Effect of semen collection in extender solution on the characteristics of goat spermatozoa

The objective of this experiment was to investigate whether the motility parameters and acrosome integrity of goat ejaculated spermatozoa are affected by collecting semen into tubes containing an extender, and thereby determine the significance of reducing contact between seminal plasma and the sperm membrane at ejaculation. Semen were collected from three goats into tubes containing 0, 1 or 10 ml extender, or collected into tubes containing 10 ml extender supplemented with 0.1, 1 or 5% BSA. Sperm motion parameters were evaluated immediately after collection, after washing, and during a 3-h thermal resistance test. Acrosome integrity was assessed using FITC-PNA staining. Semen collection into tubes containing 10 ml extender produced higher sperm motility, progressive motility, and acrosome integrity than that using a smaller volume of extender. Furthermore, collection into 5% BSA-containing extender exhibited higher sperm characteristics and maintained high sperm motility and progressive motility throughout incubation. In conclusion, semen collection into tubes with a large volume of extender, especially extender containing higher concentrations of BSA, improved the quality of ejaculated spermatozoa, strongly suggesting that the in vitro functional characteristics of the spermatozoa were abruptly modified by flash sperm contact with accessory sex gland fluid at ejaculation.     

葡萄糖、果糖、聚乙烯醇及牛磺酸对山羊精液保存的影响

以Androhep稀释液为山羊精液液态保存基础稀释液,研究了葡萄糖和果糖,聚乙烯醇(PVA)含量,及牛磺酸的添加量对5℃保存山羊精液的影响.结果发现,Androhep稀释液中以只含葡萄糖保存效果最好,PVA的量以0.5%为最佳,牛磺酸添加21 mmol/L时保存6 d精子的活力和质膜完整率最高.     

Counterimmunoelectrophoresis (immunoelectroosmosis) and serum electrophoretic pattern in serologic diagnosis of canine blastomycosis

Counterimmunoelectrophoresis (CIEP) with blastomyces and histoplasma antigens was used in a serologic study of 181 dogs clinically suspected of having blastomycosis and of 8 dogs with confirmed blastomycosis or histoplasmosis. Thirteen of the 181 dogs, positive by CIEP, were euthanatized, and the diagnosis was confirmed by cultivation and/or microscopic detection of Blastomyces dermatitidis. Additional CIEP-positive dogs were confirmed by staining of aspirates collected in vivo. Radiographic support for the diagnosis was reported in 4 other dogs in which histoplasmosis was excluded by a negative CIEP with histoplasma antigen. The precipitating antibody may disappear during the course of the disease, as it did in 1 dog treated with amphotericin B, but not cured. This dog reverted from CIEP-positive to CIEP-negative within 17 months of treatment (with a weak reaction after 10 months of treatment). The CIEP-detectable antibody was present only in 1 dog without a confirmation by histopathologic findings or cultivation among 24 well-documented cases and 181 total tested sera. The CIEP was more sensitive and specific than was the gel-diffusion precipitin test, eliminated the problems of anticomplementarity that often affected the results of complement-fixation tests with canine sera, and served well in detecting dogs with blastomycosis. Electrophoretic pattern of sera from CIEP-positive dogs with blastomycosis showed a decrease in albumin and an increase in alpha 2- and often in beta- and gamma-globulins, with a substantial decrease of the albumin/globulin ratio.     

Effect of weaning on behavior and serum parameters in dairy goat kids

This study aimed at investigating the effects of weaning kids abruptly at an average of 55 ± 13 days of age on intake, behavioral and serum parameters and, lasted for a total of six weeks; two weeks pre-weaning and four weeks post-weaning. Sixteen single kids with equal gender were used. Kids were only allowed to stay with their mothers for suckling (45 min/period) both in the morning and in the evening period during pre-weaning. Grower concentrate and hay were offered ad libitum . The duration of the study was divided into three periods for the sampling of behavioral and serum parameters; (i) pre-weaning period lasting for two weeks (P-BW) (ii) early post-weaning period lasting for one week (P-AW1) and (iii) late post-weaning period lasting for three weeks (P-AW2). Daily weight gain of kids gradually decreased as the observation period progressed ( P  = 0.001). However concentrate feed intake increased from 0.154 kg/day in P-BW to 0.479 kg/day in P-AW1 and 0.499 kg/day in P-AW2. Water intake, rumination and standing behaviors decreased in P-AW2 ( P  < 0.001), whereas activity towards concentrate feed (CF) ( P  < 0.001) and roughage ( P  = 0.012) increased as compared to P-BW and P-AW1. Abnormal oral activity was not affected by the periods ( P  = 0.906). CF was significantly higher in females ( P  = 0.003), whereas males displayed higher lying behavior ( P  = 0.007). Glucose, total protein, urea, cholesterol, HDL-cholesterol, LDL-cholesterol concentrations ( P  = 0.001) and ALP activity ( P  = 0.003) were significantly affected by the periods. The results of the present study suggest that behavioral and serum parameters across the periods describe changes in the nutritional conditions as a result of the transition from milk to solid feed in association with weaning.     

