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用ALV-J gp85单克隆抗体证明蛋鸡存在J亚群禽白血病 总被引：20，自引：1，他引：20
采用免疫组化法，对病理学初步诊断为蛋用型鸡J亚群白血病的自然发病鸡的肿瘤、骨髓、肝脏、脾脏、肾脏、肺脏、心脏、胰脏、输卵管、卵巢、腺胃、骨骼肌、大脑、坐骨神经，用特异性抗J亚群禽白血病病毒(ALV—J)囊膜糖蛋白gp85的单克隆抗体进行检测，待检的组织切片中均检出阳性抗原，免疫组化的研究结果与病理学诊断结果相一致。在国内外首次发现并报道蛋用型鸡J亚群禽白血病的自然病例。 相似文献
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间接荧光抗体法快速诊断海兰褐蛋鸡J亚群禽白血病的研究 总被引：19，自引：2，他引：17
某地区海兰褐蛋鸡发生肿瘤性传染病，经临床症状和病理学检查，在肝、脾、肾、卵巢、输卵管、肺、骨髓、腺胃、肠道等可见胞浆内充满球形嗜酸性颗粒的骨髓瘤细胞，呈灶状或弥漫性的分布。该变化是禽骨髓细胞瘤病病理学的特征性变化，具有证病意义。经用特异性抗J亚群白血病病毒囊膜蛋白gp85的单克隆抗体的免疫组化方法，在病料组织切片上检出病毒抗原，从而确诊为蛋鸡J亚群禽白血病。本研究是尝试用间接荧光抗体法来快速诊断该病。采用特异性抗J亚群禽白血病病毒囊膜蛋白gp85单克隆对组织触片作间接荧光抗体试验，检测J亚群禽白血病病毒抗原。在骨髓、食管、肌肉、输卵管、肾都出现了范围广而且很明亮的荧光；肝、肺、脾的荥光较为明亮；心脏的荧光较弱，但清晰可见。表明在病料组织中存在特异性病毒抗原。 相似文献
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《黑龙江畜牧兽医》2017,(14)
为了解沈阳地区不同品系鸡群禽白血病(AL)流行情况,于2015年7月份—2016年6月份采集了沈阳市5个县(区)28家规模化鸡场72个不同品种、不同代次、不同日龄鸡群的泄殖腔棉拭子1 896份、翅静脉血液4 656份,对采集的样品分别进行了禽白血病病毒(ALV)p27抗原和血清中禽白血病病毒J亚群(ALV-J)抗体的检测。结果表明:沈阳地区不同品种鸡群中存在不同程度的ALV-J亚群感染,平均阳性率为3.39%,p27抗原阳性率平均为5.70%;且肉鸡品种的J亚群抗体阳性率(4.50%)高于蛋鸡品种(2.05%),肉鸡品种的p27抗原阳性率(7.37%)高于蛋鸡品种(3.10%);产蛋初期的鸡群p27抗原阳性率(9.97%)和J亚群抗体阳性率(5.56%)高于其他生长阶段。 相似文献
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宁夏肉用种鸡J亚群禽白血病的实验室诊断 总被引：3，自引：0，他引：3
对宁夏某肉用种鸡场发病的肉种鸡病料进行组织病理学检查，并将其接种于鸡胚成纤维细胞(cEF)，从中分离到J亚群禽白血病病毒(ALV—J)。从患鸡肝组织切片中观察到大量髓细胞样瘤细胞，散在或呈簇状，髓细胞样瘤细胞的细胞质内显现嗜酸性颗粒。在用抗ALV—J囊膜糖蛋白的单克隆抗体进行的间接荧光抗体(IFA)试验中．病料接种cEF后的IFA试验呈现强阳性。用一对ALV—J特异性的引物对病料基因组DNA进行PcR扩增，结果，扩增出了2．2kb的特异性条带。上述观察和试验证实，该肉用种鸡场肉种鸡发生的疫病为J亚群禽白血病。 相似文献
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我国禽白血病病毒生物学特点及其控制 总被引：4，自引：0，他引：4
综述了我国流行的禽白血病病毒（ALV）,总结了J亚群禽白血病病毒的流行病学、临床症状、组织病理学和病毒生物学特性,并阐述了ALV-J常用的分离鉴定方法,提出了控制和根除ALV的方法。 相似文献
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IMC10200株ALV-J实验诱发禽骨髓性白血病的研究 总被引：2，自引：0，他引：2
对分离自肉种鸡群亚临床感染的J亚群禽白血病病毒IMC1o200株进行了实验感染诱发禽骨髓性白血病的病理学研究.IMC10200株J亚群禽白血病病毒尿囊腔接种11日龄肉鸡胚和SPF蛋鸡胚,孵出后跟踪观察.9周龄时随机抽检感染鸡,感染肉鸡特异引物PCR检测全部为阳性;组织病理学观察感染鸡无明显病变.至21周龄时感染肉鸡出现第一例典型骨髓性白血病病例;感染SPF蛋鸡未见明显J亚群禽白血病相关病变. 相似文献
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本次诊断报告通过以下方法对一起肉仔鸡暴发急性J亚群禽白血病(avian leukemia,AL)进行了诊断:流行病学观察肩关节肿瘤结节,临床剖检肝脏、心肌和肠管及关节部位有肿瘤结节;病理切片镜检肝脏组织萎缩、心脏有发育均匀一致的髓样细胞瘤;用J亚群禽白血病抗体检测试剂盒检测15份血清样品,结果均为阳性;血清样品和泄殖腔棉拭子p27抗原检测,结果均为阳性;病死鸡内脏样品和关节液荧光PCR检测,结果禽白血病病毒(avian leukemia virus,ALV)核酸为阳性,普通PCR检测,结果为J亚群禽白血病阳性。综上所述,本次疫情确诊为急性J亚群禽白血病。为该病的临床诊断和防控提供有益的借鉴。 相似文献
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蛋鸡中发现J亚群白血病与网状内皮增生症自然混合感染 总被引：12，自引：3，他引：12
发病蛋鸡经组织学、免疫组化检测确诊为J亚群白血病与网状内皮增生症混合感染。与人工接种病例不同的是，在肿瘤组织内还发现一种特殊的细胞——淋巴-巨噬细胞；在骨髓和肿瘤组织中检测到部分髓细胞胞浆内有ALV—J抗原表达。从发病情况、各器官病变程度及免疫组化结果来看，2种病原存在明显的相互协同作用，脾可能是网状内皮增生症的原发器官。但其发病的时间可能不如J亚群白血病早。此次在蛋种鸡发现此混合感染提示，病毒在环境选择压及免疫选择压的作用下，其生物特性、致病作用以及宿主范围均可发生改变。应警惕J亚群白血病和网状内皮增生症混合感染在蛋鸡中的大面积暴发。 相似文献
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不同地区海兰褐蛋鸡中J亚群-禽白血病病毒株gp85基因的分子演化分析 总被引：1，自引：0，他引：1
