Changes in clinical values of cattle infected with Clostridium chauvoei CH3 strain and a local Kad1 strain. Haematological values     

O el Sawi Mohamed  M H Tag el Din  S M el Sanousi 《Revue d'élevage et de médecine vétérinaire des pays tropicaux》1989,42(2):169-172

Clostridium chauvoei CH3 and Kad1 strains were found to cause marked changes in the blood parameters during the course of blackleg disease. These changes displayed by CH3 were found to be more marked than the local Kad1 strain. Results of changes in the haematological values in calves infected with blackleg organisms, showed an increase in RBC, PCV, Hb and the total leukocyte count. MCHC and MCH remained within normal range values, however, a terminal significant increase of MCV was obtained. Thrombocytes showed a steady drop after infection to the time of death of the animals.  相似文献   

Effect of pre‐milking teat disinfection on clinical mastitis incidence in a dairy herd in Northern Queensland,Australia          下载免费PDF全文

SM Rowe  WP Tranter  RA Laven 《Australian veterinary journal》2018,96(3):69-75

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Carriage rate and antibiotic susceptibility of coagulase‐positive staphylococci isolated from healthy dogs in Victoria,Australia          下载免费PDF全文

DC Bean  SM Wigmore 《Australian veterinary journal》2016,94(12):456-460

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A framework for evaluation of on-farm mastitis diagnostics in Australia     

RN Zadoks  E Scholz  SM Rowe  JM Norris  HB Pooley  J House 《Australian veterinary journal》2023,101(4):142-152

Numerous culture-based diagnostics are available on the Australian and international markets for on-farm detection of bacterial pathogens in milk. Use of such diagnostics may provide an opportunity to improve the prudent use of antimicrobials in udder health management. Farms are low-resource settings in terms of diagnostic microbiology capacity. The World Health Organisation has identified criteria for the evaluation of diagnostic tests in low resource settings based on Accuracy, Sensitivity, Specificity, User-friendliness, being Rapid or Robust, Equipment-free and being Deliverable (ASSURED). Here, we review how those criteria can be interpreted in the context of microbiological diagnosis of mastitis pathogens, and how on-farm diagnostics that are currently available in Australia perform relative to ASSURED criteria. This evaluation identifies multiple trade-offs, both with regard to scientific criteria and with regards to convenience criteria. More importantly, the purpose of testing may differ between farms, and test performance should be evaluated relative to its intended use. The ability of on-farm mastitis diagnostics to inform mastitis treatment decision-making in a timely and cost-effective manner depends not just on test characteristics but also on farm-specific pathogen prevalence, and on the farm enterprise's priorities and the farm manager's potential courses of action. With most assay evaluations to date conducted in professional laboratories, there is a surprising dearth of information on how well any of the diagnostic tests perform on-farm and, indeed, of the on-farm decision-making processes that they aim to inform.  相似文献   

油菜抗病毒病与过氧化物酶关系     

周必文  刘胜毅  陈道炎  余琦  杨建  王超英 《中国油料作物学报》1992,(2)

用于叶期苗在不接种病毒条件下测试过氧化物酶同工酶结果,在相对迁移率17％—47％内,有6个位点出现酶带,抗、感病品种的酶带数量、酶带出现的位点和强弱程度有明显差别。高抗品种酶带数最多,有E_3和E_4强带,E_3为弱带;高感品种酶带数最少,缺E_6和E_4,E_3为强带;低抗和低感品种的酶带介于高抗与高感品种之间。用酶带数量和各酶带强弱程度,或用酶谱薄层扫描积分值计算距离系数,而后聚类,聚类结果与抗、感病性分组完全一致。证明抗病性与过氧化物酶同工酶有密切关系,用不接种苗酶谱测定可以代替接种鉴定和田间鉴定。  相似文献   

轴流泵喇叭管的优化水力设计   总被引：1，自引：0，他引：1  

陆林广  曹志高  周济人  汤建熙  倪明娟 《排灌机械》1998,(1)

