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1.
利用屠宰场采集的绵羊卵巢作为试验材料,研究了不同卵母细胞采集方法(卵泡冲洗法、剖切法、注射器抽吸法和真空泵抽吸法)、成熟液中添加不同来源激素(BIONICHE或宁波激素厂生产 FSH/LH)和血清(发情绵羊血清或胎牛血清),以及mSOF和mCR胚胎培养体系对绵羊体外受精各环节效率的影响。结果表明,卵泡冲洗法获得A、B两级卵母细胞比例为77.1%,显著高于其他3种方法(P＜0.05),添加BIONICHE FSH/LH+ESS成熟液中,卵母细胞成熟率显著高于其他添加方式(P＜0.05),mSOF和mCR胚胎培养体系在卵裂率上无显著差异(P＞0.05),但mSOF组中囊胚率和孵化率均显著高于mCR组(P＜0.05)。综上所述,本研究中卵泡冲洗法更适合绵羊卵母细胞采集,成熟液中添加BIONICHE FSH/LH和ESS可显著促进绵羊卵母细胞成熟;与mCR培养体系相比,mSOF培养体系更适合绵羊体外受精胚胎的发育。  相似文献   

2.
本试验探讨了不同培养体系对金华猪卵母细胞体外成熟的影响,共进行了4组试验。结果表明,试验组4,采用TCMl99作为体外成熟基础培养液,添加10 IU/mL促卵泡素(FSH)、10 IU/mL促黄体素(LH)、10%卵泡液(PFF)、10%血清,在成熟率上均显著高于其他试验组(P0.05),但添加10%发情金华猪血清或10%胎牛血清,对卵母细胞的成熟率无显著差异(P0.05)。说明金华猪卵母细胞在体外成熟培养时加入血清,能够促进卵母细胞的体外成熟率。  相似文献   

3.
研究了不同成熟培养时间（21、242、7 h）、FSH剂量（0、0.02、0.04、0.06 AU/mL）和激素组合（FSH＋LH＋E2、FSH＋LH、LH＋E2、FSH＋E2）、氨基酸以及负压低氧条件（-300 mmHg2、%CO28、%～10%O2）对山羊卵母细胞体外成熟/体外受精（IVM/IVF）的影响。结果表明：山羊卵母细胞成熟培养以24～27 h较为适宜;添加FSH组的受精卵裂率显著高于未添加组（P〈0.01）,添加剂量以0.02～0.04 AU/mL效果为最佳;LH对山羊的IVM/IVF无显著影响;E2添加对山羊IVM/IVF有负面影响,使囊胚发育率显著降低（P〈0.05）。在成熟液中添加必需氨基酸（EAA）和非必需氨基酸（NEAA）均能显著提高受精卵裂率（P〈0.05）。负压低氧环境对山羊卵母细胞的体外成熟无显著影响,但是不利于山羊的体外受精,使受精卵裂率极显著降低（P〈0.01）;负压低氧环境对提高胚胎发育率的作用不明显。  相似文献   

4.
本实验探讨了促性腺激素(FSH、LH)对猪卵母细胞体外成熟的影响,并最终找到了其合理的使用剂量.实验选取具有3层致密卵丘细胞层及均匀细胞质的猪卵丘-卵母细胞复合物(COCs)在体外进行成熟培养.体外成熟培养液为改良的TCM-199液,根据实验设计再添加不同浓度的FSH和LH.卵母细胞体外成熟培养条件为39 ℃、5%CO2与饱和湿度下,成熟培养48 h.培养结束后,以第1极体排出作为卵母细胞成熟的标准.在成熟液中添加LH浓度分别为1、5、10 IU/mL时,与没有添加FSH与LH的对照组(成熟率为15.9%)相比,成熟率有显著提高,前者成熟率分别为49.1%、30.0%、36.3%.LH浓度为1 IU/mL的实验组成熟率最高,显著高于对照组(P＜0.05);然后以成熟液中只添加浓度为1 IU/mL LH为对照组,实验组添加FSH浓度分别为1、5、10 IU/mL.结果表明,添加FSH浓度为5 IU/mL和10 IU/mL时其成熟率分别为40.1%、27.6%,低于对照组(49.0%).添加FSH浓度为1 IU/mL时其成熟率(49.1%)高于对照组(49.0%),但差异不显著(P＞0.05).试验表明,随着FSH与LH添加浓度逐渐增加,成熟率呈下降趋势.添加FSH与LH浓度均为1 IU/mL可得到最佳的成熟效果.  相似文献   

5.
探讨了卵泡液、受精时间和季节对绵羊卵母细胞体外培养效果的影响。从屠宰场采集羊卵巢,抽取卵巢表面2mm-6mm的卵泡卵母细胞,进行体外成熟培养;卵母细胞成熟后,与处理后的精子共同培养进行受精。结果表明,在卵母细胞成熟培养液中添加绵羊卵泡液（SFF）组的卵裂率和囊胚发育率均优于添加同等浓度的牛卵泡液（BFF）组;受精22、18、12h组的卵裂率分别为64.85%、54.39%、48.72%,受精22h和18h组间差异显著（P〈0.05）,受精22h组和12h组间差异极显著（P〈0.01）。秋季绵羊体外受精的卵裂率和囊胚率均高于夏季,差异显著（P〈0.05）,但秋季与春季相比差异不显著（P〉0.05）。因此,进行绵羊卵母细胞体外成熟培养时,培养液中添加SFF;受精时,精卵共培养时间为22h的效果较好。在绵羊的繁殖季节秋季进行体外受精较春季和夏季的结果好。  相似文献   

