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1.
采用新城疫(ND)、克隆-30株,传染性法氏囊病(IBD)CT株的含毒鸡胚胚体和尿囊液研制成二联活疫苗.用10个免疫剂量ND、IBD二联活疫苗免疫7～10日龄雏鸡,不引起ND和IBD临床症状,说明该苗安全可靠.ND、IBD二联活疫苗与ND、IBD单苗免疫对比试验,测定血清抗体结果,无显著差异,接种7～10日龄鸡,7天产生免疫力,14～21天达到高峰,一次免疫,免疫期2个月,保护率95%以上,从而能产生注射一次疫苗起到一针同时能防两种传染病,减少运输成本和应激的效果.现地应用已逾2亿羽份,获得良好的效果.  相似文献   

2.
本产品用新城疫(ND)克隆-30株，用10个免疫剂量ND-克隆-30活疫苗免疫7～10日龄雏鸡，不引起ND临床症状，说明该苗安全可靠。接种7～10日龄鸡，7天产生免疫力，14～21d达到高峰，一次免疫，免疫期2个月，保护率95％以上，现地应用已逾2亿羽份，获得良好的效果。  相似文献   

3.
左旋咪唑增强鸡新城疫疫苗免疫效果的观察   总被引：3，自引：0，他引：3  
本文报道了左旋咪唑对鸡新城疫病疫苗免疫效果的影响。进行了两个实验：每个实验分为10毫克／千克，左旋咪唑给药组和空白对照组。实验一观察对鸡ND疫苗初次免疫的影响：疫苗免疫前用药，5日龄时给药，连用3天，7日龄滴鼻给予ND－Lasota系疫苗；疫苗免疫后用药，7日龄时滴鼻给予ND－Lasota系活疫苗，13日龄时给药，连用3天。实验二观察对鸡ND疫苗二次免疫的影响：7日龄时饮水给予ND＋IBD联活疫苗，40日龄时给药，连用3天，42日龄时肌肉注射ND－Lasota系疫苗。实验一结果显示，免疫前用药，10mg/kg左旋咪唑用药组，首次免疫后7－21d，抗体滴度与未用药对照组比较无明显差别，但28d抗体滴度明显高于未用药对照组；免疫后用药，用药后21d,10mg/kg左旋咪唑用药组，抗体滴度明显高于空白对照组。实验二结果显示10mg/kg左旋咪唑用药组，疫苗二次免疫后7－28d，抗体滴度明显高于未用药对照组。  相似文献   

4.
本文报道了左旋咪唑对鸡新城疫病疫苗免疫效果的影响。进行了两个实验:每个实验分为10毫克/千克,左旋咪唑给药组和空白对照组。实验一观察对鸡ND疫苗初次免疫的影响:疫苗免疫前用药,5日龄时给药,连用3天,7日龄滴鼻给予ND—Lasota系疫苗;疫苗免疫后用药,7日龄时滴鼻给予ND—Lasota系活疫苗,13日龄时给药,连用3天。实验二观察对鸡ND疫苗二次免疫的影响:7日龄时饮水给予ND+IBD二联活疫苗,40日龄时给药,连用3天,42日龄时肌肉注射ND—Lasota系疫苗。实验一结果显示,免疫前用药,10mg/kg左旋咪唑用药组,首次免疫后7～21d,抗体滴度与未用药对照组比较无明显差别,但28d抗体滴度明显高于未用药对照组;免疫后用药,用药后21d,10mg/kg左旋咪唑用药组,抗体滴度明显高于空白对照组。实验二结果显示10mg/kg左旋咪唑用药组,疫苗二次免疫后7～28d,抗体滴度明显高于未用药对照组。  相似文献   

5.
为评估鸡新城疫（ND）-传染性支气管炎（IB）-传染性法氏囊病（IBD）三联灭活疫苗对不同日龄和不同水平母源抗体雏鸡的免疫效力和持续期,本试验用该疫苗免疫7、14、21日龄SPF雏鸡和有母源抗体的普通雏鸡,免疫后采血测定ND血凝抑制抗体（HI Ab）、IB血凝抑制抗体（HI Ab）及IBD中和抗体（NA）,并用传染性法氏囊病病毒（IBDV）强毒攻击。结果显示,7日龄SPF雏鸡免疫后21 d ND HI抗体、IB HI抗体及IBD中和抗体效价分别为7.9log2、6.9log2和14.1log2,SPF鸡日龄越大,抗体水平越高;28日龄SPF鸡免疫后3个月,0.3 mL免疫剂量组试验鸡ND HI、IB HI及IBD中和抗体效价分别达6.5log2、6.1log2和13.6log2,IBDV攻毒保护率均为100%（10/10）;不同日龄普通雏鸡免疫效果与SPF鸡试验一致,抗体水平随鸡日龄增大而升高,IBD攻毒保护率也都达到100%（10/10）。试验结果证实,鸡新城疫-传染性支气管炎-传染性法氏囊病三联灭活疫苗可使7、14及21日龄SPF雏鸡和普通雏鸡产生良好的免疫力,对雏鸡的免疫期至少为3个月。  相似文献   

