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1.
实验感染肝片吸虫水牛和山羊的细胞免疫反应 总被引：3，自引：0，他引：3
为评价肝片吸虫病的细胞免疫反应，选用８头雄性去势水牛和６只雄性山羊，经粪便检查和Ｄｏｔ－ＥＬＩＳＡ检测确认无肝片吸虫感染。经２周适应性饲养后，随机将水牛分成试验组（ｎ＝５）和对照组（ｎ＝３）。试验组水牛每天每头经口感染６０个囊蚴，连续２０ｄ，共接种１２００个囊蚴。山羊分成试验１组、实验２组和对照组，每组２只。试验１组和２组每只山羊分别一次性口服接种５００个和２００个囊蚴。水牛在感染前５周和感染后２６周内，山羊在感染前１周和感染后１６周内，每周颈静脉采血１次，测定外周血Ｔ淋巴细胞增殖反应和／或白细胞介素－２水平。结果表明，水牛在感染后１～６周，Ｔ淋巴细胞增殖反应有上升趋势，而在感染后１３～１７周低于对照组；血清白细胞介素－２水平有类似于淋巴细胞增殖反应的变化。实验１组山羊血清白细胞介素－２水平低于对照组，而实验２组在感染后２～１１周有上升的趋势，以后下降。 相似文献
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急性感染肝片吸虫水牛的某些免疫反应研究 总被引：1，自引：1，他引：0
本实验选用12头体重为300－500kg，年龄2－3岁的雄性去势水牛，经粪便检查和Dot-ELISA检测确认为无肝片吸虫感染后，随机分为感染组（n=9）和对照组（n=3）。感染组每头水牛1次性经口感染1600个肝片吸虫囊蚴。实验期间由专人饲养，自由采食青干草和饮水。每周定时颈静脉采血，测定外周血淋巴细胞增殖反应、白细胞介素－2（IL－2）水平、T和B淋巴细胞比例、IgG水平以及血清蛋白总量和比例。结果表明：感染组水牛的T淋巴细胞刺激指数在感染后2－8周高于对照组，但刺激指数和IL－2与对照组均无显著性差异。感染组水牛的外周血T淋巴细胞比例从感染后第1周显著下降，以后一直在低于对照组水平波动，而淋巴细胞从感染后第1周开始显著升高，且一直在高于对照组范围内波动。感染组水牛的α-球蛋白、β－球蛋白与对照组相比均无显著性差异，而白蛋白从第5周开始显著下降，以后维持在低于对照组的水平范围波动；γ－球蛋白从第5周显著高于对照组，以后于对照组范围波动。感染组水牛的抗ES抗原（分泌－排泄抗原）的IgG抗体水平从第2周升高，并持续至实验结束。结果提示：体液免疫应答反应是水牛抗肝片吸虫感染的重要机制。 相似文献
3.
将１０头患有卵巢静止的母牛分成Ⅰ（ｎ＝３），Ⅱ（ｎ＝３），Ⅲ（ｎ＝３），Ⅳ（ｎ＝１）四组进行治疗，采用ＬＨ－ＲＨ１００μｇ肌肉注射，间隔１小时再用二倍量注射一次；或用ＬＨ－ＲＨ类似物２００μｇ和４００μｇ肌肉注射。 相似文献
4.
山羊内毒素休克诱发脂质过氧化作用及山莨菪碱对其影响的研究 总被引：13，自引：0，他引：13
本文将３０头杂交山羊分成３组,第１组（ｎ＝６）为对照组,第２组（ｎ＝１２）静注大肠杆菌内毒素复制休克模型,第３组（ｎ＝１２）在第２组基础上提前１０ｍｉｎ静注山莨菪碱性注射液,检测１２ｈ内不同时间血清丙二醛（ＭＤＡ）含量,总ＳＯＤ,Ｍｎ－ＳＯＤ,ＣｕＺｎ－ＳＯＤ,ＣＡＴ和血液ＧＳＨ－Ｐｘ活性,结果表明,第２组血清ＭＤＡ含量明显增加（Ｐ〈０．０１）,血清Ｔ－ＳＯＤ,Ｍｎ－ＳＯＤ,ＣｕＺｎ－ＳＯＤ,ＧＳ 相似文献
5.
