Cyathostome fecal egg count trends in horses treated with moxidectin, ivermectin or fenbendazole

Commercial preparations of fenbendazole (Safe-Guard, Intervet), ivermectin (Eqvalan, Merial) or moxidectin (Quest, Fort Dodge) were administered once to horses scheduled for routine parasiticide treatment. In total, 93 horses from six cooperating farms were used in the study. Computer generated, random allocation of horses to treatment group was conducted at each farm. Fecal egg counts were determined for all horses on trial days 0, 56, 84 and 112, with corresponding calendar dates that were unique to each farm. Only strongyle egg counts from animals which were positive at day 0 were used for analysis of variance and comparisons. Counts for the three treatment groups were similar at day 0, moxidectin相似文献   

有机无机肥配施对科尔沁沙地衬膜稻田沙土理化特性的影响

有机无机肥配施对培肥地力,提高土壤有机质含量有重要作用。研究有机无机肥配施对沙地衬膜稻田沙土理化性质的影响,旨在为科尔沁沙地衬膜水稻合理施肥提供科学依据。本试验样品采自未开垦沙地(衬膜前沙土)和采用有机无机肥配施1年(A1)、5年(A2)、10年(A3)衬膜稻田的沙土,研究沙地衬膜稻田沙土的物理性质(容重、孔隙度及机械组成)和沙土的化学性质(全量、速效养分及阳离子交换量等)的变化。结果表明:与CK相比,A1、A2和A3处理沙土容重下降了0.63%~3.80%,孔隙度上升了2.15%~7.89%;沙粒(2~0.02 mm)含量下降了1.33%~7.72%,粉粒(0.02~0.002 mm)和粘粒(0.002 mm)含量分别上升了4.44%~21.53%和0.28~1.76倍,其中沙土孔隙度、粉粒和粘粒含量各处理间差异达到了极显著水平(P0.01),沙粒各处理间差异达显著水平(P0.05)。A1、A2和A3处理沙土全氮、全磷和全钾的含量分别比CK处理增加了85.42%、12.00%和27.91%,除CK处理外,各处理间这三项指标之间的差异达到极显著水平(P0.01)。衬膜稻田沙土有机质、铵态氮、硝态氮、速效磷、速效钾和沙土阳离子交换量分别比CK处理增加了0.12~4.06 g·kg~(-1),0.74~3.21 mg·kg~(-1)、0.25~9.21 mg·kg~(-1)、0.11~1.10 mg·kg~(-1)、2.49~16.30 mg·kg~(-1)和0.22~6.31 cmol(+)·kg~(-1),其中有机质和速效磷各处理之间的差异达到极显著水平(P0.01)。有机无机肥配施使衬膜稻田沙土有机质、速效养分和全量养分的含量显著增加,CEC含量提高,沙土容重下降,孔隙度上升,土壤颗粒细化(粘化),有机无机肥配施是改良沙土理化性状,提高科尔沁沙地衬膜稻田沙土肥力的有效途径。     

Fecal egg count reductions and performance effect of Dectomax, Cydectin, and Cydectin plus Synanthic as used in feedlot steers

A study was conducted to assess the effectiveness (fecal egg count reductions) and benefit (improvement in feed efficiency, average daily gain, health, and so forth) of a macrocyclic lactone (moxidectin [Cydectin Injectable] or doramectin [Dectomax 1% Injectable]) alone or in combination with a benzimidazole (oxfendazole [Synanthic Bovine Dewormer]) as used in steers upon their arrival at a feedlot. The cattle were kept in the feedlot for 181 days. Only minor differences in fecal egg count reductions were seen among treatments, with all egg counts reduced by more than 98% by 28 days posttreatment. Likewise, no statistically significant differences among treatments were seen in terms of animal performance (feed efficiency, intake, gain, morbidity, mortality, and carcass quality). All three treatment regimens appear to be comparable in decreasing nematode burdens and the consequences thereof in feedlot cattle.     

