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1.
猪两种腹泻病毒混合感染的病原诊断   总被引:1,自引:1,他引:0  
对我省流行的疑似猪病毒性腹泻进行了病原诊断,通过细菌培养、RNA电泳和电镜形态观察等辅助诊断和免疫萤光特异性诊断,确诊该病病原为猪传染性胃肠炎病毒(TGEV)与猪流行性腹泻病毒(PEDV)的混合感染,混合毒代号为TPV3。  相似文献   

2.
水貂阿留申病的直接电镜和免疫电镜检查   总被引:1,自引:0,他引:1  
采用直接镜(DTEM)和胶体金免疫电镜(IEM-G)技术对疑为水貂阿留申病的貂病科进行快速检测。结果前者杂质较多,呈像不清晰;后者则简单快速,敏感特异,而且可以对病毒在细胞内进行定位,较对流免疫电泳法易于推广与应用。  相似文献   

3.
本研究主要对猪生殖呼吸道综合征( P R R S) 国内分离毒株( C H Ia) 进行了病毒纯化及其结构蛋白的分析。选用聚乙二醇( P E G6000) 沉淀和差速离心法粗提了经 Marc145 细胞系增殖的猪生殖呼吸道综合征病毒( P R R S V) 。并采用非线性蔗糖密度梯度离心法纯化了 P R R S V, 经免疫电镜观察纯化病毒, 发现有较多的胶体金颗粒吸附在直径为42 ~78nm 的病毒粒子周围。经 Dot E L I S A 测定纯化病毒的滴度可达1 1600 以上, 并利用 S D S P A G E 和 Westernblot 两种方法对国内分离毒株( C H Ia) 与欧洲型( Lelystad) 、美洲型( V R2332) 等参考毒株的病毒结构蛋白组成和部分抗原特性进行了初步的研究。测得国内分离毒株主要结构蛋白的分子量为145 K D,192 K D 和263 K D, 并均能被 P R R S V 的高免血清识别, 这与国外的同类报道很相似。  相似文献   

4.
应用胶体金免疫电镜技术检测鸭肝炎病毒   总被引:17,自引:1,他引:16  
本研究应用胶体金免疫电镜技术和直接电镜(DEM)、免疫电镜(IEM)比较观察了鸭肝炎病毒(DHV)QL_79弱毒株和R_85952标准强毒株。QL_79株和R_85952株的形态结构是一致的,球形,大小为20~40nm。胶体金免疫电镜技术可作为检测DHV的常规方法,具有简便、快速、灵敏、直观等特点。  相似文献   

5.
本研究主要对猪生殖-呼吸道综合征国内分离毒株进行了病毒纯化及其结构蛋白的分析。选用聚乙二醇(PEG-6000)沉淀和差速离心法粗提了经Marc-145细胞系增殖的猪生殖-呼吸道综合征病毒(PRRSV)。并采用非线性蔗糖密度梯度离心法纯化了PRRSV,经免疫电镜观察化病毒,发现有较多的胶体金颗粒吸附在直径为42-78nm的病毒粒子周围。经Dot-ELISA测定纯化病毒的滴度可达1:1600以上,并利  相似文献   

6.
通过转瓶培养IBRS2细胞,选择最佳接毒剂量、接毒时间和收毒时间生产出凝集价(HA)达212的猪传染性胃肠炎病毒(TGEV)血凝抗原。用抗TGEVS蛋白和 M蛋白的单克隆抗体与不同稀释度的TGEV血凝抗原等量混合,在 37℃作用 30分钟后接种IBRS2细胞和做中和试验(NT)和血凝抑制(HI)试验。结果表明TGEV血凝位点与中和位点一致,血凝素位于S蛋白A位点或其附近。  相似文献   