奶山羊精液冷冻稀释液配方筛选

为了筛选适合我区生产上使用的奶山羊冷冻精液稀释液配方,设计5个奶山羊冷冻精液稀释液配方,渗透压1 070～1 720 mmol/kg,pH值5.97～6.99,挑选5只健康成年种公羊,调教采精、制冻。结果显示:1号配方与对照组(5号配方)的保护效果存在一定差异,但差异不显著(P>0.05);2号配方和4号配方与对照组存在显著差异(P<0.05);3号配方与对照组存在极显著差异(P<0.01)。2号、3号和4号3种配方的稀释液对奶山羊精液冷冻后的保护效果都较好,可以在生产上推广使用。     

波尔山羊冷冻精液的研究与试制

于1998年在华亭县神峪波尔山羊繁育场开始波尔山羊冷冻精液的试验与制作。试验筛选的冷冻精液稀释液A配方组成为8%葡萄糖76.5mL，卵黄21mL，甘油2.5mL，对精液保护效果好。所制波尔山羊冷冻精液（颗粒型）解冻活力达0.45，总存活时间8.23h。输配试验表明，情期受胎率达67.05%，总受胎率达79.19%。     

Protein electrophoretic pattern of Pasteurella haemolytica.

Electrophoresis in polyacrylamide gels of the constituent proteins of the 12 serotypes and an untypable strain of Pasteurella haemolytica showed a pattern of bands that divided the group into two. This division conformed to the A and T biotype groupings of Smith (1959) although the serotype A9 showed only minor band difference from the three T serotypes 3, 4 and 10. It was not possible by this method to separate all the type strains from each other by the specific recognition of the patterns of protein mobilities produced.     

培养液及血清浓度对山羊孤雌胚胎体外培养的影响

试验比较了在SOFaa，CRlaa，mCRlaa3种培养液中添加不同浓度的成年山羊血清(NGS)对山羊孤雌胚胎进行体外培养的效果。结果表明：在3种培养液中，添加10％的NGS对山羊孤雌胚胎的体外发育效果较好，囊胚率分别可达62．79％(81／129)、53．52%(38／71)、13．64％(12／88)；mCRlaa组囊胚发育率和囊胚细胞数显著低于SOFaa组和CRlaa组，SOFaa组优于CRlaa组．但SOFaa组和CRlaa组间无显著差异。在现有试验条件下，以在SOFaa培养液中．山羊孤雌胚胎的体外培养的第72小时时加入10％的NGS的发育效果较好，囊胚率可达62．79％。     

辽宁绒山羊精液稀释液保存方法简述

辽宁绒山羊精液稀释液的各种不同的保存方法对其有效保质时问、使用方便性及配种效果都会产生不同的影响。为了更好地开展冻精生产和人工授精改良工作,笔者将辽宁绒山羊精液的几种常用保存方法简要介绍如下。     

Effect of temperature on the sodium sulphite precipitation test for assessment of goat serum immunoglobulin

Total serum immunoglobulin concentrations of apparently normal indigenous goats were estimated by a sodium sulphite precipitation test which utilized 3 concentrations of the salt (i.e. 14%, 16%, 18%). A total of 210 goat serum samples comprising five phenotypically different breeds were examined. Immunoglobulin precipitation was greatly influenced by the incubation temperature. Using different concentrations of the sodium sulphite salt solution, serum samples incubated at either 4°C or 38°C consistently gave clear and rapid precipitation reaction in all samples with immunoglobulin concentrations of over 15 mg/ml.

Tests carried out at normal tropical room temperature (28°–30°C) gave inconsistent results and only 52% gave clear precipitation. Neither breed nor sex had any statistically significant effect on either the precipitation rate or the immunoglobulin values (P < 0.05).

It was concluded that this test if performed at either 4°C or 38°C can be used under field conditions to evaluate immune status of neonatal goats in the tropics.     

辽宁绒山羊细管冻精研制及推广

推广辽宁绒山羊细管冻精是弥补辽宁绒山羊种羊数量缺口的切实可行的有效办法。同时,优质冻精的推广还可以降低绒山羊养殖户的改良成本,加快改良进度,提高改良效果,增加辽宁绒山羊养殖的经济效益。本文详细介绍了辽宁绒山羊细管冷冻精液的发展历程及生产现状,总结了近年来的推广成果,并对辽宁绒山羊冷冻精液的研制与应用前景进行了展望。     

山羊精液常温稀释液和最佳稀释倍数研究

对山羊精液常温稀释液进行筛选,Ⅳ液48小时精子活力为0．37,保存23～25小时情期受胎率84．2％,高倍稀释鲜精配种104800头,情期受胎率70．3％。生产波尔杂交羊16．51万头。     

Evaluation of hyperimmune sera against goat pox viral antigens

Tropical Animal Health and Production -