８头健康阉公水牛，５头经口每日感染肝片吸虫囊蚴６０个／头，连续２０ｄ；３头不感染作对照，于感染前和感染后每周采集颈静脉血样１次，共２７次，分别测定血浆ＩＧＦ－Ｉ，β内啡肽（β－ＥＰ）以及ＷＢＣ，ＤＣ；Ｔ，Ｂ淋巴细胞比例和血清抗肝片吸虫ＩｇＧ水平，结果ＩＧＦ－Ｉ和β－ＥＰ分别在开始感染后第５周和第４周显升高，并持续互第２３周和第９周，ＩｇＧ水平也在第４－２２周显高于对照组，嗜酸性粒细胞和Ｂ淋巴细 相似文献
6.
选择12头健康、2～3岁、体重300～400kg雄性去势水牛，粪便检查和Dot—ELISA检测确认无肝片吸虫感染，随机分成感染组(n=9)和对照组(n=3)。感染组每头经口一次性感染1600个肝片吸虫囊蚴。研究了水牛急性感染肝片吸虫后血中几种花生四烯酸代谢物及激素动态变化。结果表明：水牛在急性感染肝片吸虫后整个实验期里没有明显的临床症状，具有较大的耐受力和抵抗力；水牛感染后，PGE2在16周前高于或明显高于对照组，以后两组相近；6—keto—PGF1α在整个实验期感染组与对照组无明显差异；TXB2在第1—10周低于或明显低于对照组。血浆Cort在第4—10周高于或明显高于对照组；T4在第4—22周总体水平高于或显著高于对照组；Ins和T3在整个实验期两组比较未见明显差异性变化。结果提示：水牛在急性感染肝片吸虫后，血中一些花生四烯酸代谢物变化明显，参与病理生理发生发展过程。 相似文献
7.
水牛实验感染大片吸虫及ELISA检测特异性抗体的变化 总被引：3，自引：0，他引：3
目的 本试验为了对水牛感染大片吸虫的情况进行了解。方法 选 10头 6月龄水牛 ,分成 2组 ,每组 5头 ,A组对照 ,B组试验 ,每头经口感染 2 5 0个大片吸虫囊蚴。结果 水牛感染大片吸虫后的收虫率为 16 .2± 8.0 % ,在感染后第 13～ 14周检出虫卵。抗大片吸虫分泌排泄产物 Ig G水平从感染后第 2周明显升高 ,17周时达到高峰。结论 试验证实水牛对大片吸虫感染很敏感 ,EL ISA检测特异性抗体用于片形吸虫病的早期诊断有一定的意义 相似文献
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10.
大片吸虫感染水牛对宿主增重影响的初步研究 总被引：1，自引：1，他引：0
试验初步研究大片吸虫感染水牛对宿主增重影响。 1 0头 1 0 -1 2月龄本地与摩拉或尼里杂交一代水牛分为A、B两组 ,A组 5头作对照 ,B组5头每头经口感染 2 5 0个大片吸虫囊蚴。感染前和感染后每月称重一次。从感染后第 1 0 -1 9周检查大片吸虫虫卵。结果表明 ,水牛感染大片吸虫后第 1 4周检出虫卵。对照组水牛从感染后第0 -4个月的平均增重分别为 0 0 ,2 2 6,40 6,5 1 8和 72 6;感染组水牛的同期增重为 0 0 ,1 4 6,2 7 0 ,3 5 2和 5 2 6千克 ;感染组的增重从感染后第 2个月开始至感染后第 4个月 ,两组的增重有显著性差异 (P 0 0 5 )。 相似文献
11.