6.
新城疫与禽流感(H9亚型)二联油乳剂灭活苗免疫效力试验   总被引：1，自引：1，他引：0  
用新城疫病毒（NDV）LaSota株与禽流感病毒（AIV）F株尿囊腔接种非免疫难胚，取72－120小时死亡鸡胚液。灭活后分别制成新城疫油乳剂灭活苗、禽流感（H9亚型）油乳剂灭活苗、新城疫与禽流感（H9亚型）二联油乳剂灭活苗，免疫7日龄非免疫雏鸡，一周后开始检测ND、AI血凝抑制（HI）抗体体，两周时各免疫组鸡的抗体效价都达到6log2以上，3周达到高峰，后维持在较高水平达45天以上，在65日龄进行攻毒，结果单苗和二联苗免疫鸡全部得到保护。  相似文献   

7.
从5种保护剂配方中筛选出满足需要的鸡新城疫(LaSota株)、腔上囊(NF8株)二联活疫苗的耐热保护剂配方,该二联耐热活疫苗能在2℃8℃条件下保存21个月,通过进行二联耐热活疫苗与单苗的免疫效果比较试验研究二联苗中两种病原是否会产生相互影响。结果表明,用二联活疫苗免疫SPF雏鸡后,NF8株与LaSota株之间不产生明显的相互干扰作用,攻毒保护率与各自单苗相比无明显差异,并且该二联耐热活疫苗免疫7 d后即对免疫鸡群产生保护,此时的抗体水平分别为(ND HI为4)和(IBD SD为320)。综上所述,该二联耐热活疫苗对免疫鸡群有很好的免疫保护效果,此种多联疫苗的产生对控制禽类多种疾病以及降低疫苗冷链运输成本具有非常重要的意义。  相似文献   

8.
鸡新城疫(ND) La Sota、传染性支气管炎(IB) H120和传染性法氏囊病(IBD) B87弱毒株适当稀释后等量混合,经10日龄SPF鸡胚同胚接种联合培养,收获含毒鸡胚液和胎儿混合制成ND、IB、IBD三联活疫苗。接种7~14日龄SPF雏鸡7 d产生抗体,14~21d达到高峰,免疫期70 d以上,与单苗同步免疫并攻击强毒,试验结果无显著性差异。以10个使用剂量免疫SPF雏鸡,无ND、IB、IBD临床症状和剖检病变,其安全性和效力检验均达到相应单苗的标准要求。  相似文献   

9.
为了比较不同B87疫苗对文昌鸡免疫效果的影响,试验选择文昌鸡250只,随机分成5组,1,2,3,4组为免疫组,5组为健康对照组,1,2,3,4组于7日龄分别免疫A、B、C、C鸡传染性法氏囊疫苗,其中4组于14日龄时再次免疫鸡传染性法氏囊疫苗;1,2,3组和5组每组选取10只鸡于8日龄免疫鸡新城疫-传染性支气管炎二联活疫苗。于免疫后第7,14,21,28,45,60,90,120天采血,测定鸡传染性法氏囊病(IBD)抗体水平;免疫后第14,21,28,45天采血测定新城疫(ND)抗体水平;免疫后第28,45天计算各组的囊体比。结果表明:A疫苗的抗体水平较理想,二次免疫效果明显优于一次免疫;从新城疫的免疫效果来看,不同公司的B87疫苗对文昌鸡的法氏囊存在不同程度的影响,可为鸡传染性法氏囊病的疫苗选择提供参考。  相似文献   

10.
将5000余只7日龄地方麻鸡随机分为2组,第一组肌肉注射山东泰丰生物制品公司生产的鸡新城疫(La Sota株)灭活苗0.25ml,同时滴鼻点眼鸡新城疫(La Sota株)一鸡传染性支气管(H120)二联冻干活疫苗各两滴;第二组只滴鼻点眼鸡新城疫(La sota株)一鸡传染性支气管(H120)二联冻干活疫苗各两滴,定期进行ND抗体检测.结果表明,第一组接种疫苗7d后产生ND抗体滴度为4.6log2,14d可达到高峰(9.6log2);整个试验期间第一组试验鸡免疫后所产生的ND抗体效价普遍高于第二组,抗体水平持续期较长,到175d时仍然能达到7.62log2.  相似文献   

11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。  相似文献   

12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.  相似文献   

13.
Tropical Animal Health and Production -  相似文献   

14.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

15.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

16.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

17.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

18.
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.  相似文献   

19.
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors.  相似文献   

20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems.  相似文献   

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