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1.
为调查安徽省五华鸡J亚群禽白血病(Avian leukosis virus subgroup J,ALV-J)的感染情况,采用ELISA对五华鸡进行P27抗原和ALV-J抗体检测.挑选5只抗原抗体阳性鸡进行PCR检测,同时将5只抗原抗体阳性鸡和5只抗原抗体阴性鸡进行剖检,制作病理切片.其中1只鸡PCR检测为阳性,能扩增出545 bp条带,PCR检测阳性的鸡其心脏有肿瘤、脾脏肿大等病理学变化;组织切片发现心脏、肝脏、脾、肾、肺等组织内有弥漫性髓细胞样瘤细胞或髓细胞瘤病灶,髓细胞样瘤细胞的细胞质内可见嗜酸性颗粒.结果表明五华鸡已经感染了ALV-J,且部分鸡个体已经发病.  相似文献   

2.
J亚型禽白血病病毒(subtype J avian leukemia virus, ALV-J)诱导的髓细胞样瘤细胞在形态上与正常髓系细胞很相似，为明确两者的形态差异和减少对禽髓细胞性白血病的误诊，对ALV-J人工感染病例和自然感染病例中的髓细胞样瘤细胞的形态特征进行了系统观察，并将其与正常鸡髓系细胞进行了鉴别和分析。结果表明，ALV-J感染鸡的血液、肝脏、脾脏和法氏囊等器官中髓细胞样瘤细胞主要是含有粗大嗜酸颗粒的中幼粒细胞和晚幼粒细胞，胞核约占细胞体积的1/2,胞核偏在、未分叶，可见病理核分裂象，其在石蜡组织切片中直径为8～10μm,在血涂片中直径12～14μm;正常幼龄鸡的肝脏、肾脏、法氏囊等器官中也有数量不等的晚幼粒细胞，这些细胞在形态上与髓细胞样瘤细胞很相似，胞浆中含有较多细小的嗜酸颗粒，但细胞体积较小，核浆比小，胞核约占细胞体积的1/3;其在石蜡组织切片中直径为5～8μm,血涂片中未见。研究结果提示，临床中应依据细胞大小、核型以及胞浆成分等特征对髓细胞样瘤细胞进行鉴别，同时应结合病毒核酸检测结果来确诊J亚型禽白血病。  相似文献   

3.
对山东济南某蛋鸡养殖场送检的5只发病鸡,通过PCR方法进行实验室诊断并进行病理组织学分析。结果发现,病鸡肝、脾、肾等组织器官显著肿大并有灰白色肿瘤结节,瘤细胞为髓样细胞;取病死鸡的肝脏、肺脏提取DNA样本,从中扩增出ALV-J亚群特异性的病毒核酸。上述检测结果判定该病例为髓细胞瘤型禽J亚型白血病。取病鸡内脏器官进行常规石蜡切片,HE染色,镜下观察发现肿瘤组织主要由髓样瘤细胞组成,心、肾、肝等可见髓样瘤细胞浸润。  相似文献   

4.
淋巴细胞性J亚群禽白血病病理学观察   总被引：4，自引：0，他引：4  
本研究旨在探讨日益复杂和多样的J亚群禽白血病的肿瘤病理表现.在流行病学调查基础上,对广东省4个集约型清远麻鸡种鸡场的禽白血病病原进行了分离鉴定和PCR检测,确诊其病原为禽白血病毒J亚群(ALV-J).通过病理组织学研究发现,这些鸡场ALV-J的主要病理表现为淋巴细胞性肿瘤(82.9％),其次为血管瘤型肿瘤(11.4％),髓细胞性肿瘤仅为5.7％.淋巴细胞性肿瘤主要出现在内脏实质器官,肝脏、脾脏、肾脏、肺脏、腺胃和胰腺等器官明显肿胀,实质中可见大小不一的灰白色肿瘤结节,切面均质柔软.肿瘤的实质主要由典型的成淋巴细胞和淋巴样瘤细胞构成,病理性核分裂像多见.研究结果证实,清远麻鸡出现了一种新的J亚群禽白血病表现形式,即淋巴细胞性J亚群禽白血病,在国内外尚属首次报道.  相似文献   

