笼养蛋鸡骨质疏松症

笼养蛋鸡骨质疏松症又称为笼养蛋鸡疲劳症,可在高产笼养蛋鸡中观察到。本病最常发生于产蛋高峰期,有时健康的产蛋鸡突然死亡。骨质疏松症的临床症状表现为腿部虚弱无力,出现部分或全身瘫痪,不能站立,经常呆立在鸡笼的后部。病鸡通常伸着腿倒向一侧,而后出现脱水,不再产蛋。病初病鸡精神良好并能继续采食,但因为不能接近水槽或食槽,逐渐饥渴而死。1　病理变化急性死亡的鸡通常产蛋旺盛,在输卵管中有软蛋,喙软而易弯,骨质脆弱,易折断。患疲劳症的鸡,骨骼并不软或似橡胶,这一点不同于佝偻病。用剪刀很易将股骨剪断,在髓腔里找不到髓质。胸骨弯…     

笼养蛋鸡骨质疏松症的病因及防治

笼养蛋鸡骨质疏松症的病因及防治山东省胶州市畜牧局王书明，刘忠琛，刘光梅笼养蛋鸡骨质疏松症又称笼养蛋鸡瘫痪，是笼养蛋鸡特别是高产蛋鸡极易发生的一种疾病。该病１９５４年首次发现于美国南部地区，目前我国一些养鸡场也时有发生，该病能引起产蛋量下降，产蛋鸡瘫痪...     

笼养蛋鸡骨质疏松症能病因及防治

笼养蛋鸡骨质疏松又称笼养蛋鸡瘫痪，特别是高产蛋鸡极易发生的一种疾病，该病1954年首次发现于美国南部地区，目前我国一些养鸡场也时有发生。该病能引起产蛋量下降，产蛋鸡瘫痪，甚至死亡，给蛋鸡生产带来很大损失，现就其发病原因及防治办法简介如下：     

笼养蛋鸡骨质疏松症研究进展

笼养蛋鸡骨质疏松症(cage layer osteoporosis,CLO)是高产笼养蛋鸡的常见病、高发病,是危害养鸡业最为严重的骨代谢疾病之一,给养鸡业带来较大的经济损失。本文根据国内外研究报道,就该病的病因、流行病学、症状、病理发生和防治进行了综述。     

笼养蛋鸡骨质疏松症的发病原因及防治

笼养蛋鸡骨质疏松症又称笼养鸡瘫痪,是笼养蛋鸡特别是高产蛋鸡极易发生的一种疾病。该病1954年首次发现于美国南部地区。目前我国一些养鸡场也时有发生。该病能引起产蛋量下降,产蛋鸡瘫痪,甚至死亡,给蛋鸡生产带来很大损失。     

笼养蛋鸡骨质疏松症的诊治

在笼养条件下，产蛋鸡常突然瘫痪，同时产蛋量增加缓慢或下降，蛋壳品质不良，有的还会引起死亡。据笔者近几年的临诊实践，引起此种所谓产蛋鸡疲劳症的原因主要是日粮有效钙不足或钙磷比例不当包括正值产蛋期的日粮和产蛋前钙的积累、光照不足、维生素Ｄ缺乏、长期应用可结合钙质或影响其吸收的药物，或某些顽固性腹泻疾病的继发而导致钙的吸收不足等。一、临诊表现及病理变化经常在鸡群中出现瘫痪鸡只，产蛋率增加缓慢或下降，蛋壳退色，沙壳蛋或软壳蛋增加，蛋的破损率增加。发病鸡只鸡冠发白，卧于笼中影响采食，如拿出室外阳光下任…     

蛋鸡饲养技术要点

一 雏鸡选购 1外貌观察 雏鸡质量的优劣对雏鸡的成活率和生长发育有直接的影响，要认真做好雏鸡外貌观察这项工作。应选择活泼好动、反应灵敏、大小整齐的健康雏鸡。健康雏鸡绒毛洁净、光泽明亮；肛门干净，没有黄白色的稀粪粘着；脐部收缩良好，没有血痕存在；卵黄吸收良好，胸腹结构匀称；眼大有神，叫声洪亮；喙、眼、腿、爪等不是畸形；握在手中挣扎有力，感觉有弹性。凡是符合上述标准的就是健康雏鸡，若其中一标准不符合的就不能选用，因为弱雏成活率低，生长速度慢，不宜饲养。     

Osseous metaplasia in the eye of a dog

Incisional iris biopsy was performed for diagnosis of an unusual opaque white mass protruding from the right ventrolateral iris of a 10-year-old neutered male Great Dane dog. Histopathology revealed a diagnosis of bone formation within otherwise normal iris tissue. No underlying etiology was identified. Osseous metaplasia or heterotopic bone formation may be an additional differential diagnosis for a nonneoplastic mass in the eye of a dog.     

Osseous metaplasia within a canine insulinoma

An 11‐year‐old male castrated mixed‐breed dog was presented for exercise intolerance, tetraparesis, and persistent hypoglycemia. Abdominal ultrasound examination revealed 2 nodules within the right limb of the pancreas. Cytology from one nodule was consistent with a carcinoma of neuroendocrine origin, with a primary differential diagnosis of insulinoma. Histologic evaluation and immunohistochemistry for synaptophysin and insulin confirmed the diagnosis of insulinoma. Additionally, there was a solitary nodule of mineralized compact bone composing approximately 60% of the mass. To the authors' knowledge, this is the first report of osseous metaplasia within an insulinoma (islet cell carcinoma).     

Osseous lesions resembling vaccine-site sar comas in two cats

Extract

Lytic lesions with microscopic features similar to those of vaccine-site sarcomas were diagnosed in the distal femur of two young neutered male cats, one a 20-month-old Birman and the other an 18-month-old domestic short-hair (DSH). Radiographically, there was extensive destruction of trabecular and cortical bone in the metaphysis and/or epiphysis of the distal femur. The DSH cat also had angular deformity of the distal femur due to asymmetrical involvement of the physis. Histologically, the lesions in both cats consisted of dense, interwoven bundles of fibrous connective tissue, amongst which there were variable numbers of plump malignant mesenchymal cells, often with very large, hyperchromatic nuclei and irregularly shaped nucleoli. Several focal aggregates of small lymphocytes were present in both tumours. Although neither cat had apparently been vaccinated in the hindlimb it is possible that the tumours had been triggered by injection of some other irritant material.