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1.
超排方法及兔龄对家兔超排效果的影响 总被引：9，自引：0，他引：9
采用国产促卵泡激素（FSH），促黄体激素（LH）和人绒毛膜促性腺激素（HCG），分别以FSH LH（A法），FSH HCG（B法）两种不同的处理方法，对不同年龄的家兔进行超排处理，旨在选择对家兔有效的超排方法，比较兔龄对超排效果的影响。结果表明，用A法对经产母兔和青年母兔处理后的排卵数分别为68枚，46枚；回收胚胎数分别为36枚，15枚；有效胚胎数分别为27枚，10枚，用B法对经产母兔和青年母兔处理后的排卵数分别为93枚，71枚；回收胚胎数分别为59枚，37枚，有效胚胎数分别为45枚。26枚。以上指标均以FSH HCG组最高，经产兔超排效果较青年兔好。 相似文献
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新西兰白兔超数排卵试验研究 总被引：4，自引：2，他引：2
采用国产FSH和德国产PMSG对58只新西兰白兔进行超数排卵试验.结果表明:①两种激素均有较好的超数排卵效果,FSH组平均排卵点和平均回收胚胎数分别为28.5±18.0个、22.5±13.2枚;PMSG组分别为27.0±11.9个、23.6±9.8枚.经t检验,两者差异不显著(P＞0.05),但从超排母兔回收胚胎的分布情况看,PMSG组的超排效果更稳定些.②右侧卵巢排卵数无论是FSH组(53.7%),还是PMSG组(50.5%)均高于左侧卵巢(分别为46.3%和49.5%),FSH组左、右侧卵巢排卵数差异极显著(P＜0.01),PMSG组差异不显著(P＞0.05).③两种激素在春季对母兔的超排效果都明显地优于秋季(P＜0.01). 相似文献
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中国大白兔的超数排卵效果比较 总被引：5，自引：0，他引：5
采用国产FSH和德国产PM SG对58只中国大白兔进行超数排卵试验。结果表明:①两种激素超排均有较好的效果,FSH组平均排卵点和平均回收胚胎数分别为285±180个、225±132枚;PM SG组分别为270±119个、236±98枚,经t检验,两者差异不显著(p>005),但从超排母兔回收胚胎的分布情况看,PM SG组的超排效果更稳定些。②右侧卵巢排卵数无论是FSH组(537%)还是PM SG组(505%)均高于左侧卵巢(分别为463%和495%),FSH组左、右侧卵巢排卵数差异极显著(p<001),PM SG组差异不显著(p>005)。③两种激素在春季对母兔的超排效果都明显优于秋季(p<001)。 相似文献
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胚胎移植技术在纯种德国肉用美利奴羊选育中的应用研究 总被引：3，自引：0，他引：3
对28只纯种德国肉用美利奴供体羊进行超排处理,供体羊共计排卵453枚,平均每只羊(16.18±4.04)枚,共回收可用胚胎385枚,平均每只羊(13.75±4.01)枚.将385枚胚胎移植给326只受体羊,产羔率达到77.61%.结果表明①供体羊的年龄对超数排卵效果没有明显的影响;对性成熟不久的供体羊,初次诱发排卵时适当降低FSH剂量可与成年经产母羊一样有较好的超排效果.排卵点分别为(16.86±4.61)枚(育成羊)、(15.60±3.40)枚(成年羊),可用胚为(14.15±4.45)枚(育成羊)、(13.40±3.56)枚(成年羊).②合理的饲养管理是受体羊胚胎移植后受胎率的关键,补饲条件下受体羊产羔率(81%)显著高于典型草原放牧型受体羊的产羔率(76.1%).③供、受体羊的发情同步差对受体羊的产羔率有重要的影响,同步差0 h、±12 h的受体羊产羔率(76.54%)显著高于同步差±24 h的产羔率(52.54%). 相似文献
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文章旨在研究季节对供体奶山羊超数排卵效果的影响，为胚胎移植等生物工程技术的研究提供必要的数据。分别在春季（3～5月份）秋季（9～11月份）和冬季（12～2月份）3个季节用FSH多次递减注射法对奶山羊进行超数排卵处理，鉴定超排效果。结果：春秋冬3个季节超排的平均排卵点和平均获卵数分别为9.20个、7.15枚，10.58个、9.48枚和10.42个、10.49枚，春季平均排卵点和平均获卵数均显著低于秋冬季节（P＜0.05），表明季节对奶山羊的超排效果影响显著。
[关键词]奶山羊|季节|超数排卵（超排）|卵母细胞 相似文献
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超数排卵在动物胚胎工程技术的体内胚生产中起关键作用,不同品种甚至个体对超数排卵的反应不同。人绝经期促性腺激素(HMG)是从绝经期妇女尿液中提纯得到的具有促卵泡素(FSH)活性的蛋白质激素,在医学上广泛应用于诱导排卵和治疗不育不孕症。本试验以安格斯青年母牛为超排供体,采用分次肌肉注射激素方法进行超排处理,比较了HMG与FSH用于安格斯母牛超数排卵的效果。B超检查发现,HMG和FSH超排处理后牛只两侧卵巢上直径>1cm的卵泡数分别为10.33±0.52和9.25±0.46个,二者差异不显著(P>0.05),表明HMG与FSH同样安全有效;总剂量1 400IU的HMG或FSH用于安格斯母牛超排后B超检查卵巢没有发现异常变化,说明该剂量是用于安格斯母牛超数排卵的安全有效剂量。 相似文献
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采用国产促性腺激素对新西兰白兔进行超数排卵试验,研究激素、季节及兔龄对超排效果的影响。结果发现:①FSH组(30.05±8.97个/只)平均排卵数显著高于PMSG组(22.46±5.18个/只)(P＜0.05)。②母兔在春季、夏季、秋季、冬季的平均排卵数为32.34±5.58、15.96±4.11、24.18±4.95和22.61±3.75个/只,春季的处理效果显著优于其他3个季节(P＜0.05),而秋季和冬季处理组之间没有显著差异(P＞0.05),但都显著高于夏季(P＜0.05)。③经产母兔超排处理后的平均排卵数(30.56 ± 6.79个/只)显著高于青年母兔平均排卵数(21.60 ± 3.66个/只)(P＜0.05)。以上结果表明,SH超排效果优于PMSG,且在春季对母兔进行超排处理比较合适,经产母兔比青年母兔超排效果更好。 相似文献
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在高寒放牧条件下,对12头祁连山型母牦牛进行了选择不同超排方法和FSH剂量及使用中科院动物所FSH、LH,国产PGP2α、HCG,新西兰FSH的超排试验,供试母牦牛在发情11～12天开始注射FSH.结果表明A组FSH 8.4 mg,母牦牛与正常发育相似,冲出2枚发育正常囊胚,1头放弃;B组FSH 8.6 mg,利用PVP包埋1次注射,母牦牛卵巢处于静止状况,插管1头,没有冲出胚胎,超排处理无结果.说明牦牛用FSH 8.4～8.6mg剂量偏小,对超排无效果;C组FSH8.8 mg,分FSH+LH(2001U)、FSH+HCG(10001U)、卵巢黄体数10±4,2头牦牛冲卵,获14枚胚胎,有1头牦牛冲出10枚胚胎,其中有2枚发育到16细胞,1枚发育到32细胞,说明FSH+HCG(LH)有协同作用,促进卵巢上卵母细胞成熟和排卵;D组FSH 15 mg(新西兰产)1头牦牛冲出3枚发育正常早期囊胚. 相似文献