5.
为探究J亚群禽白血病病毒（Avian leukosis virus subgroup J,ALV-J）对鸡脾脏巨噬细胞天然免疫反应的影响,试验利用密度梯度离心法和贴壁法,从鸡脾脏组织中分离得到单核细胞,并通过显微镜观察培养至24 h、72 h、120 h单核细胞的分化过程;通过PCR扩增ALV-J特异性引物H5/H7,验证脾脏巨噬细胞对ALV-J的易感情况;同时,通过qPCR验证感染ALV-J后鸡原代脾脏巨噬细胞中炎性因子、干扰素及肿瘤抑制因子的表达。结果显示：单核细胞分化至第120 h形成形态正常的巨噬细胞,通过流式细胞技术检测鸡巨噬细胞表面特异性标记蛋白发现,84.9%的细胞为KUL01阳性细胞;鸡原代脾脏巨噬细胞对ALV-J易感,并且ALV-J可整合进鸡原代脾脏巨噬细胞基因组中;对感染ALV-J的鸡脾脏巨噬细胞进行形态观察,发现ALV-J感染导致鸡脾脏巨噬细胞形态逐渐萎缩直至死亡;ALV-J感染6 h、12 h、24 h及48 h可诱导鸡原代脾脏巨噬细胞炎性因子（IL-1β、IL-6）的表达显著上调,在ALV-J感染24 h、48 h诱导肿瘤抑制因子（TNF-α）的表达显著上调（...  相似文献   

6.
J亚型禽白血病病毒的分离与鉴定   总被引：1，自引：0，他引：1  
本研究分别从广西的地方肉鸡及河北、辽宁的蛋鸡中分离到了3株禽白血病病毒.剖检疑似发病鸡只.采集病变的肝脏、脾脏组织,经过RT-PCR检测确定为ALV感染.将病变组织接种CEF细胞,连续传代2次,将细胞上清接种DF-1细胞,p27抗原检测为阳性.同时提取病毒基因组,用H5/ADI和H5/H7两对特异性引物进行PCR扩增,结果3株为ALV-J亚型.进一步设计ALV-J亚型gp85特异性引物进行PCR扩增并测序.结果确认分离到的3株病毒为ALV-J亚型.其gp85序列与标准毒株HPRS-103同源性为96%.同时,用p27单抗进行间接免疫荧光试验,测定毒力.综上所述,我们从广西地方肉鸡巾分离到1株J亚型禽白血病病毒,从河北及辽宁的蛋鸡中分离到2株J亚型禽白血病病毒.  相似文献   

7.
J亚群禽白血病多发性肿瘤的病理改变与PCR检测   总被引：1，自引：0，他引：1  
两个规模化商品蛋鸡场发病鸡群临床解剖显示:脚部和翅膀有血管瘤、肌肉组织内出现纤维肉瘤,肿大的肝、脾出现髓细胞瘤;经组织病理学观察符合J亚群禽白血病(ALV-J)的病理学特征。针对ALV-J保守序列P27基因设计特异引物,建立PCR方法,从出现病理改变的各组织脏器、各多发性肿瘤中以及血液中均检测到ALV-J,证实该病为以髓细胞瘤、血管瘤和纤维肉瘤为主的多发性肿瘤传染病。对扩增产物序列进行测定后,与原型株序列进行比较,核苷酸同源性为98.27%,从分子水平上证明为J亚群禽白血病,用PCR检测进一步验证J亚群禽白血病毒的感染机制和引起鸡群的病理改变。  相似文献   

8.
鸡J亚群禽白血病病毒与七种常见病毒混合感染的调查   总被引：1，自引：0，他引：1  
应用PCR方法对2009年6月到2009年9月来自不同地区、不同品种、不同日龄的45个疑似感染J亚群禽白血病病毒(ALV-J)的病鸡病料进行检测,同时对ALV-J与新城疫病毒(NDV)、传染性支气管炎病毒(IBV)、传染性法氏囊病病毒(IBDV)、H9N2亚型禽流感病毒(H9N2 AIV)、包涵体肝炎病毒(IB-HV)、鸡传染性贫血病毒(CIAV)和呼肠病毒(REOV)等病毒的混合感染情况进行了调查。结果表明,采用ALV-J的特异性引物H5/H7,在45份送检病料中,有3份检出ALV-J,阳性率为6.67%。绝大多数病例检测出内源性禽白血病病毒,部分病例检测有其他7种病毒中的一种或几种。混合感染病例中以IBHV和IBV混合感染的比率较高,其中ALV-J与H9N2亚型AIV混合感染多见。  相似文献   

