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将STK猪瘟活疫苗、ST猪瘟活疫苗、猪瘟脾淋组织苗和生理盐水(对照组)分别接种CSFV血清学阴性(CSFV抗体阻断率≤30%)的断奶仔猪,用美国IDEXX公司的猪瘟抗体检测试剂盒检测其抗体水平的动态变化差异,并分析抗体合格率(或阳性率)、阻断率等指标。结果表明:仔猪二次免疫STK猪瘟活疫苗后25天(即90日龄),猪瘟抗体的合格率达到100%,其中85%仔猪的抗体水平达到了比较高的滴度(阻断率≥60%),且二次免疫后在整个生长期都能维持较高的抗体水平。免疫ST猪瘟活疫苗及猪瘟脾淋组织苗后,在90日龄猪瘟抗体的合格率虽能达到或接近100%,但抗体水平处于高滴度的比例不大:ST细胞苗40%仔猪抗体阻断率≥60%,脾淋苗只有35%仔猪抗体阻断率≥60%,均低于免疫STK猪瘟活疫苗的抗体水平,且较高抗体水平维持的时间短于STK猪瘟活疫苗。各项结果表明,STK猪瘟活疫苗对仔猪有很好的免疫效果,能产生较高水平及较长时间的免疫保护力,且免疫效果优于ST猪瘟活疫苗和猪瘟脾淋组织苗。 相似文献
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《中国兽医学报》2016,(12):2014-2018
为提高猪瘟(CSF)活疫苗的耐热性能,同时避免明胶和蛋白对猪只产生的免疫副反应,用葡聚糖、聚乙烯吡咯烷酮、乳糖、氨基酸等成分设计无明胶无蛋白耐热保护剂,根据配方的共晶点、塌陷温度科学设计冻干程序,并比较了不同预冻方式对猪瘟活疫苗效价的影响。结果表明,猪瘟病毒采用无明胶无蛋白耐热保护剂配方A冻干后具有较好的耐热性能,37℃保存10,15d,病毒的耐热损失分别为0.6lg和0.9lg;对快冻、慢冻以及退火3种不同的冻干方式进行比较,发现对猪瘟病毒冻干损失由大到小依次为:退火慢冻快冻,而耐热损失则相反;与传统的含明胶含蛋白耐热疫苗相比,猪瘟无明胶无蛋白耐热疫苗耐热效果更好,可在2~8℃长期保存30个月,动物试验表明该疫苗对猪只安全、无副反应。 相似文献
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为准确掌握猪瘟疫苗免疫效果,2010-2012年对投放安徽省的猪瘟疫苗免疫效果进行了监测。采用抗体阻断ELISA方法,检测了454个猪场7439份免疫猪瘟弱毒活疫苗1个月左右的血清中猪瘟免疫抗体水平。结果显示,安徽省猪瘟疫苗免疫效果总体良好,免疫抗体合格率超过了70％：脾淋组织苗和细胞苗免疫效果相当,但脾淋组织苗免疫效果稳定,细胞苗免疫效果稳定性较差：不同厂家疫苗免疫效果参差不齐。 相似文献
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《中国畜牧兽医文摘》2010,(1)
<正>1.要使用猪瘟兔化弱毒单苗猪瘟兔化弱毒犊牛睾丸细胞苗,又称猪瘟活疫苗(Ⅱ)或猪瘟兔化弱毒兔脾淋组织苗,又称猪瘟活疫苗(Ⅰ),不要使用猪瘟-猪丹毒-猪肺疫"三联苗"。当前的猪瘟"三 相似文献
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不同猪瘟疫苗对仔猪免疫效果对比试验 总被引：6，自引：0，他引：6
试验随机选择了5窝断奶仔猪,每窝6头,共30头。随机分成3个组,每组10头,其中试验1组接种猪瘟兔化弱毒细胞苗(猪瘟活疫苗Ⅱ系),试验2组接种猪瘟组织苗(猪瘟活疫苗Ⅲ系),试验3组接种猪瘟脾淋苗(猪瘟活疫苗Ⅰ系),每头仔猪均接种剂量2头份。在免疫15d后,分别采血、分离血清、检测猪瘟抗体水平。检测结果,试验1组、试验2组、试验3组的平均抗体水平分别为1∶56、1∶60、1∶194。统计分析表明:猪瘟脾淋苗免疫效果最好(P<0.01),而猪瘟细胞苗和组织苗两者抗体水平差异不显着(P>0.05),但从总体上看3种疫苗使用2头份剂量免疫15d后都能使仔猪获得良好的保护力。 相似文献
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提取猪源FMDV China99/S组织样品总RNA,利用设计的引物对,分段进行扩增,获得覆盖全基因组的4个重叠片段(A、B、C和E),然后用BsmB Ⅰ/Xma Ⅰ、Xma Ⅰ/BamH Ⅰ、BamH Ⅰ/Not Ⅰ、Hpa Ⅰ/Kpn Ⅰ分别双酶切A、B、E、C,并纯化回收,依次定向克隆到带有聚合酶Ⅰ的pPⅠ cDNA3.1(+)转录载体内,最终得到重组质粒pP1-FMDVcDNA3.1(+);然后对该质粒进行序列测定.结果表明,China99/S株基因组全基因组序列长8 116 nt(含Poly(C)和Poly(A)片段),其中5′NCR长1 064 nt,蛋白编码区核苷酸序列为6 318 nt,编码1个由2 106个氨基酸组成的聚合蛋白,3′NCR长93 nt,其后是含有38个A碱基的Poly(A)尾.其中5′NCR引入含41个C的Poly(C)片段.将pPⅠ FMDVcDNA3.1(+)用脂质体转染法导入BHK-21细胞,传代培养,可以观察到典型的FMDV致细胞病变效应.利用CPE、电镜、动物试验、RT-PCR和序列测定进行检测,结果表明,从该系统中成功拯救出具有感染性的猪源FMDV China99/S株重组病毒. 相似文献
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Trevor B. Enberg DVM Laurence D. Braun DVM DACVECC Alan B. Kuzma DVM DACVS 《Journal of Veterinary Emergency and Critical Care》2006,16(1):34-43
Objective: Five canine cases of gastrointestinal (GI) perforation and septic peritonitis associated with the routine use of meloxicam are reviewed. Series summary: Selective cyclooxygenase‐2 (COX‐2) non‐steroidal anti‐inflammatory drugs (NSAIDs) are being used more extensively and routinely for acute and chronic pain as well as for perioperative management of pain. These medications are safe and effective but can be associated with known GI and renal side effects. The patients in this case series had no significant concurrent illness, were not on any concurrent medication known to potentiate the ulcerogenic effects of NSAIDs, and in most cases did not display clinical signs that were apparent to the owners until the time