本研究通过对不同地区海兰褐蛋鸡群中分离的5株J亚群-禽白血病病毒(ALV-J)的囊膜糖蛋白基因(gp85)进行同源性分析,阐述了不同海兰褐鸡群中存在的ALV-J的分子演化规律。对2008-2009年分别从北京、陕西、山东泰安、济阳、曲阜等不同地区饲养的海兰褐鸡分离到的5株ALV-J,用PCR方法克隆gp85基因、测序,并与国内外已发表的14株ALV-Jgp85基因进行同源性比较。结果表明,5株ALV-J与来自白羽肉鸡的HPRS-103株的同源性最近,平均为96.6%(96.4%～96.8%);与来自国内海兰灰蛋鸡的SD07LK1株的同源性平均仅为89.6%(89.3%～89.9%);而5株ALV-J间的同源性高达98.1%以上(98.1%～100%)。本研究发现,不同地区的海兰褐蛋鸡中广泛存在的ALV-J可能有一个共同的来源,即国外的白羽肉鸡。 相似文献
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The direct administration of either 103 or 108 cells of Salmonella enteritidis phage type 4 on to the conjunctiva of laying hens resulted in systemic infection. The bacterium was isolated from a variety of tissues, including the ovary and oviduct, and it was excreted in faeces for at least 27 days after infection. 相似文献
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The effects of two lathyrogens (beta-aminopropionitrile and semicarbazide) on the reproductive system of the laying hen were compared by measuring the changes in the ovary and oviduct associated with a diminished egg production rate. The laying hens were fed diets containing either beta-aminopropionitrile, the toxic constituent of certain legume seeds in the genus Lathyrus or semicarbazide to induce lathyrogenic effects in which reduced egg production was one of the toxic effects. The gross examination of the reproductive system of the hens revealed that ovarian activity was greatly impaired. The reduced egg production after feeding beta-aminopropionitrile was due to the reduced growth rate of the ovary, and in the case of semicarbazide, to the atresia of large yolky follicles. 相似文献
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本试验选用正在产蛋和休产的来航鸡,用放射配体结合分析法,分别测定两组鸡的肝脏和输卵管胞浆和胞核受体含量。胞浆液的蛋白含量用考马斯亮蓝G250法测定;胞核DNA含量用紫外吸收法测定。试验结果表明:两组鸡的肝脏和输卵管的胞浆雌激素受体含量均无明显差异;两组鸡的肝脏和输卵管的胞核雌激素受体含量,产蛋鸡肝脏的胞核雌激素受体是休产鸡的15倍,差异显著(P<0.05),而输卵管的胞核雌激素受体差异不明显。 相似文献
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表现腺胃炎的蛋用型鸡J亚群-白血病病毒的分离与鉴定 总被引：2，自引：1，他引：1
从表现腺胃炎的尼克珊瑚粉商品代蛋鸡中分离到J亚群-白血病病毒(ALV-J)。将病料或鸡白细胞接种于CEF,培养12 d,分别采用单克隆抗体间接免疫荧光试验检测,结果10只鸡中有9只鸡分离到ALV-J,其中有4只鸡还存在与禽网状内皮增生病病毒(REV)的共感染。通过PCR扩增gp85基因,与已发表的20株ALV-J进行同源性比较。结果表明,与来自白羽肉鸡的HPRS103的同源性为97.8%,而与来自蛋用型鸡的SD07LK1株的同源性为93.0%。本研究发现,在某些仅仅发生腺胃炎的鸡也可能普遍存在ALV-J感染,再次显示了腺胃炎病料中病毒感染的多样性。ALV-J可能成为致腺胃炎的病原之一,但其致病作用有待进一步研究。 相似文献
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Yukinori YOSHIMURA 《Animal Science Journal》2004,75(3):183-191
The current paper describes aspects of local immunity in the ovary and oviduct, and the significance of immunity to reproductive functions in hens. The immunocompetent cell populations in the ovary and oviduct change with a positive correlation to sexual activity, and gonadal steroid is one of the key factors in the increase. Local immune responses mediated by major histocompatibility complex class II and T cell subsets occur in response to infection by Salmonella enteritidis, which may contaminate eggs. In the ovary, immunocompetent cells are also