9.
为研究蛋鸡多发性肿瘤的病因,本实验对病鸡肿瘤组织进行病毒分离、培养及PCR检测,均扩增出针对J亚群禽白血病病毒(ALV-J)gp85基因序列的阳性条带;组织病理学观察显示发病鸡呈现髓细胞瘤、血管瘤以及纤维肉瘤等多发性肿瘤的病理变化;肿瘤细胞通过血液转移、浸润,在肝和脾组织形成局灶性或弥漫性肿瘤病灶。免疫组化染色显示肿瘤组织内,部分肿瘤细胞呈现阳性反应,表明只有部分肿瘤细胞存在ALV-J感染,而大部分肿瘤细胞检测结果呈阴性。这些病毒检测为阴性的肿瘤细胞可能是正常细胞转化为肿瘤细胞大量克隆化增殖的结果。  相似文献   

10.
山东不同品系蛋鸡禽白血病流行病学调查   总被引：4，自引：1，他引：3  
为了解山东不同品系蛋鸡白血病流行情况,作者采集了山东各地区主要引进品系及地方品种鸡的血清3882份、棉拭子2428份和疑似病例41例,对采集样品分别进行了血清学、病理学及病原学检测.结果表明:包括祖代鸡在内的各品系蛋鸡群P27抗原阳性率为19.36%;ALV-A/B亚型抗体阳性率9.29%、ALV-J亚型抗体阳性率5.18%、REV抗体阳性率13.77%;发病鸡群主要是商品鸡群和父母代鸡群,海兰褐祖代鸡群也有发病;病理学诊断证明肿瘤类型主要为髓细胞瘤(27/41)、血管瘤或血管内皮细胞瘤(7/41)、纤维肉瘤(2/41)、平滑肌肉瘤(2/41)及马立克氏病(5/41);PCR检测结果显示,41份病料中有33份为ALV-J阳性(80.49%);22份为MDV阳性(53.66%);两者共感染率高达43.9%;从疑似病例分离到的17株ALV-J病毒gp85基因的同源性为94.0%～100%,与ALV-J原型株HPRS-103 gp85基因同源性为94.3%～98.7%;与其它已发表的分离毒株ALV-J gp85基因的同源性较低(84.4%～96.8%).调查结果表明,目前山东各品系蛋鸡群均存在ALV感染,其中以ALV-J为主,ALV-A和ALV-B同时存在,且存在与MDV、REV的混合感染,病鸡主要表现髓细胞瘤和血管瘤.  相似文献   

11.
An 8-month-old PML/RARalpha knock-in female mouse developed a promyelocytic-like myeloid leukemia with an expected latency. At necropsy, besides the typical findings associated with myeloid leukemia, a severe unilateral hydronephrosis was observed. By histopathologic examination, 2 polypoid adenomas arising from the transitional epithelium of the renal pelvis and ureter were detected. The epithelial cells of the polypoid adenomas showed accumulation of hyaline eosinophilic material within the cytoplasm. Large amounts of extracellular eosinophilic crystals were also associated with the transitional cell adenomas. Immunohistochemical analysis revealed that the eosinophilic intracytoplasmic material and the extracellular eosinophilic crystals were composed of Ym proteins. A unilateral hyaline droplet tubular nephropathy was associated with the myeloid leukemia. Expression of Ym proteins characterized both the neoplastic myeloid infiltrates and the tubular hyaline droplets. In the present PML/RARalpha knock-in female mouse, the accumulation of Ym proteins associated with the myeloid leukemia and with the polypoid adenomas of the transitional epithelium underlies 2 distinct pathogenetic mechanisms.  相似文献   

12.
A case of chronic granulocytic leukemia was diagnosed in a ten year old miniature poodle and was observed for four and one half years. Methods of diagnosis and characteristic features are described. A persistent granulocytosis with a preponderance of mature forms and the absence of a detectable underlying pyogenic process were key diagnostic features which enabled distinction of this neoplastic process from acute granylocytic leukemia and a leukemoid reaction. Other features included dysplastic granulocytes in various developmental stages, marginal anemia and hyperplastic bone marrow (myeloid elements). No blast crisis occurred. This dog was euthanatized in August 1975.  相似文献   

