HFD rabbits also showed lower frequency of drinking and resting and increased stereotypical behaviour. Besides, HFD rabbits showed significant physiological abnormalities. HFD rabbits had higher serum cholesterol (TC) and triglycerides (TG) levels than SND rabbits at the end of the feeding period, and higher free fatty acid (FFA) levels than rabbits in the SND group after the third week of feeding. Serum thyroxine (T4) increased significantly in week 2 and week 5 and triiodothyronine (T3) increased significantly in week four. However, there was no significant change in serum glucose (GLU) and insulin (INS) levels. Additionally, HFD reduced the area and diameter of perirenal and subcutaneous fat cells and increased their density. Our findings suggest that HFD rabbits had higher weight gains, accumulation of fat, and more behavioural changes than SND rabbits. Although high levels of fat in the diet had a low impact on hyperglycaemia, it could lead to hyperlipidemia and hyperthyroidism. Our results also suggest that sustained HFD may cause the proliferation of adipocytes in young female rabbits. 相似文献
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The present study evaluated the histological changes in the muscle tissue after limb lengthening in skeletally immature rabbits and assessed the effect of different lengthening rates on the regeneration and degeneration properties of striated muscle. Thirteen different lengthening protocols were applied on a total of 16 male domestic white rabbits divided into four groups. The histopathological changes were analysed by a semiquantitative method according to the scoring system of Lee et al. (1993). After evaluation of the five main degenerative parameters (muscle atrophy, internalisation of muscle nuclei, degeneration of the muscle fibre, perimysial and endomysial fibrosis, haematomas), it is evident that rabbits subjected to limb lengthening at a rate of 3.2 mm/day showed more degenerative changes than those limb-lengthened at 0.8 or 1.6 mm/day. Our study showed that the regenerative mechanisms were not endless. If the daily lengthening rate reached the 3.2 mm/day limit, the regenerating ability of the muscle decreased, and signs of degeneration increased significantly. 相似文献
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M N Santos V A Nunes I J Nunes S S Barros R H Wasserman L Krook 《The Cornell veterinarian》1976,66(4):566-589
Young rabbits on high (0.57%) or low (0.24%) calcium were given an aqueous extract of Solanum malacoxylon (S.m.) leaves (20 g dried leaves/200 ml distilled water) intragastrically at 0, 12 and 36 hours. On bothe diets S.m. induced progressive hypophosphatasemia but serum calcium and phosphorus underwent only minor changes. In rabbits necropsied at 0, 12, 36, 60, 84 and 108 hours, S.m. was shown to have a negative effect on the resorbing osteocytes. With retarded osteocytic osteolysis, osteopetrosis resulted. Further regressive changes in the osteocytes resulted in osteonecrosis which was observed within 12 hours after administration of S.m. extract. The osteonecrosis, combined with retarded apposition, later resulted in osteopenia. It was concluded that the recommended dietary calcium for growing rabbits--about 0.6%--is too high. Whereas the histologic appearance of bone in rabbits fed low calcium was normal, bones from rabbits on high calcium showed retarded resorption and the rabbits had a relative hypophosphatasemia. 相似文献
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Junko Sato Naoaki Yamada Ryosuke Kobayashi Minoru Tsuchitani Yoshiyasu Kobayashi 《Journal of toxicologic pathology》2015,28(2):73-78
We previously investigated rabbit hereditary cerebellar cortical degenerative disease, called cerebellar cortical abiotrophy in the veterinary field, and determined that the pathogenesis of this disease is the result of failed synaptogenesis between parallel fibers and Purkinje cells. In this study, longitudinal changes in the development and atrophy of the cerebellum of rabbits with hereditary abiotrophy after birth were morphometrically examined (postnatal day [PD] 15 and 42) using image analysis. Although development of the cerebellum in rabbits with abiotrophy was observed from PD 15 to PD 42, the growth rate of the cerebellum was less than that in normal rabbits. In rabbits with abiotrophy, the number of granular cells undergoing apoptosis was significantly higher at PD 15 and dramatically decreased at PD 42. The number of granular cells did not increase from PD 15 to 42. The synaptogenesis peak at PD 15 occurred when the largest number of apoptotic granular cells in rabbits with abiotrophy was observed. Although 26% to 36% of parallel fiber terminals formed synaptic junctions with Purkinje cell spines, the remainder did not at PD 15 and 42. The rate of failure of synaptogenesis in the present study might be specific to this case of abiotrophy. Morphometric analysis revealed detailed changes in development and atrophy in animals with postnatal cerebellar disease occurring soon after birth. 相似文献