头健康阉公水牛, ５ 头经口每日感染肝片吸虫囊蚴６０ 个／ 头, 连续２０ ｄ ; ３ 头不感染作对照。于感染前和感染后每周采集颈静脉血样１次, 共２７ 次, 分别测定血浆 Ｉ Ｇ Ｆ Ⅰ、β内啡肽 （β Ｅ Ｐ） 以及 Ｗ Ｂ Ｃ 、 Ｄ Ｃ ; Ｔ、 Ｂ 淋巴细胞比例和血清抗肝片吸虫 Ｉｇ Ｇ 水平。结果 Ｉ Ｇ Ｆ Ⅰ和β Ｅ Ｐ 分别在开始感染后第５ 周和第４ 周显著升高, 并持续到第２３ 周和第９ 周; Ｉｇ Ｇ 水平也在第４ ～２２ 周显著高于对照组, 嗜酸性粒细胞和 Ｂ 淋巴细胞比例也明显升高。结果表明肝片吸虫感染后水牛免疫功能的变化可能与 Ｉ Ｇ Ｆ Ⅰ及β Ｅ Ｐ 有关。 相似文献
12.
15 头水牛在人工感染条件下进行肝片吸虫感染, 慢性感染组水牛每天口服60 个囊蚴, 20 d 总共口服1 200 个囊蚴。急性感染组水牛1 次口服1 600 个囊蚴。慢性感染的水牛于感染后第26 周宰杀。急性感染的水牛分别于第10 , 13 , 16 和22 周宰杀。肝脏的组织病理学显示, 肝片吸虫幼虫可引起肝脏一系列炎症反应。急性感染后第10 周和13 周肝细胞变性、坏死, 肝小叶内淤血, 大量淋巴细胞浸润, 继而发展为肝索萎缩。急性感染后第22 周及慢性感染后第26 周, 汇管区内有大量结缔组织及新生的小胆管增生。实验表明慢性感染和急性感染肝片吸虫的水牛均可导致肝脏典型的病理学变化。 相似文献
13.
Ganga G Varshney JP Sharma RL Varshney VP Kalicharan 《Research in veterinary science》2007,82(1):61-67
Effect of Fasciola gigantica infection on adrenal and thyroid glands was investigated using eight male, yearling Murrah buffaloes. The animals were randomly assigned to two groups of four buffaloes each (Group-A, infected; Group-B, non-infected control). Animals of Group-A were orally infected with 1000 F. gigantica viable metacercariae, keeping other four animals of Group-B as uninfected control. In the infected buffaloes, the clinical signs began appearing from 7th week postinfection (p.i.) and eggs were detected in the faeces between day 93 and 99 (95.5+/-1.25) postinfection (p.i.). The serum cortisol level, revealed a significant (P<0.05) rise during initial stage of the infection, followed by a continuous fall from 12th week onward. Peak cortisol level on 10th week (13.30+/-2.57ngml(-1)) was associated with eosinophilia (11.0+/-0.95%). However, non-infected controls maintained almost uniform cortisol levels (3.97+/-0.15-5.88+/-0.09ngml(-1)) throughout the period of the study. The pathological changes of adrenal glands were correlated with physiological dysfunction of the glands. The levels of T(3) and T(4) were significantly (P<0.05-0.01) low from 14th week onward and were synchronous with in situ migration, growth and development of F. gigantica. Significant reduction in the thyroid hormones was further supported by histopathological evidence of lymphocytic thyroiditis confirming hypothyroidism. A decrease in Hb, PCV, total erythrocyte counts and appearance of reticulocytes in the blood of the infected buffaloes suggested regenerative anemia, which could partly be due to hypothyroidism. 相似文献
14.