13.
An acute myeloblastic leukemia was found in a 3.5-year-old Holstein cow. The neoplasm was characterized by massive tumor growths, and there were multiple tumor nodules in the dermis or subcutis and a large tumor mass in the mediastinum. This tumor showed negative reactivity for CD3, CD79a, major histocompatibility complex class II and myeloid/histiocyte antigen. Ultrastructural features such as dispersed cytoplasmic granules and poorly developed organelles were compatible with those of early promyelocytes.  相似文献   

14.
Acute myeloid leukemia is an uncommon hematopoietic neoplasm of dogs that should be differentiated from lymphoid neoplasms, such as lymphoma, because of different treatment protocols and a worse prognosis. Thoracic radiography is performed frequently in dogs with suspected hematopoietic neoplasia, and detecting a mediastinal mass often prioritizes lymphoma as the most likely diagnosis. However, we have observed a mediastinal mass in several dogs with acute myeloid leukemia and hypothesized that (1) the frequency of a mediastinal mass was higher and (2) the size of the mass was larger in dogs with acute myeloid leukemia compared to dogs with lymphoid neoplasms. In this analytical study (observational, retrospective, and cross‐sectional), the sample population included 238 dogs with hematopoietic neoplasia. These dogs were divided into lymphoid (large cell lymphoma, acute lymphoblastic leukemia) and myeloid groups based on standard phenotyping tests. A mediastinal mass was detected during thoracic radiography in 73/218 (33%) and nine of 20 (45%) dogs in the lymphoid and myeloid groups (P = 0.21), respectively. The median size ratio of mediastinal mass to cardiac silhouette was 0.20 and 0.23 in the lymphoid and myeloid groups (P = 0.96), respectively. Additionally, we observed normal thoracic radiographs in 111/218 (51%) dogs in the lymphoid group and nine of 20 (45%) dogs in the myeloid group. In conclusion, acute myeloid leukemia should be considered when a mediastinal mass is detected during radiography in dogs with suspected hematopoietic neoplasia—but the presence or size of a mediastinal mass does not differentiate between myeloid and lymphoid neoplasms.  相似文献   

15.
Twenty-two congenitally athymic nude (rnu/rnu) rats were transplanted with large granular lymphocyte leukemia derived from F344 rats and then compared with ten similar rats inoculated with a suspension of normal F344 rat spleen cells. The normal spleen cells and tumor cells from a spontaneous, naturally occurring leukemia did not grow or cause clinical disease in any of the rats. All rats inoculated with a serially passaged leukemia cell inoculum had local growth at the inoculation site that spread widely and resulted in progressive tumor growth. Death occurred between 16 and 38 days after inoculation. The 22 rats that received passaged tumor cells developed leukemia and splenomegaly. Spleens were diffusely infiltrated by tumor cells and had severe depletion of lymphocytes in the white pulp. Leukemic rats were thrombocytopenic and had hemolytic anemia characterized by increased osmotic fragility, red cell width, and many nucleated erythrocytes. The disease syndrome appears similar to that of F344 rats transplanted with the same inoculum. Because the host rats lacked T cells, it is concluded that the hemolytic anemia and thrombocytopenia that develop in transplanted rats are independent of T cell function.  相似文献   

16.
A diagnosis of acute myeloid leukemia was made in a 10-month-old Holstein female calf. The leukemia was macroscopically characterized by great enlargement of the spleen and moderate enlargement of some lymph nodes. Histochemical and immunohistochemical examination disclosed the presence of neoplastic cells either containing metachromatic and tryptase-positive granules or expressing factor VIII-related antigen. The granules, which were positive for naphthol AS-D chloroacetate esterase and did not have particulate contents, were distinct from those of basophilic leukemia cells. This leukemia was thought to be derived from a common myeloid progenitor capable of giving rise to megakaryocyte-erythrocyte progenitors and granulocyte-monocyte progenitors with the ability to differentiate into mast cells.  相似文献   