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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
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Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
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
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Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
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
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B. Cinar Kul N. Bilgen J.A. Lenstra O. Korkmaz Agaoglu B. Akyuz O. Ertugrul 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2015,132(6):449-453
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
16.
Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
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
17.
Waruiru RM Thamsborg SM Nansen P Kyvsgaard NC Bogh HO Munyua WK Gathuma JM 《Tropical animal health and production》2001,33(3):173-187
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
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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
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Troxel MT Vite CH Van Winkle TJ Newton AL Tiches D Dayrell-Hart B Kapatkin AS Shofer FS Steinberg SA 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):850-859
The purpose of this study was to determine the frequency of different tumor types within a large cohort of cats with intracranial neoplasia and to attempt to correlate signalment, tumor size and location, and survival time for each tumor. Medical records of 160 cats with confirmed intracranial neoplasia evaluated between 1985 and 2001 were reviewed. Parameters evaluated included age, sex, breed, FeLV/FIV status, clinical signs, duration of signs, number of tumors, tumor location(s), imaging results, treatment, survival times, and histopathologic diagnosis. Most of the cats were older (11.3 +/- 3.8 years). Primary tumors accounted for 70.6% of cases. Metastasis and direct extension of secondary tumors accounted for only 5.6 and 3.8% of cases, respectively. Twelve cats (7.5%) had 2 or more discrete tumors of the same type, whereas 16 cats (10.0%) had 2 different types of intracranial tumors. The most common tumor types were meningioma (n = 93, 58.1%), lymphoma (n = 23, 14.4%), pituitary tumors (n = 14, 8.8%), and gliomas (n = 12, 7.5%). The most common neurological signs were altered consciousness (n = 42, 26.2%), circling (n = 36, 22.5%), and seizures (n = 36, 22.5%). Cats without specific neurological signs were common (n = 34, 21.2%). The tumor was considered an incidental finding in 30 (18.8%) cats. In addition to expected relationships (eg, meninges and meningioma, pituitary and pituitary tumors), we found that lesion location was predictive of tumor type with diffuse cerebral or brainstem involvement predictive of lymphoma and third ventricle involvement predictive of meningioma. 相似文献