实验选择9只健康、6－10月龄雄性白山羊，经粪便学检查和Dot-ELISA检测，确认无肝片吸虫感染，随机分成感染组（n=5)和对照组（n=4)，试验组每只1次口服接种150个肝片吸虫囊蚴，每周定时从颈静脉采集感染前（0周）和感染后15周血液1次分离血清。测定血清谷胱甘肽过氧化物酶（GSH－Px)活性、超氧化物歧化酶（SOD）活性、过氧化物酶（CAT）活性、丙二醛（MDA）和一氧化氮含量的变化，结果表明肝片吸虫感染后血清中GSH－Px活性除第8周试验组显著高于对照组，其他各周无显著差异；在整个实验期间，试验组山羊血清中SOD活性在1－5周呈波动状，以后两组基本处于同一水平；试验组山羊血清CAT活性在感染后第3周显著低于对照组，第6－15周时，试验组始终高于对照组，但各周差异均不显著；试验组山羊血清中MDA含量在整个实验期间始终呈波动状，而在第8、9周试验组显著高于对照组，中周与对照组相比无显著差异；感染后试验组血清中NO开始下降，并且显著低于对照组，至第3－6周时试验组显著高于或低于对照组，第6－15周，试验组一直高于对照组，并在第7、10周时显著地高于对照组。提示山羊感染肝片吸虫后，机体发生多种功能的改变，机体的自由基产生与清除处于相互对抗之中，机体的自由基代谢参与了肝片吸虫病的发展过程。 相似文献
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The objective of this study was to compare oestrus expression and fertility rate in used and new controlled internal drug releasing (CIDR) device treated anoestrous buffaloes. Furthermore, to determine the timing of ovulation, and fertility rate in estradiol benzoate (EB) and GnRH-administered CIDR-treated anoestrous Nili-Ravi buffaloes. In experiment 1, buffaloes received either a used CIDR (UCIDR, n = 35) or a new CIDR (NCIDR, n = 36) for 7 day and PGF2α on day 6. Oestrous expression was similar (p > 0.05) between UCIDR (88.5%) and NCIDR (96.6%) buffaloes. The pregnancy rate did not differ (p > 0.05) because of treatment (37.1% in UCIDR vs 36.6% in NCIDR). In experiment 2, buffaloes (n = 55) received CIDR device for 7 days and PGF2α, on day 6 and randomly assigned into three treatment groups: (i) CIDR-EB (n = 17) received EB on day 8, (ii) CIDR-GnRH (n = 18) received GnRH on day 9 and (iii) control (n = 20) received no further treatment. Mean interval from CIDR removal to ovulation in CIDR-EB, CIDR-GnRH and CIDR group were 61.3 ± 0.8, 64.9 ± 1.8 and 65.1 ± 16.7 h, respectively. However, the buffaloes in the CIDR-EB and CIDR-GnRH group had lesser variability in the timing of ovulation compared to control. The pregnancy rate of both CIDR-EB group (58%) and CIDR-GnRH group (61%) were tended to be higher (p < 0.1) than control (30%). In conclusion, compared to NCIDR devices, previously UCIDR devices are equally effective to induce oestrus in anoestrous buffaloes resulting optimal pregnancy rate. Administration of EB and GnRH after CIDR removal results in tighter synchrony (less variability) and improved fertility in anoestrous buffaloes. CIDR based synchronization regimens have great potential in fertility improvement in anoestrous buffaloes. 相似文献
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The effects of Fasciola gigantica infection on bodyweight gain, dry matter intake, digestibility of nutrients and feed conversion efficiency in buffalo calves were investigated. Nine male buffalo calves of the Murrah breed, aged 12 to 15 months with a mean (se) bodyweight of 166 (12.5) kg, were randomly assigned to groups of five (group 1) and four (group 2). The animals in group 1 were given 1000 viable, mature metacercariae of F gigantica orally, while the animals in group 2 served as uninfected controls. They were stall fed on diets containing a concentrate mixture and ad libitum wheat straw and were maintained by standard management practices for a period of 165 days after infection. The average daily liveweight gain of the infected animals was 110.6 g, compared with 439.4 g in the uninfected controls, and was associated with the appearance and establishment of immature flukes in hepatic bile ducts. The feed conversion efficiency declined significantly (P<0.01) from 41 days after infection and was lowest at the end of the experiment. F gigantica infection did not influence the digestibility of the nutrients. The impaired feed conversion efficiency was mainly due to a reduction in dry matter intake due to inappetence. 相似文献
17.
