如何预防家庭农场猪繁殖与呼吸综合征

本文对猪繁殖与呼吸综合征的常见症状进行探讨,指出了急性猪繁殖与呼吸综合征和慢性猪繁殖与呼吸综合征的不同症状表现,提出家庭农场应从做好对外源性输入的控制、做好饲养工作、做好消毒管理工作和做好免疫预防工作等方面有效预防猪繁殖与呼吸综合征,供参考。     

猪繁殖与呼吸综合征的防控

猪繁殖与呼吸综合征是一种传染病,由猪繁殖与呼吸综合征病毒引起,主要危害繁殖母猪和仔猪.介绍了猪繁殖与呼吸综合征的发病情况、临床症状、病理变化以及诊断与防控方法.     

猪繁殖与呼吸综合征的综合防制

猪繁殖与呼吸综合征（蓝耳病）是目前我国养猪生产中疫病控制的难点,本文就猪繁殖与呼吸综合征病原、致病机理、流行病学、临床症状、剖检病变、预防和控制等方面阐述了猪繁殖与呼吸综合征及其综合防制。     

猪繁殖与呼吸综合症的研究进展

猪繁殖与呼吸综合征是由猪繁殖与呼吸综合征病毒引起的高度传染性疾病。自发现首例病例以来,对猪繁殖与呼吸综合征已开展大量研究。现就此病的病原学、流行特点、临床症状及病理变化、诊断、防治措施、存在的问题作以综述。     

中药防制猪繁殖与呼吸综合征的研究进展

猪繁殖与呼吸综合征(porcine reproductive and respiratory syndrome,PRRS)是由猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)引起的一种急性、高度接触性传染病,临床症状主要表现为母猪发热、厌食、流产或死胎、木乃伊胎,仔猪常出现呼吸系统症状和高死亡率。文章从猪繁殖与呼吸综合征中医发病机理、中药抗病毒的机制、单味中药和复方制剂对猪繁殖与呼吸综合征的防制作一总结。     

第2讲:生猪疫病防控篇之 猪繁殖与呼吸综合征(PRRS)预防与诊治

1猪繁殖与呼吸综合征(PRRS)概论猪繁殖与呼吸综合征(PRRS)是由猪繁殖与呼吸综合征病毒(PRRSV)引起的一种严重危害养猪业的烈性传染病,又称"蓝耳病"。临床表现为母猪繁殖障碍,怀孕母猪呈现流产,产死胎、木乃伊胎及弱仔等症状;仔猪及育成猪表现为呼吸系统症状,仔猪死     

猪繁殖与呼吸综合征诊治经验谈

猪繁殖与呼吸综合征是一种由病毒引起的以繁殖障碍和呼吸系统症状为特征的急性、高度传染的病毒性传染病。笔者在猪的饲养过程中发现多例猪繁殖与呼吸综合征的病猪,临床的诊治后收效比较明显。现将诊治过程做以详述,以供同行参考。(一)流行病学1.传染源。猪繁殖与呼吸综合征(PRRS),又称蓝耳病,是由猪繁殖与呼吸综合征病毒引起     

猪繁殖与呼吸综合征的研究进展

猪繁殖与呼吸综合征是(PRRS)由猪繁殖与呼吸综合征病毒(PRRSV)引起,以母猪繁殖障碍和仔猪呼吸道综合征为主要特征。为了更好地认识猪繁殖与呼吸综合征在我国的发生与流行,本文对PRRS的病原学、流行病学、发病机理、临床症状与防治等方面的研究进展进行综述。     

猪繁殖与呼吸综合征

猪繁殖与呼吸综合征1987年首次于美国暴发,该病主要经胎盘感染,引起怀孕母猪流产、死胎及木乃伊胎。猪繁殖与呼吸综合征几乎存在于世界上每一个养猪国家。论文就猪繁殖与呼吸综合征的病原特征、基因结构、结构蛋白、流行特征、病理变化与症状、演化、疫苗的应用等方面进行综述。     

一例猪繁殖与呼吸综合征的诊断与防制

猪繁殖与呼吸综合征(Porcine Reproductive and Respiratory Ryndrome PRRS),又称蓝耳病,发病率高,死亡率高,对猪的养殖会造成巨大的经济损失。为了更好地进行猪繁殖与呼吸综合征的诊断和防制,本文针对吉林省某商品猪繁育场母猪流行繁殖障碍和仔猪发病死亡情况,根据临床症状、剖检病变、实验室检查和实时荧光RT-PCR方法,确诊一起猪繁殖与呼吸综合征。在应用猪繁殖与呼吸综合征灭活疫苗给种猪和保育仔猪免疫接种无效的情况下,通过改用猪繁殖与呼吸综合征活疫苗(R98株)对种猪和保育仔猪免疫接种、加强饲养管理、改善猪舍环境等防制措施,猪繁殖与呼吸综合征的流行得到了有效控制。由于猪繁殖与呼吸综合征的毒力因子现在仍然处于一个不断变化的状态,因此比较难处理,但此次对某商品猪场猪繁殖与呼吸综合征的有效控制,可以为今后该病的诊断和防治提供参考。     