7.
5只HVT免疫鸡,实验感染MDV后的第1~10周期间,分别采用初次细胞分离培养物上清中的自由病毒粒子鉴定,dot-blotDNA杂交和常规AGP试验等方法,对并发感染鸡羽毛根进行了病毒及病毒抗原的动态检测与比较。结果显示,在上述羽毛根中可同时存在HVT粒子和MDVDNA。HVT可分离时间为MDV攻毒后1~7周;MDVDNA最早检出时间为MDV攻毒后的第18~22天,并达到其持续性(22~70d)的检出率最高峰(100%);而AGP法对此期间鸡只羽毛根MDV抗原的最早检出时间在第22天,且检出率很低。因此,羽毛病毒抗原AGP检测法,对免疫鸡只或鸡群MDV感染的诊断仍然是特异的,但较单纯感染的检测,其检出率更低,因而更难以反映出免疫鸡群中MDV感染的真实状况。  相似文献   

8.
仔猪四大细菌性腹泻病原的鉴别诊断孔繁德厦门动植物检疫局陈琼厦门市家畜检疫站在仔猪腹泻病原中,除传染性胃肠炎病毒(TGEV)、轮状病毒(RV)和流行性腹泻病毒(PEDV)3大病毒外,还有大肠杆菌(SC)、C型魏氏梭菌(CEI)、痢疾密螺旋体(SD)沙门...  相似文献   

9.
构建了表达了传染性法氏囊病病毒(IBDV)VP2的两种火鸡疱疹病毒(HVT)重组体vHVT001和vHVT002。用其接种1日龄雏鸡以评价它们对IBDV52/70株和马立克氏病病毒(MDV)RB1B株攻击的保护效果。在IBDV攻击中,vHVT002免疫鸡能预防死亡和法氏囊肉眼病变,具有良好的保护力,以10^5PFU免疫能达100%、10^4PFU免疫能达60%保护,而用vHVT001免疫只获得较低  相似文献   

10.
猪细小病毒生物学特性研究   总被引:2,自引:0,他引:2  
应用PK-15传代细胞复制猪细小病毒(PPV)参考株NADL-2和云南分离株KM,研究得出细胞培养物半数细胞感染量分别为10^-7.9/ml和10^-6.8/ml经CsCl密度梯度离心,两种病毒颗粒其浮力密度值分别为1.33g/cm^3和1.39/cm,电镜观察病毒粒子呈圆形,直径约20nm。SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE)分析,表明纯化的PPV细胞培养毒,主要含两种蛋白成分,分子量  相似文献   

11.
: Some feed ingredients bind more acid in the stomach than others and for this reason may be best omitted from pig starter foods if gastric acidity is to be promoted. The objective of this study was to measure the acid-binding capacity (ABC) of ingredients commonly used in pig starter foods. Ingredients were categorised as follows: (i) milk products (n = 6), (ii) cereals (n = 10), (iii) root and pulp products (n = 5), (iv) vegetable proteins (n = 11), (v) meat and fish meal (n = 2), (vi) medication (n = 3), (vii) amino acids (n = 4), (viii) minerals (n = 16), (ix) acid salts (n = 4), (x) acids (n = 10). A 0.5 g sample of food was suspended in 50 ml distilled de-ionised water with continuous stirring. This suspension was titrated with 0.1 mol/L HCl or 0.1 mol/L NaOH so that approximately 10 additions of titrant was required to reach pH 3.0. The pH readings after each addition were recorded following equilibration for three minutes. ABC was calculated as the amount of acid in milliequivalents (meq) required to lower the pH of 1 kg food to (a) pH 4.0 (ABC-4) and (b) pH 3.0 (ABC-3). Categories of food had significantly different (P < 0.01) ABC values. Mean ABC-4 and ABC-3 values of the ten categories were: (i) 623 (s.d. 367.0) and 936 (s.d. 460.2), (ii) 142 (s.d. 79.2) and 324 (s.d. 146.4), (iii) 368 (s.d. 65.3) and 804 (s.d. 126.7), (iv) 381 (s.d. 186.1) and 746 (s.d. 227.0), (v) 749 (s.d. 211.6) and 1508 (s.d. 360.8), (vi) 120 (s.d. 95.6) and 261 (s.d. 163.2), (vii) 177 (s.d. 60.7) and 1078 (s.d. 359.0), (viii) 5064 (s.d. 5525.1) and 7051 (s.d. 5911.6), (ix) 5057 (s.d. 1336.6) and 8945 (s.d. 2654.1) and (x) -5883 (s.d. 4220.5) and -2591 (s.d. 2245.4) meq HCl per kg, respectively. Within category, ABC-3 and ABC- 4 values were highly correlated: R2 values of 0.80 and greater for food categories i, iv, v, vi, vii and viii. The correlation between predicted and observed ABC values of 34 mixed diets was 0.83 for ABC-4 and 0.71 for ABC-3. It was concluded that complete diets with low ABC values may be formulated through careful selection of ingredients. The final pH to which ABC is measured should matter little as ABC-3 and ABC-4 are highly correlated.  相似文献   