of perforation. New or unique information provided: Despite the preferential selectivity for COX‐2, newer NSAIDs still carry the risk of GI performation. The incidence of GI perforation may be increased with inappropriate dosing regimens, with use of non‐veterinary products and in animals that are at high risk for toxicity. Early signs of toxicity may include alteration in appetite, and subtle signs of nausea during treatment. Warning owners to monitor their pet for vomiting, melena, and hematemesis may not be sufficient to avoid the potential disastrous consequences of GI ulceration. 相似文献
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采用聚丙烯酰胺凝胶电泳法对３４头白唇鹿，５８头马鹿和１１头梅花鹿的血清淀粉酶同工酶进行了比较研究。结果发现：（１）３种鹿的血清淀粉酶都有ＡＭＹ１，ＡＭＹ２和ＡＭＹ３种同工酶，但白唇鹿ＡＭＹ１和ＡＭＹ２同工酶的相对迁移率小于马鹿和梅花鹿；（２）３种鹿的ＡＭＹ１同工酶都有ＡＭＹ１Ｆ和ＡＭＹ１Ｓ两种表型，以ＡＭＹ１Ｆ为优势表型（分别为６４．７１％，６８．９７％和８１．８２％）；（３）白唇鹿的ＡＭＹ２同工酶存在ＡＭＹ２ＡＡ，ＡＭＹ２ＡＢ和ＡＭＹ２ＢＢ３种表型，以ＡＭＹ２ＡＡ为优势表型（５０．００％）；（４）马鹿的ＡＭＹ２同工酶存在ＡＭＹ２ＡＡ，ＡＭＹ２ＡＢ，ＡＭＹ２ＢＢ和ＡＭＹ２Ｏ４种表型，梅花鹿存在ＡＭＹ２ＡＢ和ＡＭＹ２ＢＢ两种表型，以ＡＭＹ２ＡＢ为优势表型（分别为８９．６６％和９０．９１％）。 相似文献
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鸡传染性支气管炎病毒(IBV)干扰新城疫病毒(NDV)增殖现象的研究 总被引：2，自引：0，他引：2
ＩＢＶ毒株Ｈ１２０、Ｈ５２、ＭＡ５对ＮＤＶ－ＬａＳｏｔａ的干扰实验证明ＩＢＶ特异性干扰ＮＤＶ增殖。１）采取不同顺序的同胚接种法：ＩＢＶ接种之后再接种ＮＤＶ;或ＮＤＶ接种之后再接种ＩＢＶ,及ＩＢＶ,ＮＤＶ同时接种,ＩＢＶ均干扰ＮＤＶ的增殖。２）ＮＤＶ接种３６小时之内,干扰现象最为明显,Ｈ１２０,Ｈ５２的干扰能力稍强于ＭＡ５。３）ＮＤＶ血清中和实验结果显示,不同顺序同胚接种ＮＤＶ、ＩＢＶ时,ＮＤＶ－ＬａＳｏｔａ不影响ＩＢＶ的增殖能力。同胚增殖ＩＢＶ,ＮＤＶ的关键是控制ＮＤＶ、ＩＢＶ的接毒量及选择合适的收毒时间。 相似文献
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Akihiko HAGINO Eiji INOMATA Takuya SATO Yasushi OHTOMO Yasuyuki SASAKI Yoshiaki OBARA 《Animal Science Journal》2005,76(1):55-63
This study was designed to examine the effects of the proportion of concentrate in the diet on the secretion of growth hormone (GH), insulin and insulin‐like growth factor‐I (IGF‐I) secretion and the GH‐releasing hormone (GHRH)‐induced GH response in adult sheep fed once daily. Dietary treatments were roughage and concentrate at ratios of 100:0 (0% concentrate diet), 60:40 (40% concentrate diet), and 20:80 (80% concentrate diet) on a dry matter basis. Mean plasma concentrations of GH before daily feeding (10.00–14.00 hours) were 11.4 ± 0.4, 10.1 ± 0.5 and 7.5 ± 0.3 ng/mL on the 0, 40 and 80% concentrate diet treatments, respectively. A significant decrease in plasma GH concentration was observed after daily feeding of any of the dietary treatments and these decreased levels were maintained for 8 h (0%), 12 h (40%) and 12 h (80%), respectively (P < 0.05). Plasma IGF‐I concentrations were significantly decreased 8–12 h and 4–16 h after the end of feeding compared with the prefeeding level in the 40 and 80% concentrate diet treatments, respectively (P < 0.05). GHRH injection brought an abrupt increase in the plasma GH concentrations, reaching a peak 10 min after each injection, but, after the meal, the peak plasma GH values for animals fed 40% (P < 0.05) and 80% (P < 0.01) concentrate diet were lower than that for roughage fed animals. The concentrate content of a diet affects the anterior pituitary function of sheep resulting in reduced baseline concentrations of GH and prolonged GH reduction after feeding once daily. 相似文献
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VIRTUAL ENDOSCOPY OF DOGS USING MULTI-DETECTOR ROW CT 总被引：1，自引：0，他引：1
