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1.
抑制素免疫山羊卵巢对外源性促性腺激素的反应   总被引：2，自引：0，他引：2  
用重组绵羊抑制素α亚单位在不发情季节主动免疫 4 0只波尔山羊。免疫前和免疫后用马的绒毛膜促性腺激素 (eCG)或猪的卵泡刺激素 (pFSH)处理。排卵通过超声波检测 ,胚胎用非手术法回收。试验结果表明 ,抑制素主动免疫能引起山羊超数排卵。  相似文献   

2.
用重组绵羊抑制素α亚单位在不发情季节主动免疫40只波尔山羊。免疫前和免疫后用马的绒毛膜促性腺激素(eCG)或猪的卵泡刺激素(pFSH)处理。排卵通过超声波检测,胚胎用非手术法回收。试验结果表明,抑制素主动免疫能引起山羊超数排卵。  相似文献   

3.
用重组绵羊抑制素α亚单位在不发情季节主动免疫40只波尔山羊。免疫前和免疫后用马的绒毛膜促性腺激素(eCG)或猪的卵泡刺激素(pFSH)处理。排卵通过超声波检测，胚胎用非手术法回收。试验结果表明，抑制素主动免疫能引起山羊超数排卵。  相似文献   

4.
抑制素被动免疫对黄体中期山羊生殖激素分泌的影响   总被引：6，自引：0，他引：6  
为了探讨抑制素在山羊生殖激素分泌调节中的作用 ,本试验用抗抑制素血清对黄体中期雌山羊进行了被动免疫试验。将酪 30 -抑制素 α(1,30 ) NH2 与兔血清白蛋白螯合 ,用去势雄山羊制备抗抑制素血清 (INH- AS) ,最终滴度为 1∶96 0 0 0。对照血清来自牛血清白蛋白免疫的去势雄山羊。 12只黄体期日本 SHIBA山羊 ,肌注 PGF2α(2 mg/只 )进行同期发情处理 ,处理后 3～ 5 d母羊出现发情。在发情后 10 d(发情当天为 0 d) ,将母羊分为 2组 ,每组 6只。试验组颈静脉注射 INH- AS(2 0 m L /只 ) ,并在注射前 (0 h)和注射后 6、12、2 4、4 8、72、96、12 0 h采取外周血样 (肝素抗凝 ) ;对照组注射对照血清 (2 0 m L/只 )。抗凝血样离心 (4℃、170× g、15 min)分离血清 ,- 2 0℃保存待测。血清 FSH和 L H含量用NIDDK放免试剂盒测定 ,其中 FSH标记纯品为 NIDDK- o FSH- I- 1,标准品为 NIDDK- o FSH- RO- 1,一抗为 NIDDK-抗- o FSH- 1;L H标记纯品为 NIDDK- o L H- I- 3,标准品为 NIDDK- o L H- RP- 2 4 ,一抗为抗 - o L H- YM。二抗为山羊抗家兔Ig G。血清 E2 和 P含量用1 2 5I放免盒测定。测 E2 时 ,为除去游离脂肪 ,样品用 0 .5 m L乙腈 +2 m L乙烷处理。试验结果表明 ,注射 INH- AS后 12 h,血清 FSH含量显著提高  相似文献   

5.
抑制素(IB)主动免疫对牛超排效果的影响及机制   总被引：8，自引：1，他引：7  
用猪精液抑制素 ( inhibin,IB)抗原主动免疫供体母牛 ,结合外源纯化 FSH超排处理 ,观察了抑制素主动免疫对牛超排效果的影响 ,并通过检测不同生理时期血液中相关生殖激素的水平 ,探讨了抑制素免疫影响牛超排效果的机制。选产后 50 d以上的 3～ 5岁荷斯坦母牛 1 2头和西杂青年母牛 1 2头 ,按其发情顺序随机分为试验组和对照组 ,每组 1 2头。试验组用完全福氏佐剂乳化的 IB抗原进行首免 ,间隔 2 0 d再用不完全福氏佐剂乳化的 IB抗原加免 1次 ,加免后 6 d开始采用纯化 FSH做超排处理 ,观察发情 ,适时进行配种 ,于配种后 7d进行非手术法采卵。对照组只是用纯化 FSH做超排处理。参试牛于不同生理时期颈静脉采血 ,分离血清 ,用放免法测定各生理时期血清中 FSH、LH、E2 、P4水平。结果表明 :( 1 )抑制素主动免疫可以提高牛超排效果 ,试验组头均胚胎数和头均可用胚胎数分别比对照组增加 2 .4枚和 1 .4枚 ( P<0 .0 5) ;( 2 )抑制素主动免疫可提高母牛血浆中 FSH水平 ,从而促使卵泡发育 ,增加胚胎数和可用胚胎数 ;( 3)在首免后到加免前 ,抑制素主动免疫对 LH、E2 、P4基础分泌基本无影响  相似文献   