12.
青海可可西里国家自然保护区草地牧草营养成分测定   总被引:10,自引:1,他引:9  
测定了可可西里国家级自然保护区内紫花针茅草地型和高山嵩草草地型牧草,冷季9月份和4月份营养成分。结果表明,各种牧草营养成分含量随种类不同和生长季节迁移而呈现一定差异;9月份两类草地型牧草DM,CP,EE,NDF,ADF,ADL,Ash,Ca和P平均含量分别为92.20%和90.42%,5.40%和5.98%,2.90%和3.06%,48.30%和44.3%,41.40%和34.36%,3.68%和6.52%,18.85%和8.28%,1.43%和1.25%,0.38%和0.47%;4月份两类草地型牧草DM,CP,EE,NDF,ADF,ADL,Ash,Ca和P平均含量分别为94.33%和93.75%,3.69%和5.85%,1.52%和2.32%,66.82%和61.88%,47.14%和43.32%,9.14%和8.53%,13.48%和13.47%,1.38%和1.16%,0.38%和0.36%;紫花针茅草地型和高山嵩草草地型牧草CP平均含量9月份较4月份分别高出46.8%和35.5%,NDF,ADF和ADL分别降低了27.71%和28.41%,11.95%和20.68%,59.63%和23.33%;就营养品质而言,高山嵩草草地型牧草优于紫花针茅草地型牧草。  相似文献   

13.
Ivermectin (IVM- Eqvalan paste, 1.87%) and doramectin (DRM-Dectomax 1%) were each administered orally to donkeys at 200 microgkg(-1) bodyweight. Blood and faecal samples were collected at predetermined times over 30 days and plasma pharmacokinetics and faecal excretion determined. Maximum plasma concentrations (C(max)) of IVM (23.6 ngml(-1)) and DRM (33.9 ngml(-1)) were obtained at (t(max)) 19.2 and 24h, respectively. The area under the concentration curve (AUC) of DRM (228.9 ngdayml(-1)) was significantly larger than that of IVM (119.3 ngdayml(-1)) and mean residence time (MRT) was 6.5 days for IVM and 9.1days for DRM. The highest (dry weight) faecal concentrations (9.33 microgg(-1) - IVM, 12.12 microgg(-1) - DRM) were detected at 55.9 and 48.0 h, respectively and each compound was detected (0.05 microgg(-1)) in faeces between 11h and 9 days following oral administration in donkeys.  相似文献   