KAZUTAKA YAMADA MANABU MORIMOTO MIORI KISHIMOTO ERIK R. WISNER 《Veterinary radiology & ultrasound》2007,48(4):318-322
Virtual endoscopy uses CT data to display hollow viscera such as the stomach, duodenum and colon as if by real endoscopic observation. The results are independent of the operator skill because virtual endoscopy does not require direct manipulation of endoscopic equipment. The purpose of this study was to evaluate the utility of virtual endoscopy in small animals. Ten beagles were examined by conventional endoscopy and virtual endoscopy using multidetector CT. Virtual images were image-processed at a workstation designed for depicting virtual endoscopy using CT data. Virtual images were visually comparable with conventional endoscopic images, especially in the area of the angular incisure and pylorus. The advantages of virtual endoscopy are observation from any viewing angle, a reduced learning curve for diagnostic interpretation, quantification of lesion size in three dimensions and a potential for reducing anesthesia time. The disadvantages of virtual endoscopy are a lack of color recognition information, an inability to retrieve biopsy samples, limited visualization of the duodenum, artifacts from respiration/peristalsis motion and an inability to observe function. Based on our results, we suggest that conventional endoscopy is still superior to virtual endoscopy in dogs. However, as technology improves, virtual endoscopy may emerge as a suitable alternative or adjunctive diagnostic tool for certain digestive disorders in small animals. 相似文献
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OBJECTIVE: To examine the anatomy of the ciliary body in the West Indian manatee (Trichechus manatus), paying close attention to its vascularization and to compare to those of its distant relative, the African elephant (Loxodonta africana), the amphibious hippopotamus (Hippopotamus amphibius) and the aquatic short-finned pilot whale (Globicephala macrorhynchus). PROCEDURE: Specimens from each species were preserved in 10% buffered formalin, and observed stereomicroscopically before being embedded in paraffin, sectioned and stained by Masson trichrome, hematoxylin and eosin, and periodic acid-Schiff for light microscopic evaluation. RESULTS: The network of blood vessels in the ciliary processes of the West Indian manatee appear to have an intricate pattern, especially with regard to venous outflow. Those of the elephant are slightly less complex, while those of the hippopotamus and whale have different vascular patterns within the ciliary body. Musculature within the ciliary body is absent within the manatee and pilot whale. CONCLUSIONS: In general, there appears to be a direct relationship between the increased development of vasculature and the loss of musculature within the ciliary bodies of the aquatic and amphibious mammals presently studied. Specifically, the ciliary body of the West Indian manatee has a comparatively unique construction, especially with regard to its vasculature. 相似文献
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鸡传染性法氏囊病（ＩＢＤ）和新城疫（ＮＤ）病毒接种同一鸡胚收取种毒试制ＩＢＤ、ＮＤ二联弱毒冻干疫苗,并按《规程》方法分别检验。结果证明安全、效力均能达到合格标准,两种病毒互相不干扰抗体的产生。 相似文献