suggested to play roles in the regulation of ovarian functions. Macrophages and T cells are likely to enhance the regression of atretic follicles to maintain the ovarian tissue microenvironment. Autoantibodies to ovarian tissues appeared in the hens with low egg laying frequency, suggesting that the auto‐antibodies may be one of the factors in the decline of egg production. In the oviduct, local immunity possibly has a role in the selection of sperm, though the immunoreactions may also affect sperm survival leading to the decline in fertility. The concentration of yolk IgY, which plays a role in maternal immunity transmission, significantly decreases with the aging of birds, whereas it is significantly increased by estrogen. Therefore, the immune system plays significant roles not only in defense against infection, but also in the functions of reproductive organs. Investigations on the local immune system in the reproductive organs and factors affecting it are of importance for the production of sterile eggs and improvement of reproductive functions. 相似文献
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1. An experiment was performed to investigate the weight of the ovary, the oviduct, the pituitary gland, the plasma concentrations of luteinising hormone (LH), progesterone, oestradiol and the responsiveness of the pituitary gland in vitro to doses of Luteinising Hormone-Releasing Hormone (LH-RH) ranging from 10(-10) to 10(-5) M in laying (L), incubating (I) and out-of-lay (OL) turkey hens. 2. Pituitary weights did not differ between the groups but the weights of the ovary and oviduct and the plasma concentrations of progesterone and oestradiol were lower in I and OL than in L hens. The plasma concentrations of LH were lower in I than in L hens. 3. In vitro, the basal release of LH was similar in L and I hens, but significantly higher in OL hens. A slow and linear increase in basal LH release by the glands from I and OL hens was observed throughout the experiment. 4. No clear dose-response relationship was found in any of the reproductive states with respect to LH release in vitro following LH-RH stimulation, probably as a result of partial cell desensitisation. On the other hand, the amount of LH released over basal level in responses to stimulation with different doses of LH-RH were not significantly different between L and I hens, but they were between 5- to 10-fold higher in OL hens, except at the lowest dose. 5. These findings confirm that there is no correlation between circulating LH in turkey hens and the capacity of the hypophysis to release LH in vitro passively or in response to LH-RH. Therefore, the low circulating concentrations of LH in I and OL turkey hens cannot be accounted for by decreased adenohypophyseal responsiveness to LH-RH. They may indicate a low level of hypothalamic secretion of LH-RH and/or to the existence of an inhibitory mechanism on LH secretion in vivo in both OL and I hens. 相似文献