Post-Harvest Studies on Autumn-Drilled Bulb Onions. The Effect of Harvest Date,Conditioning Treatments and Field Drying on Skin Quality and on Storage Performance

Overwintered onion cvs Express Yellow and Senshyu Semi-globe Yellow were harvested at 80% foliar fall-over (early June) and two and four weeks later, in 1975 and 1976. Plants were conditioned for one (1975) or two weeks (1976) at 20°C, 70% RH or 30°C,60% RH or field dried, and then stored at ambient temperature. Measurements of fresh weight loss during the first six weeks after harvest in 1976 indicated that drying was slow and was incomplete after 14 days conditioning at 30°C. Skin staining and splitting generally increased with delay in harvest date. Skin colour improved with delay in harvest date and with conditioning at 20°C. Wastage due to both rotting and sprouting during storage was generally lower when plants from the first two harvest dates were conditioned at 30°C. These bulbs are likely to be useful for long-term storage as total wastage levels of only 20% were reached in both cultivars after 3-5 months storage. Good field drying of the bulbs could not be consistently obtained and consequently storage performance was more variable than for bulbs conditioned at 20 °C and 30 °C before storage.     

Multicentric lymphoblastic lymphoma in a loggerhead sea turtle (Caretta caretta)

A juvenile female loggerhead sea turtle (Caretta caretta) stranded in Gran Canaria was submitted for necropsy. The turtle had exhibited anorexia and lethargy for 2 weeks prior to its death. At necropsy, the thymus was enlarged by two white and firm nodules. White nodules similar to those in thymus were observed in the plastron, thyroid gland, heart, aorta, left lung, spleen, liver, kidneys, stomach, and small intestine. Histopathology revealed a neoplastic proliferation of round cells identified as lymphoid cells. Ultrastructurally, the neoplastic cells were consistent with lymphoblastic cells, and viruses were not detected. The diagnosis was multicentric lymphoblastic lymphoma. This is the first report of a lymphoid neoplasm in a sea turtle.     

青南高海拔地区高寒草甸植物群落多样性的研究

根据 42个样地的实地调查资料 ,采用不同的物种多样性指数、丰富度和均匀度测度指标对达日县建设乡高海拔地区高寒草甸的物种多样性进行了分析 ,结果表现为 :草地物种多样性随海拔的升高总体上呈现下降的趋势 ;“黑土滩”物种多样性指数、丰富度和均匀度指数最低 ,草地生物量也最低。苔草、嵩草和灌丛草甸 ,有着较高的物种多样性指数、丰富度和均匀度指数。单子叶和灌丛植物生物量随海拔梯度的变化较为复杂 ,在一定海拔范围内有较高的生物量。双子叶植物生物量随海拔的升高基本呈现下降趋势     

The production and application of non-rodent monoclonal antibodies in veterinary science

The requirement for monoclonal antibodies derived from species other than rats and mice is becoming increasingly realised in veterinary, as well as human, medicine. This paper reviews current knowledge of the production of inter-species hybridomas (heterohybridomas) by the fusion of rodent myeloma cell lines with lymphocytes from species of veterinary importance. To date a number of monoclonal immunoglobulins derived from sheep, cattle, pig, rabbit, mink and primate species have been produced to a variety of different bacterial, viral and nematode pathogens as well as to blood group and MHC determinants and to hormones. The technique opens up a number of possibilities for the future; some of these applications are discussed in relation to the antibodies produced thus far.     

Application of immunoperoxidase-based techniques to detect herpesvirus infection in tortoises.

Indirect (IIP) and direct (DIP) immunoperoxidase assays were developed for the serological and histological diagnoses of herpesvirus infection in tortoises, respectively. A mouse monoclonal antibody (MAb HL1546), specific for the heavy chain of tortoise IgY, was used as the secondary antibody in the IIP assay. Rabbit polyclonal antisera raised against 2 sucrose gradient-purified tortoise herpesvirus isolates (HV4295/7R/95 and HV1976) were used as primary antibodies for the detection of herpesvirus antigen either in infected cell cultures or in formalin-fixed, paraffin-embedded tissues. The IIP and DIP assays could detect either the presence of anti-herpesvirus antibody in the plasma of exposed tortoises or the presence of herpesvirus antigen in infected tissues, respectively. Although the IIP test complements the enzyme-linked immunosorbent assay and the serum neutralization test already available for measuring herpesvirus-specific antibody in tortoises, the DIP test is useful for the histological diagnosis of herpesvirus infection in tortoises.