四川省东方蜜蜂的形态学研宄

从四川省的7个县共采集了29群东方蜜蜂的样本,每群测定分析15只工蜂,每只工蜂总共有38个测定的形态特征.对测定的性状特征数据进行主要成分分析、因素分析和聚类分析,发现:四川省7个县的东方蜜蜂分为2个类群,位于四川盆地的东方蜜蜂为一个类群,位于川西高原的东方蜜蜂为另一个类群.     

犬慢性维生素A中毒1例

犬慢性维生素A中毒多是由于长期大量地食入动物肝脏或长期应用维生素A制剂造成,最近临床上就诊1例此病例,现报道如下:一、病犬基本情况2006年12月7日一头德国牧羊犬(公、3岁)来我院就诊,犬主称,该犬平时以动物肝脏为主食至少已三年时间,半年前开始发病,     

A re-evaluation of the minimum vitamin A requirement of growing-finishing lambs

The minimum vitamin A requirement of growing-finishing lambs was determined by depleting 24 Rambouillet lambs (15.0 +/- .59 kg) of their vitamin A stores and then feeding them for 16 wk one of six fixed intakes of vitamin A (2, 4, 8, 16, 32 or 64 micrograms retinol.kg live wt-1.d-1). Plasma retinol concentrations at the end of the depletion phase averaged 6.0 +/- .6 micrograms/dl. The relationship between vitamin A intake (micrograms retinol.kg live wt-1.d-1, X) and plasma retinol concentration (micrograms/dl, Y) at the end of 16 wk of supplementation was Y = 1.40 + 2.08X-.015X2 (r = .98). The relationship between vitamin A intake (micrograms retinol.kg live wt-1.d-1, X) and liver retinol concentration (log10 micrograms/100 g wet wt, Y) was Y = 1.34 + .058X-.00044X2 (r = .90). Cerebrospinal fluid (CSF) pressures were elevated in lambs fed the 2-, 4- and 8-micrograms levels of vitamin A intake. A broken-line regression model was used to describe the relationship between vitamin A intakes and CSF pressures, and to define minimum vitamin A requirements. The equation obtained was Y = 2.206-.292 (X-1.146) theta, r = .95, where X = vitamin A intake (log10 micrograms retinol.kg live wt-1.d-1) and Y = CSF pressure (log10 mm saline). In this model theta = 1 when X less than or equal to 1.146 and theta = 0 when X greater than 1.146.(ABSTRACT TRUNCATED AT 250 WORDS)     

一株A型副鸡嗜血杆菌的分离鉴定

从山东省某蛋鸡场发病鸡群中分离到一株细菌,经培养特性观察、生化试验、V因子生长试验、致病性试验和PCR试验,证实分离菌为一株致病性副鸡嗜血杆菌,血清型鉴定该菌为A型。药物敏感性试验表明分离菌对头孢噻肟、头孢曲松、丁胺卡那霉素高度敏感,对硫酸新霉素、强力霉素中度敏感,对磺胺间甲氧嘧啶钠、环丙沙星、庆大霉素耐药。     

我有一个梦想

我有一个梦想：养一群漂亮而能飞的鸽子．它们不仅看着让人赏心悦目,而且还能从遥远而陌生的异乡执着而快速地返回自己的老巢,从而不辜负我对它们的殷殷期盼。十年过后,再回首自己所走过的养鸽之路．我发现这个梦想其实离自己相当遥远．或许这一辈子也实现不了。     

塞尼卡病毒A研究进展

塞尼卡病毒A(SenecavirusA,SVA),原名塞尼卡谷病毒(Senecavalleyvirus,SVV),近年来被证实可引起猪鼻、唇、蹄部等出现水泡性病变,还可造成流行性短暂性新生仔猪损失。该病毒已在美国、加拿大、巴西、中国等地流行,危害养猪业健康发展。本文从SVA的病原特征、疫病流行现状、诊断和防控等方面进行综述,帮助畜牧兽医工作者了解该病毒病。     

一例盲肠肝炎感染的诊治

一选择最适宜的给药方法 在给家禽投药前，首先要根据用药的目的、病情缓急及药物本身的性质来确定最适宜的给药方法。如预防用药，一般是拌料或饮水等，这样可省工省时；如个别治疗用药，一般是口服、注射，这样做可使用药的剂量准确、效果确实。一般的抗球虫药及抗组织滴虫药，只有在一定时间内连续使用才有效，因此多采用拌料给药。抗生素用于促进生长及控制某些传染病时，也可混于其中给药。     

A case of angiokeratoma

Angiokeratoma is described by various authors as a rare variant of the hemangioma in the dog, characterized by a vascular component, like all types of vascular neoplasms, but also by an epithelial component. A case of angiokeratoma is described in a male 8-year-old dog. The tumor was located in heavily pigmented skin on the anterior surface of the front limb and not in the more usual previously described locations, eyelid and conjunctiva. Microscopic examination revealed a well-circumscribed mass with irregular hyperplasia of the epidermis and dilated vascular spaces filled with blood in the superficial dermis.