14.
The pharmacokinetics of marbofloxacin were investigated in healthy (n=8) and Mannheimia haemolytica naturally infected (n=8) Simmental ruminant calves following intravenous (i.v.) and intramuscular (i.m.) administration of 2 mg kg(-1) body weight. The concentration of marbofloxacin in plasma was measured using high performance liquid chromatography with ultraviolet detection. Following i.v. administration of the drug, the elimination half-life (t(1/2 beta)) and mean residence time (MRT) were significantly longer in diseased calves (8.2h; 11.13 h) than in healthy ones (4.6 h; 6.1 h), respectively. The value of total body clearance (CL(B)) was larger in healthy calves (3 ml min(-1) kg(-1)) than in diseased ones (1.3 ml min(-1) kg(-1)). After single intramuscular (i.m.) administration of the drug, the elimination half-life, mean residence time (MRT) and maximum plasma concentration (C(max)) were higher in diseased calves (8.0, 12 h, 2.32 microg ml(-1)) than in healthy ones (4.7, 7.4 h, 1.4 microg ml(-1)), respectively. The plasma concentrations and AUC following administration of the drug by both routes were significantly higher in diseased calves than in healthy ones. Protein binding of Marbofloxacin was not significantly different in healthy and diseased calves. The mean value for MIC of marbofloxacin for M. haemolytica was 0.1+/-0.06 microg ml(-1). The C(max)/MIC and AUC(24)/MIC ratios were significantly higher in diseased calves (13.0-64.4 and 125-618 h) than in healthy calves (8-38.33 and 66.34-328 h). The obtained results for surrogate markers of antimicrobial activity (C(max)/MIC, AUC/MIC and T > or = MIC) indicate the excellent pharmacodynamic characteristics of the drug in diseased calves with M. haemolytica, which can be expected to optimize the clinical efficacy and minimize the development of resistance.  相似文献   

15.
为探讨伊氏锥虫对安锥赛抗药性的分子机理,以布氏锥虫对砷剂药物抗药性相关的TbTA1基因设计引物,以55℃、57℃、60℃、63℃和65℃不同退火温度,分别从伊氏锥虫敏感株的cDNA和基因组DNA中扩增出TbTA1基因的全长序列,但是从安锥赛抗药株伊氏锥虫的cDNA和基因组DNA中都未扩增出TbTA1基因,这表明基因TbTA1可能与伊氏锥虫安锥赛抗药性的产生有关。伊氏锥虫与布氏锥虫的,TbTA1基因序列比较,它们有10个碱基不同,即第88位的G(T.e)-A(T.b)、第144位的T(T.e)-C(T.b)、第224位的C(T.e)-T(T.b)、第471位的C(T.e)-T(T.b)、第472位的A(T.e)-G(T.b)、第549位的G(T.e)-T(T.b)、第1008位的C(T.e)-T(T.b)、第1033位的A(T.e)-G(T.b)、第1293位的A(T.e)-G(T.b)和第1384位的T(T.e)-C(T.b),其中有5个碱基所编码的氨基酸不同,即Val^30(T.e)Ile(T.b)、Ala^75(T.e)-Val(T.b)、Ile^158(T.e)-Val(T.b)、Thr^345(T.e)-Ala(T.b)和Ser^462(T.e)-Pro(T.b),这表明伊氏锥虫与布氏锥虫的TbTA1差异可能是它们的种间差异。  相似文献   

16.
为研究上海水牛生理生化指标含量,选取精神良好、健康的上海水牛犊牛(1岁内)、青年牛(1-2岁)、成年牛(3岁以上),测定了生理指标、血液生理生化指标含量。结果显示,上海水牛的体重随月龄的增加显著增加(P<0.05),而呼吸频率、心率无显著差异(P>0.05)。在检测的22项血液生理指标含量中,有10项指标(平均红细胞体积(MCV)、平均红细胞血红蛋白含量(MCH)、平均红细胞血红蛋白浓度(MCHC)、红细胞分布宽度(RDW)、淋巴细胞百分比(%LYM)、单核细胞百分比(%MONO)、中性粒细胞百分比(%NEU)、嗜酸性粒细胞百分比(%EOS)、淋巴细胞(LYM)、单核细胞(MONO))含量差异显著(P<0.05),其余12项指标(红细胞(RBC)、红细胞比容(HCT)、血红蛋白(HGB)、网织红细胞百分比(%RETIC)、网织红细胞(RETIC)、白细胞(WBC)、嗜碱性粒细胞百分比(%BASO)、中性粒细胞(NEU)、嗜酸性粒细胞(EOS)、嗜碱性粒细胞(BASO)、血小板(PLT)、血小板压积(PCT))含量差异不显著(P>0.05)。在检测的18项血液生化指标含量中,有9项指标(血糖(GLU)、肌酐(CREA)、磷离子(PHOS)、钙离子(Ca)、总蛋白(TP)、球蛋白(GLOB)、丙氨酸转氨酶(ALT)、胆固醇(CHOL)、胰淀粉酶(AMYL))含量差异显著(P<0.05),其余9项指标(尿素(UREA)、血尿素氮/肌酐比(BUN/CREA)、白蛋白(ALB)、白蛋白/球蛋白比(ALB/GLOB)、碱性磷酸酶(ALKP)、谷氨酰转移酶(GGT)、总胆红素(TBIL)、甘油三酯(TRIG)、脂肪酶(LIPA))含量差异不显著(P>0.05)。该研究可为上海水牛的选种选育、生长发育评估、营养状况评估、疾病诊断等提供参考。  相似文献   