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为了研究獭兔不同发育时期盲肠组织结构变化特点,总结其发育规律,采用石蜡切片、HE染色技术,对相同条件下饲养的不同生长阶段(出生后1,15,30,60d)獭兔各6只进行解剖,并在显微镜下观察其盲肠组织结构.结果发现,獭兔盲肠黏膜的单层柱状上皮细胞的高度、杯状细胞的体积都随年龄的增长而变大,半环形皱襞间的距离随着年龄的增长逐渐变小,皱襞的长度和体积也随年龄增长有所增加.此外还发现,随年龄的增长八点黑獭兔盲肠蚓突内的淋巴小结数目明显增多,黏膜下层内的淋巴小结和弥散淋巴组织随年龄增长也越来越多,黏膜皱襞变得密集. 相似文献
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将30只雄性健康新西兰白兔随机分为5组,每组6只。对照组给予基础饲料;模型组给予高脂饲料;三个大黄组给予高脂饲料同时分别用不同药量的大黄醇提液灌胃。于第10周末处死家兔,观察、测量和比较主动脉弓、胸主动脉、腹主动脉和髂动脉分支处血管脂质斑块的病理变化,计算斑块面积占胸主动脉的百分比;光镜下观察心脏冠状血管的病理改变,并计算冠状小动脉粥样硬化的发生率,研究大黄醇提液抑制家兔动脉粥样硬化形成的作用。结果显示：大黄醇提液能一定程度上抑制家兔主动脉及腹主动脉AS形成,减少AS斑块面积,降低动脉分支处AS的发生率,减轻心脏冠状动脉AS的病变。 相似文献
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K. Eatwell E. Mancinelli J. Hedley E. Keeble M. Kovalik D. A. Yool 《The Journal of small animal practice》2013,54(6):325-330
Six lop rabbits were presented with clinical signs of otitis media or externa. The presence of disease was confirmed by computerized tomography examination, with two rabbits suffering from bilateral disease. The rabbits were anaesthetized and underwent surgery of the affected bulla. Rabbits with bilateral disease had a minimum of 2 weeks between procedures. A single vertical incision was made over the base of the vertical canal, which was bluntly dissected free from surrounding tissue. The ventral portion of the vertical canal was removed and a lateral bulla osteotomy was performed. The mucosa at the base of the dorsal vertical canal was apposed and the aural cartilage sutured to form a blind‐ending pouch open at the pretragic incisure. Histopathological samples taken from the dorsal margin of the vertical canal yielded subtle and non‐specific changes in the six samples submitted. All rabbits were discharged within 48 hours of surgery. The cosmetic outcome was excellent with animals retaining visually normal aural anatomy. The partial ear canal ablation/lateral bulla osteotomy procedure is quick and has a good cosmetic result when performed in rabbits. 相似文献
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L Caron E F Flores R Weiblen C F C Scherer L F Irigoyen P M Roehe A Odeon J H Sur 《Veterinary microbiology》2002,84(4):285-295
Latent infection with bovine herpesvirus type-5 (BHV-5) was established in rabbits inoculated with two South American isolates (EVI-88 and 613) by intranasal or conjunctival routes. Nine rabbits (613, 8/27; EVI-88, 1/34) developed neurological disease and died during acute infection and other three (613, n=2; EVI-88, n=1) developed a delayed neurological disease, at days 34, 41 and 56 post-inoculation (p.i.). Between days 56 and 62 p.i., the remaining rabbits were submitted to five daily administrations of dexamethasone (Dx) to reactivate the infection. Twenty-five out of 44 rabbits (56.8%) shed virus in nasal or ocular secretions after Dx treatment. Virus shedding was first detected at day two post-Dx and lasted from one to 11 days. The highest frequencies of virus reactivation were observed in rabbits inoculated conjunctivally (10/15 versus 15/29); and among rabbits infected with isolate 613 (12/16 versus 13/28). Virus reactivation upon Dx treatment was accompanied by neurological disease in nine rabbits (20.4%), resulting in six deaths (13.6%). Virus in moderate titers and mild to moderate non-suppurative inflammatory changes in the brain characterized the neurological infection. Three other rabbits showed severe neurological signs followed by death after 31 to 54 days of Dx treatment. Virus, viral nucleic acids and inflammatory changes were detected in their brains. The late-onset neurological disease, after acute infection or Dx treatment, was probably a consequence of spontaneous virus reactivation. These results demonstrate that BHV-5 does establish a latent infection in rabbits and that clinical recrudescence may occur upon reactivation. 相似文献
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福建省肉兔体内猪瘟抗体水平的检测 总被引：2，自引：2，他引：2
以猪瘟正向间接血凝法对福建省内11个兔场、32群肉兔进行猪瘟抗体水平检测,检测肉免3321只,待检血清541份。结果表明:群体中半数以上待检血清抗体效价达到1∶4的群体有13个,占总群体数的40.6%;群体中半数以上待检血清抗体效价达到1∶8的群体有4个,占总群体数的12.5%;而抗体效价达到1:8的待检血清有62份,占总待检血清数的11.5%。其中有3个群体的部分待检兔血清猪瘟抗体效价达到1∶16和1∶32。表明本地区部分肉兔在饲养过程中,确实感染过HDV。 相似文献