17.
An 18-year-old female alpaca was presented to the Colorado State University Veterinary Teaching Hospital for chronic ill thrift over a 1-year period. Six weeks previously, an infected left mandibular cheek tooth was removed by oral extraction. On physical examination the patient was cachectic, lethargic, and weak. Abnormalities on the CBC included neutropenia, thrombocytosis, and severe nonregenerative, macrocytic, hypochromic anemia. Dysplastic nucleated erythrocytes and micromegakaryocytes were observed on the peripheral blood smear. Neutrophils, bands, and metamyelocytes appeared markedly toxic. Numerous blasts containing variable numbers of fine azurophilic granules were also observed. Based on their morphology, the cells were interpreted to be progranulocytes and myeloblasts, and a presumptive diagnosis of acute myeloid leukemia (AML) was made. The blast cells accounted for 60% of the nucleated cell population on bone marrow aspirates, further supporting a diagnosis of AML with multilineage dysplasia. Post mortem examination showed infiltration of the neoplastic cells into spleen, liver, kidney, and lymph nodes. Based on histologic findings, the morphologic diagnoses were disseminated myeloid neoplasia, chronic regionally extensive tooth root abscess, and membranous glomerulonephritis. The neoplastic cells were CD172a-positive on flow cytometry, chloroacetate esterase-positive by cytochemistry, and myeloperoxidase-positive by immunohistochemistry, confirming myeloid origin. To our knowledge, this is the first case of AML with multilineage dysplasia in an alpaca, with only one other case of myelodysplasia described previously in this species.  相似文献   

18.
We investigated the hematologic abnormalities and prognoses in 16 cats with myelodysplastic syndromes (MDS). Nonregenerative anemia, thrombocytopenia, and neutropenia were observed in 15, 13, and 4, respectively, of the 16 cats with MDS. Morphologic abnormalities characteristic of MDS included megaloblastoid rubricytes (9 cats), hyposegmentation of neutrophils (7 cats), nuclear abnormality of rubricytes (10 cats) and neutrophils (13 cats), and micromegakaryocytes (10 cats). Disease in these 16 cats was subclassified into refractory anemia (RA; 8 cats), RA with excess of blasts (RAEB; 5 cats), RAEB in transformation (RAEB in T; 1 cat), and chronic myelomonocytic leukemia (CMMoL; 2 cats), according to the human French-American-British (FAB) classification. In the cats in which the clinical outcome was known, 3 of 6 cats with high blast cell count MDS, including RAEB, RAEB in T, and CMMoL, developed acute myeloid leukemia, but only 1 of 8 cats with low blast cell count MDS (RA) developed acute myeloid leukemia. Based on the Dusseldorf scoring system for the prognosis of human MDS, the survival times of the cats showing high scores (> or =3 points) were significantly shorter than those of the cats with low scores (<3 points). The FAB classification and Dusseldorf scoring system were considered to be useful for predicting the prognosis of feline MDS. Furthermore, 15 of the 16 cats with MDS in this study were infected with feline leukemia virus, indicating its possible etiologic role in the pathogenesis of feline MDS.  相似文献   

19.
Cytopenia were recognized in three cats infected with feline leukemia virus. In one cat, marrow blast cells were increased in number, and a diagnosis of aleukemic leukemia was made. The disease progressed slowly for 3 1/2 months before terminating in acute myelomonocytic leukemia, recognized as a blast crisis in blood. In the other two cats, neutropenia and altered granulopoiesis in bone marrow preceded development of myeloid leukemia.  相似文献   

20.
The combination of flow cytometric scatterplot analysis and specific monoclonal antibodies was used to evaluate the lineage of cells from six dogs with proliferative disorders of bone marrow. Scatterplot analysis was used to identify mature and immature myeloid and erythroid cells. The immunophenotype of cells in the immature myeloid gate was determined by labeling cells with four monoclonal antibodies. These results were compared to results of cytologic and cytochemical evaluation. The immunophenotype of a dog with a diagnosis of myelogenous leukemia was a cluster of differentiation-18 (CD-18) positive, CD-14 negative, Thy-1 negative, and a major histocompatibility complex (MHC) class II negative. The immunophenotype of a dog with a diagnosis of myelomonocytic leukemia was CD-18 positive, CD-14 positive, Thy-1 positive, and MHC class II positive. Although this phenotype clearly differentiated myelomonocytic leukemia from myelogenous leukemia, it was similar to the immunophenotype of dogs with a diagnosis of malignant histiocytosis or hemophagocytic syndrome. The immunophenotype of two dogs with myelodysplastic syndrome was CD-18 positive and CD-14 negative. Results for Thy-1 and MHC class II were variable. As additional lineage-specific monoclonal antibodies become available, immunophenotyping should become a valuable tool for determination of the lineage of cells in canine myeloproliferative disorders.  相似文献   

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