Closantel缓释剂驱除山羊实验感染肝片吸虫的效果 总被引：3，自引：0，他引：3
选用 5只实验感染肝片吸虫山羊进行 Closantel(氯氰碘柳胺 )缓释剂驱虫试验。试验用山羊每只一次性口服肝片吸虫囊蚴 15 0个 ,感染后第 15周随机将山羊分成对照组 (n=2 )和驱虫组 (n=3) ,驱虫组每只羊口服 2丸 Closantel缓释剂 (含 15 .5 % Closantel,每丸 7.6 g) ,每周定时采集颈静脉血和进行粪便检查 ,每月称重 ,试验结束时剖检测量肝重和计数肝内虫体数 ,以驱虫前后山羊的红细胞、白细胞、嗜酸性粒细胞、血清抗体和一氧化氮的变化、体重变化、剖检时肝重 /体重之比、虫卵的变化以及虫体减少率作为衡量驱虫效果的指标。结果表明 ,投药后嗜酸性粒细胞在第 1、2、3周与对照组相比有显著下降 ,其他各项指标与对照组相比虽有一定差异但不显著。虫体减少率为 4 1.2 2 %。提示Closantel缓释剂对驱除实验感染肝片吸虫有一定效果 ,在虫体感染前投药会起到预防作用。 相似文献
18.
实验肝片吸虫感染对大鼠机体自由基代谢影响的研究 总被引：3，自引：0，他引：3
通过大鼠感染肝片吸虫复制感染模型 ,研究肝片吸虫感染后血清抗氧化功能的变化。 60只大鼠随机分成感染组和对照组 ,每组 30只。感染组大鼠一次口服 2 5个囊蚴 ,对照组不感染。于感染前 (0周 )和感染后 (1 ,3,5,7,9周 )采集血样 ,检测感染后谷胱甘肽过氧化物酶(GSH Px)、超氧化物歧化酶 (SOD)、过氧化物酶 (CAT)活性和丙二醛 (MDA)含量的变化。结果表明大鼠感染肝片吸虫后 ,感染组血清中GSH Px先升高后下降 ,SOD活性无明显变化 ,CAT活性在感染后下降 ,MDA含量在前 5周变化不明显 ;说明自由基参与了肝片吸虫病的发病过程 相似文献
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Disease-related stress associated with Fasciola gigantica infection was investigated in 16 male, yearling Murrah buffaloes. The animals were randomly assigned to one of four groups. Animals in groups 1 and 2 were vaccinated subcutaneously with 4.8 mg of excretory-secretory antigen (group 1) or 1300 μg infection-specific antigen (group 2), in three doses. Subsequently, all the animals in groups 1, 2 and 3 were infected orally with 800 viable F gigantica metacercariae (bubaline origin) on week 6 of the experiment. The animals in group 4 served as healthy controls. The clinical progress of the disease with respect to the adrenocortical response to infection was assessed periodically. The infected animals in group 3 developed characteristic signs of the disease and had the highest in situ fluke population (mean [se] 331.8 [19.5] ). One of the four animals in group 3 died on day 110 postinfection (PI). Animals that had been immunised before infection (groups 1 and 2) acquired adequate levels of immunity, were comparatively healthier and had significantly lower (P<0.05) fluke populations (mean [se] 194.3 [11.8] in group 1 and 164.5 [9.2] in group 2). Throughout the course of the disease, the group 3 animals had significantly higher cortisol levels than those in groups 1 and 2 (P<0.01) from week 4 PI onward. Although animals in the immunised groups (groups 1 and 2) had increased hormone levels, they were not significantly different from those in the control animals in group 4. Cortisol levels were higher during the early prepatency phase (weeks 1 to 6 PI) than during the late prepatency and/or patency phases of the disease. Cortisol levels in the healthy control animals in group 4 remained within the normal range. 相似文献
20.
[目的]为了解意大利地中海水牛冻精的授精效果及其在我国生长适应情况。[方法]利用国内首次引进意大利地中海水牛冻精与我国现有的摩拉、尼里——拉菲和本地水牛进行人工授精,试验选取自然发情的摩拉水牛20头,尼里水牛16头,本地水牛32头,年龄在2.5~9岁之间,采用直肠把握子宫角深部输精法,配种后40 d应用B超进行早期妊娠诊断怀孕情况。[结果]：摩拉、尼里——拉菲和本地水牛受胎率分别为50.00%、75.00%、56.25%,平均人工授精配种受胎率为58.82%,品种间人工授精受胎率差异不显著（P〉0.1）。[结论]表明引进地中海水牛冻精开展杂交组合,改良我国现有的水牛品种,提高其生产性能是切实可行的。 相似文献