17.
Pharmacokinetics of enrofloxacin in lactating sheep   总被引:4,自引:0,他引:4  
The pharmacokinetics of enrofloxacin (ENR) was investigated after its intravenous (iv) and intramuscular (im) administration in six healthy lactating sheep. After iv ENR injection (as a bolus), the elimination half-life (t(1/2beta)), the volume of distribution (Vd(area)), and the area under the concentration vs. time curve (AUC) were 3.30 (0.36)h, 2.91 (0.17)l/kg and 4.19 (0.18) microg h/ml, respectively. The maximum milk concentrations of ENR (C(max)), the area under the milk concentration vs. time curve (AUC(milk)) and the ratio AUC(milk)/AUC(serum) were 2.38 (0.14)microg/ml, 23.76 (2.21) microg h/ml and 5.62 (0.30), respectively. After im administration of ENR the t(1/2beta), C(max), time of C(max) (t(max)) and absolute bioavailability (F(abs)) were 3.87 (0.10)h, 0.74 (0.07) microg/ml, 0.83 (0.12)h and 75.35%, respectively. The C(max), AUC(milk) and the ratio AUC(milk)/AUC(serum) were 1.94 (0.13) microg/ml, 24.81 (2.25) microg h/ml and 8.15 (0.96), respectively.  相似文献   

18.
19.
采用360只1日龄Avian肉公雏,研究日粮中添加相同毫克当量(179meq/kg)的阴阳离子对21日龄肉仔鸡血液酸碱平衡和胫骨软骨发育不良(TD)的影响。阳离子分别为钙(127%)、钠(062%)、钾(151%)和镁(039%);阴离子分别为氯(092%),磷(080%)和硫(065%)。高氯、磷、硫均不同程度地诱发TD的发生,而添加阳离子将TD的发生率降至为零。添加阴离子显著降低了21日龄肉仔鸡的体增重、血液的碱贮和碱超(P<001)、红细胞平均血红蛋白浓度(MCHC)、血清羟脯氨酸含量以及胫骨重量、长度和皮质层厚度(P<005),血液pH值、血红蛋白含量和红细胞压积也有下降的趋势,从而酸化了血液,损害了血氧运输效率和软骨胶原降解,影响到胫骨生长发育。阳离子则增加了21日龄肉仔鸡血液碱贮和碱超(P<001),降低了体增重和胫骨重量(P<005)。试验结果表明,日粮电解质平衡可能通过改变血液酸碱平衡,影响血氧运输效率和软骨胶原降解代谢及其它多方面机制诱导或制约TD的发生。  相似文献   

20.
氨基酸生物配比与遗传密码关联的研究   总被引:1,自引:0,他引:1  
研究遗传密友与氨基酸生物配比之关联表明,具有相同同义密友子数的氨基酸BFAA之均数与其氨基酸平均分子量和密码子抽样概率均数之关系模型为Px=K/mxexp(2/Rx)+a,其中k和a均为常数。依据概率事件的运算法则,可用4种核苷的抽样概率来估计Rx值,当用x代替Rx时,模型的估计精度不变。  相似文献   

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