浅析当前畜禽调运工作中存在的问题及对策

1 当前畜禽调运中存在的问题 1．1 调运户动物防疫意识不强 一是个别调运户未申领《动物防疫合格证》，没有动物防疫知识和相关法律法规知识．是违规调运的根源．     

Anaesthesia and analgesia of the donkey and the mule

The number of donkeys and mules throughout the world is stable, and awareness of their use and concern for welfare, pain recognition and treatment are receiving increasing veterinary interest. Therefore, accurate information about anaesthesia and analgesia in donkeys and mules is important to ever more equine practitioners. Since donkeys are physiologically and pharmacologically different from horses, knowledge on species specific aspects of anaesthesia and analgesia are very important. Mules combine elements from both donkey and horse backgrounds, leading to great diversity in size, temperament and body type. Physiologically, they seem to resemble horses more than donkeys. This review highlights the current knowledge on various anaesthetic and analgesic approaches in donkeys and mules. There is still much information that is not available about donkeys; in many circumstances, the clinician must use available equine information to treat the patient, while monitoring carefully to observe for differences in response to therapy compared to the horse.     

貉,蓝狐,银狐的胃及十二指肠内嗜银细胞形态分布的研究

本文应用Ｆｏｒｔａｎａ—Ｍａｓｓｏｎ嗜银颗粒染色法研究了貉、蓝狐、银狐的胃及十二指肠内嗜银细胞的形态分布。结果表明：三种动物胃幽门腺中，嗜根细胞数量最多，呈锥状，嗜银颗粒较粗，密度大、染成深黑色。在胃底及胃贲门腺区、嗜银细胞数量少。在十二指肠部嗜银细胞呈蝌蚪形，嗜银颗粒细，呈黑褐色，密度较小。嗜银细胞的分布密度在三种动物中具有一定的差别。     

The relation between the birth process and the condition of the newborn piglet and calf

Fluxes of the anti-parasitic agents, [³H]-ivermectin, [³H]-selamectin and [³H]-moxidectin were studied across non-transfected and transfected canine kidney epithelial monolayers, MDCK II/wt, MDCK II-MDR1, MDCK II-MRP1 and MDCK II-MRP2. All four lines surprisingly expressed significant levels of P-glycoprotein (P-gp), coded for by MDR1, but MDCK II-MDR1 expressed increased levels compared to the other lines. MDCK II-MRP1 and MDCK II-MRP2 expressed increased levels of MRP1 and MRP2 respectively. Fluxes of [³H]-ivermectin, [³H]-selamectin, [³H]-moxidectin, and the P-gp substrates, rhodamine-123 and DiOC₂, were polarized in the basolateral-to-apical (secretory) direction across the four lines. Selected MRP inhibitors used in relevant pharmacological concentrations did not block the secretory fluxes of either [³H]-ivermectin or [³H]-selamectin in either the non-transfected or MRP-transfected lines. In contrast, secretory fluxes of ivermectin and selamectin were inhibited in all four lines by the P-gp inhibitor, verapamil. These data confirm that ivermectin and selamectin are substrates for P-gp in four additional cell lines, but suggest that they are not significant substrates for MRP1 or MRP2 where there is background expression of P-gp. Since this pattern of expression also pertains on the blood-brain barrier, it is unlikely that MRP1 and MRP2 play a significant role in ivermectin and selamectin blood: brain distribution in vivo.     

Comparative ventilation and gas exchange in the horse and the cow

Ventilation and gas exchange were studied in healthy, adult horses and cows, two large species with different lung structures and different breathing patterns. The oxygen uptake (VO2), carbon dioxide output (VCO2), respiratory rate (fR), minute ventilation (VE), alveolar ventilation (VA), alveolar oxygen pressure (PAO2), and VE/VO2 ratio were higher in the cows, while the tidal volume (VT) and physiological dead space (VD) were larger in the horses. The arterial blood gases, alveolar-arterial oxygen pressure difference (PAO2-PaO2) and VD/VT ratio did not differ between the two species. The higher VO2 in the cows was most likely due to the energy cost of standing, and possibly to a higher cost of digestion. The higher VE, VA, VE/VO2 and PAO2 were most likely secondary to the increased VO2 and the slightly higher respiratory exchange ratio (R) in the cows. In contrast to hypotheses based on allometric equations, the PAO2 of horses and cows did not appear to differ from that of smaller mammals. The VD was larger than that predicted from allometric equations, and even though the VD/VT ratio (0.50) was lower than the previously reported values for horses and cows, it was significantly larger than the predicted weight-independent value of 0.36. Re-examination of the data used to derive the equation for VD raised questions as to the validity of this equation, and it is suggested that caution be exercised in the use of allometric equations for prediction.     

东西方蜜蜂越冬期过冷却点的测试及过冷却点与越冬性能的关系

针对越冬期东西方蜜蜂的过冷却点进行了测试并对其与越冬性能的关系进行了分析。结果发现:在越冬期,东西方蜜蜂存在过冷却点且二者差异显著,东方蜜蜂过冷却点明显低于西方蜜蜂,蜜蜂的过冷却点与其越冬性能密切相关。