6.
文章利用卵泡抑制素主动免疫萨福克成年母羊,以期提高其繁殖效率.结果表明:抑制素3次免疫后,血清中抑制素抗体逐步上升,FSH水平也随着免疫过程逐步提高.试验组黄体数、卵巢活性及3～5mm卵泡数显著高于对照组组,试验组可以引起加倍排卵.  相似文献   

7.
山羊由于放牧游走,发情不易被察觉。人工授精时机掌握不好不易受孕,现将羊人工授精技术要点简介如下,供参考。1 发情周期及排卵时间 (1)羊一般从秋季开始发情,到深冬停止,所以秋末冬初是发情旺季。其发情周期一般为21天,发情持续期为1-2天。(2)母羊的排卵时间是在发情持续期快结束时,所以刚开始发情时不宜配种。精卵结合是在输卵管前三分之一段,  相似文献   

8.
人抑制素主动免疫对母鸡产蛋和内分泌的影响   总被引：9，自引：0，他引：9  
本文报道了主动免疫抑制素对母鸡卵泡发育、排卵率和外周E2 和P的影响。用人工合成人抑制素α亚基 ( 1 -2 6Tyr.Gly)片断与KLH连接作免疫原 ,免疫 8只母鸡 ,1 2只作对照 ,观察其产蛋率的变化、卵巢卵泡的发育 ;用放免法测定排卵周期中外周E2 和P。免疫组产蛋率比对照组高 (P <0 0 5) ,卵巢上≥ 1 0mm的卵泡数无显著差异 ,但白泡、小黄泡数差异较大。第 3、4、5次免疫后产蛋率显著提高 ,但在实验期抑制素免疫对蛋重没有影响。用放免法测定发现处理组外周基础水平的雌二醇比对照组上升  相似文献   

9.
抑制素主动免疫对山羊繁殖率的影响   总被引：4，自引：0，他引：4  
选用８只母山羊随机分成两组,试验组用卵巢抑制素与血清蛋白偶合物进行主动免疫,探讨免疫对排卵率和血浆ＦＳＨ水平的影响。结果显示,试验组山羊的抗体效价分别为１：１２８、１：６４、１：３２和１：３２,且卵巢黄体数显著高于对照组（Ｐ〈０．０５）,ＦＳＨ平均水平极显著高于对照组（Ｐ〈０．０１）。这表明,抑制素主动免疫能够引起血浆ＦＳＨ水平的升高,提高排卵率,可以改善母山羊的繁殖性能。  相似文献   

10.
大足黑山羊卵泡发育与内分泌激素分析   总被引：1，自引：0，他引：1  
从大足黑山羊核心保种场选择年龄3～4岁、体重25～40 kg、健康未孕的成年母羊20只,用化学发光和酶联免疫方法分别测定发情期和排卵后募集阶段血浆中FSH 和抑制素水平,用HS-2000兽用B超,频率为7.5MHz线阵探头做直肠探察,连续观察20只大足黑山羊2个完整发情周期内卵巢卵泡发育情况.结果表明,大足黑山羊排卵后募集期血浆中FSH水平和抑制素水平显著高于发情期水平(P＜0.05,n=15).卵泡募集数从15个增加到18个时,FSH水平逐渐升高(P＜0.05,n=15),抑制素水平逐渐下降(P＜0.05,n=15).排卵数从1个增加到4个时,FSH水平逐渐升高(P＜0.05,n=15),抑制素水平逐渐下降(P＜0.05,n=15).3波周期第一波募集阶段FSH水平比4波周期FSH水平低(P＜0.05,n=15),3 波周期第一波募集阶段抑制素水平比4波周期抑制素水平高,但差异不显著(P＞0.05,n=15).  相似文献   

11.
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   

12.
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   

13.
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   

14.
Tropical Animal Health and Production -  相似文献   

15.
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.  相似文献   

16.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.  相似文献   

17.
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   

18.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

19.
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed.  相似文献   

20.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

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