6.
不同培养液对牛卵母细胞成熟及核移植效率的影响   总被引：1，自引：0，他引：1  
在牛卵母细胞成熟液中分别添加促卵泡素(FSH)10μg/L、胰岛素-转铁蛋白-硒(ITS)10μL/mL、表皮生长因子(EGF)10μg/L,配成3种不同体外成熟液对牛卵母细胞进行成熟培养,结果FSH组卵母细胞成熟率84.2%显著高于ITS组75.9%和EGF组70.2%。卵母细胞成熟后构建牛体细胞核移植胚胎,结果FSH、ITS组卵裂率分别为87.2%、81.9%,显著高于EGF组(73.6%),但三组间囊胚率差异不显著(P0.05)。  相似文献   

7.
实验主要研究促卵泡素(FSH)、促黄体素(LH)对延边黄牛卵母细胞体外成熟及重组胚发育的影响,从而提高延边黄牛体细胞克隆的效率。采集屠宰后延边黄牛卵巢,用抽吸法回收卵母细胞,然后在不同种类、浓度激素条件下进行卵母细胞的体外成熟培养,最后将成熟的卵母细胞进行核移植及重组胚的体外培养。实验分别比较了在0、5、10、15、20μg/mL条件下,单独使用FSH与LH和在15μg/mL的FSH与10μg/mL的LH共同作用下对延边黄牛卵母细胞体外成熟率、卵裂率和囊胚发育率的影响。结果表明:将卵母细胞单独置于加有浓度为15μg/mL的FSH和10μg/mL的LH的成熟液中培养,其成熟率及后期发育率优于其他浓度组(P<0.05);而2种最优浓度同时添加共同作用时要好于单独使用(P<0.05)。由试验可得出,成熟培养液中单独添加15μg/mL的FSH和单独添加10μg/mL的LH浓度对延边黄牛卵母细胞体外成熟及重组胚后期发育效果最好;使用最佳浓度进行协同作用时,其共同作用要好于单独使用的效果。  相似文献   

8.
为了探讨绵羊卵母细胞体外成熟过程中促卵泡素(FSH)的适宜添加量,试验将FSH分为0.01,0.02,0.03 IU/mL 3个浓度梯度,用于绵羊卵母细胞的体外成熟与体外受精,统计第一极体排出率、卵裂率和囊胚率。结果表明:不同浓度FSH对第一极体排出率影响差异不显著(P>0.05),体外受精后以0.02 IU/mL组效果最好,卵裂率显著高于0.03 IU/mL组(P<0.05),但与0.01 IU/mL组相比差异不显著(P>0.05);0.02 IU/mL组囊胚率与其他2组相比显著升高(P<0.05)。  相似文献   

9.
为研究不同激素及其组合在猪卵母细胞体外成熟及对其后孤雌胚胎发育的影响,我们对比了孕马血清促性腺激素(PMSG)与人绒毛膜促性腺激素(hCG)组合、卵泡刺激素(FSH)与促黄体素(LH)组合、雌二醇(E2)及这些卵母细胞经孤雌激活后囊胚率的影响;以及不同FSH和LH浓度组合对猪卵母细胞体外成熟率。结果表明,在卵母细胞体外成熟液中添加10 U/mL PMSG和10 U/mL hCG的成熟率和孤雌囊胚率都达到最高(85.9%和55.3%);FSH与LH的组合次之,分别为77.1%和53.5%;E2最差,成熟率仅为54.0%囊胚率为19.5%。而在FSH与LH不同浓度配比中以10 U/mL FSH和20 U/mL LH时,猪卵母细胞成熟率最高达到80.9%。  相似文献   

10.
本试验探讨了促性腺激素(FSH、LH)对猪卵母细胞体外成熟的影响,最终找到了其合理的使用剂量。在成熟液中添加LH浓度分别为1、5、10 IU/mL时,与没有添加FSH与LH的对照组(15.9%)相比,成熟率有显著提高,成熟率分别为49.1%、30.0%、36.3%。LH浓度为1 IU/mL的实验组成熟率最高,显著高于对照组(p<0.05);然后以成熟液中只添加1 IU/mLLH为对照组,试验组分别添加1、5、10 IU/mLFSH。试验结果表明:添加FSH浓度为5和10 IU/ml时其成熟率分别为40.1%、27.6%,低于对照组(49.0%)。添加FSH浓度为1 IU/mL时其成熟率(49.1%)高于对照组(49.0%),但差异不显著(p>0.05)。两组试验同时得出,随着LH与FSH添加浓度的增加,成熟率呈下降趋势。通过本试验结果得出,在体外成熟培养猪卵母细胞时,各添加1 IU/mL LH与FSH时,得到最佳的成熟效果。  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.
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   

15.
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   

16.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

17.
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   

18.
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   

19.
正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in  相似文献   

20.
Tropical Animal Health and Production -  相似文献   

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