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BC Li W Li H Chen YN Zhang ZT Zhang XY Wang B Gao TC Dou KH Wang 《Reproduction in domestic animals》2013,48(3):368-372
This study was conducted to explore the influencing factors of ova in vitro fertilization (IVF) and transfer of the fertilized ova into the oviduct of recipient hens. The efficiency of fertilization was compared using three aspects: (i) the different time of ova collection and transfer, (ii) egg‐laying period of recipient hen; and (iii) semen volume. The following results are observed: 72%, 40% and 0% of ova were found in ovarian sac in 30～40 min, 50～60 min and more than 90 min post‐oviposition, respectively; 20%, 18%, 14% and 5.8% of ova were fertilized with 0.1, 0.2, 0.5 and 1.0 ml semen, respectively; and 33% and 100% of healthy chickens were hatched from fertile ova with 0.1 and 0.5 ml of semen, respectively. All oocytes obtained from ovary and mid‐oviduct were unfertilized. Embryos were transferred into recipient hens 30 min ± 10 min post‐oviposition, and 70% of shelled eggs were produced. There were no eggs produced in the other transfer times. This demonstrated that live chicken can be obtained by IVF of ova collected shortly after oviposition. It was important that the ovum was transferred into the oviduct infundibulum of recipient hens immediately or shortly after oviposition. 相似文献
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1. The concentrations of 17 beta-oestradiol (E2) and progesterone (P) were determined in the plasma of layer breeder hens at the end of their first laying season, in relation to neoplasms of the oviduct, including magnum tumours and leiomyomas. 2. The plasma concentration of E2 was higher in tumorous than in non-tumorous hens indicating it may be involved in the development of oviduct tumours. 3. The plasma concentrations of P in tumorous and non-tumorous hens were not significantly different, suggesting no active role of P in the aetiology of the tumours. 4. The E2: P ratio was higher in tumorous than in non-tumorous hens. This ratio could be of value in predicting hens at risk of developing oviduct tumours. 相似文献
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能量对蛋鸡卵巢促卵泡素受体mRNA表达及产蛋率的影响 总被引：1，自引：0，他引：1
为了探讨不同日粮能量水平对蛋鸡性成熟过程中卵巢促卵泡素受体(FSHR)mRNA表达及产蛋率的影响,试验选取360只体莺相近的8周龄海兰褐壳蛋鸡,采用单因素随机试验,随机分为5个组,每个组4个重复,每重复18只鸡.在蛋鸡采食其他营养成分相同的情况下,配制不同梯度的能量饲料,采用相对定量反转录-聚合酶链反应方法,测定蛋鸡性成熟过程中卵巢FSHR mRNA表达量.结果表明:高能组卵巢FSHR mRNA的表达量呈先升后降的趋势;对照组、低能组随周龄的增加鸡卵巢FSHR mRNA表达量逐渐增加.14周龄,低能Ⅱ组卵巢FSHR mRNA表达量显著低于其他4组(P<0.05);18周龄,对照组鸡卵巢FSHR mRNA表达量显著高于低能Ⅱ组(P<0.05),除对照组外的其他4组间差异不显著(P>0.05);22周龄,对照组与高能Ⅱ组和低能Ⅰ组间没有差异(P>0.05),却显著高于高能Ⅰ组和低能Ⅱ组(P<0.05).鸡22周龄卵巢FSHR mRNA表达量与22、28周龄产蛋率呈极显著正相关(P<0.01),与35周龄产蛋率呈显著正相关(P<0.05),而与46周龄产蛋率无显著相关(P>0.05).结果提示,适当的能量水平可以提高FSHR mRNA的表达,进而提高产蛋率. 相似文献