将喇叭管和开散式进水池内的流场视为一个整体,采用文献[3]介绍的直接求解雷诺平均N-S方程和标准K-ε紊流模型方程组的方法,模拟了进水池和喇叭管内的流动,并在此基础上对喇叭管的形状进行了水力优化计算。  相似文献   

在干旱胁迫下饲料型刺槐无性系保护酶活性的差异   总被引：4，自引：0，他引：4  

李忠喜  朱延林  张江涛  郝绍菊  韩磊 《安徽农业科学》2007,35(10):2868-2869

以3个饲料型刺槐无性系为研究对象,对干旱胁迫下保护酶类的活性差异进行了研究.结果表明,饲料型刺槐无性系在干旱胁迫下调动各种保护酶来清除体内的活性氧,以保护细胞膜不受活性氧的攻击,但不同的无性系对干旱胁迫有着不同的响应.3个无性系中韩国四倍体主要调动POD酶、匈牙利多倍体主要调动SOD、CAT酶、长叶刺槐主要调动POD、CAT酶.MDA的含量随着干旱胁迫的加剧逐渐增加达到最大值,然后出现下降.  相似文献   

Plants as de-worming agents of livestock in the Nordic countries: historical perspective, popular beliefs and prospects for the future.     

PJ Waller  G Bernes  SM Thamsborg  A Sukura  SH Richter  K Ingebrigtsen  J H?glund 《Acta veterinaria Scandinavica》2001,42(1):31-44

Preparations derived from plants were the original therapeutic interventions used by man to control diseases (including parasites), both within humans and livestock. Development of herbal products depended upon local botanical flora with the result that different remedies tended to develop in different parts of the world. Nevertheless, in some instances, the same or related plants were used over wide geographic regions, which also was the result of communication and/or the importation of plant material of high repute. Thus, the Nordic countries have an ancient, rich and diverse history of plant derived anthelmintic medications for human and animal use. Although some of the more commonly used herbal de-wormers were derived from imported plants, or their products, many are from endemic plants or those that thrive in the Scandinavian environment. With the advent of the modern chemotherapeutic era, and the discovery, development and marketing of a seemingly unlimited variety of highly efficacious, safe synthetic chemicals with very wide spectra of activities, herbal remedies virtually disappeared from the consciousness--at least in the Western world. This attitude is now rapidly changing. There is a widespread resurgence in natural product medication, driven by major threats posed by multi-resistant pest, or disease, organisms and the diminishing public perceptions that synthetic chemicals are the panacea to health and disease control. This review attempts to provide a comprehensive account of the depth of historical Nordic information available on herbal de-wormers, with emphasis on livestock and to provide some insights on potentially rewarding areas of "re-discovery" and scientific evaluation in this field.  相似文献   

Are Endocrine Disrupting Compounds a Threat to Farm Animal Health,Welfare and Productivity?     

SM Rhind 《Reproduction in domestic animals》2005,40(4):282-290

Contents The sources and characteristics of endocrine disrupting compounds (EDCs) are reviewed and discussed with respect to their potential effects on farm animal health, welfare and productivity. The importance of certain properties of these compounds in relation to the expression of their biological effects is addressed together with potential routes of exposure. It is concluded that little is known of factors affecting the tissue concentrations of EDCs in farm animals, the concentrations that are required to perturb physiological function in these species, the effects of prolonged exposure to low doses, the effect of cocktails of EDCs and other pollutants or the responses of specific organs and physiological systems that are affected by EDCs. Much of the available information pertaining to EDCs is derived from epidemiological studies of wildlife species and from laboratory animal studies and while these studies have significant limitations, they are considered to be valuable indicators of potential effects in farm animal species. The results of such studies, together with the small amounts of data from studies of ruminants, indicate that there may be significant effects of exposure to environmental levels of EDCs on farm animal health, even although effects are not generally apparent in practice, at this time.  相似文献   

Miliary bovine farcy experimentally induced in a Zebu calf.     

S M El Sanousi  M A Salih 《Veterinary pathology》1979,16(3):372-373

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