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1.
应用间接酶联免疫吸附试验(ELISA)技术测定不同水温下鳜经嗜水气单胞菌GYK1株全菌灭活疫苗浸泡免疫后皮肤黏液中抗体,以研究抗体动态变化,揭示温度对抗体产生的影响。结果表明:27.0~29.8℃水温(下称"较高温")下,鳜皮肤黏膜抗体滴度于第7天达到峰值211,而水温介于19.8~23.9℃(下称"较低温")时,抗体滴度于第11天达到峰值26,说明温度较高时,抗体形成快,峰值出现时间早,并且抗体滴度明显升高。另取不同温度下经上述疫苗浸泡免疫的鳜皮肤黏液,采用硫酸铵盐析、离心、浓缩等生物化学技术粗提鳜皮肤黏液中的免疫球蛋白,SDS-PAGE检测发现,较高水温下,高渗免疫组(加10 mg/mL食盐)鳜皮肤黏液蛋白中目标条带(72×103和29×103)深度较其他3个实验组(同温度下全菌组、较低水温下高渗及全菌组)有所增加,ELISA检测该组抗体效价为211。 相似文献
2.
制备无乳链球菌(Streptococcus agalactiae)临床分离株ZJ02的灭活疫苗,采用注射和浸泡2种方法,研究疫苗对吉富罗非鱼(Oreochromis niloticus)的免疫保护效果和血清抗体效价。注射组以4个不同浓度的白油佐剂灭活疫苗免疫罗非鱼,浸泡组以相同免疫剂量的灭活疫苗分别与消旋山莨菪碱、脂肪醇聚氧乙烯醚和氯化钠3种佐剂免疫罗非鱼。结果显示,无乳链球菌疫苗对罗非鱼具有较强的免疫原性,与对照组相比,免疫组血清中的抗体效价水平均显著性提高(p<0.05),注射组和浸泡组的抗体效价最高分别达到1∶256和1∶128;注射组中不同剂量的疫苗免疫组免疫保护率较高,高浓度组可达到95%,浸泡组中使用3种佐剂的免疫组免疫保护率分别为59%、64%、55%。表明无乳链球菌灭活疫苗对罗非鱼具有很好的免疫保护性,免疫剂量在5×108~4×109cfu/mL之间对注射免疫效果有显著性影响,消旋山莨菪碱、脂肪醇聚氧乙烯醚和氯化钠对浸泡免疫效果具有不同的免疫保护率。 相似文献
3.
《广东海洋大学学报》2016,(4)
从患烂尾病眼斑拟石首鱼(Sciaenops ocellatus)的溃疡处分离到一株优势菌So GZ1401,回归感染试验证实该菌是引起烂尾病的病原菌,对眼斑拟石首鱼的半致死量(LD50)为8.6×103 CFU·g~(-1);结合其形态学和生理生化特征及HSP60测序分析,鉴定为哈维氏弧菌(Vibrio harveyi);利用杯碟法研究其胞外产物性质,结果表明:其胞外产物具有淀粉酶、明胶酶、酪蛋白酶、卵磷脂酶、脂酶活性以及溶血活性,但无脲酶活性。药敏试验表明,该菌株对氟哌酸、恩诺沙星、氟苯尼考和复方新诺明等抗菌药有较高的敏感性。制备哈维氏弧菌灭活疫苗,采用注射和浸泡2种途径免疫眼斑拟石首鱼,测定受免疫鱼的血清抗体效价和疫苗对眼斑拟石首鱼的免疫保护率。结果显示,免疫组血清中的抗体效价水平均高于对照组,差异有统计学意义(P0.05),注射组和浸泡组的抗体效价最高值分别达718.4和128,哈维氏弧菌攻毒后免疫保护率分别为75.0%~86.7%和46.4%~56.7%。哈维氏弧菌灭活疫苗对眼斑拟石首鱼具有较好的免疫保护性。 相似文献
4.
通过同源引物从致病性哈维氏弧菌(Vibrio harveyi)ZJ0603基因组中克隆GST的开放阅读框(ORF),构建真核表达质粒pcDNA-GST。大量抽提重组质粒后,于背鳍基部肌肉注射重组质粒免疫斜带石斑鱼(Epinephelus coioides),分析重组质粒的免疫效果。通过核酸水平检测重组质粒在鱼体肝、肌肉、头肾和脾脏组织的分布;用ELISA法检测鱼体血清的抗体水平,用Western-blot检测目的蛋白的表达情况。结果表明:该序列全长615 bp;免疫7 d后,鱼体中均有质粒分布;斜带石斑鱼血清中产生抗GST的高效抗体(1∶4 096);相应的目的蛋白也在鱼体中成功表达。攻毒后,疫苗免疫保护率达80%,表明GST可作为防治哈维氏弧菌病有效候选抗原。 相似文献
5.
从溶藻弧菌中提取肽聚糖,以0.05、0.1、0.15 mg/mL 3种浓度为注射凡纳滨对虾后,测定血淋巴中的血细胞数目、酚氧化酶(PO)、超氧化物歧化酶(SOD)、一氧化氮合成酶(NOS)的活性和虾青素的含量,探讨溶藻弧菌肽聚糖对凡纳滨对虾虾青素含量、免疫指标、免疫保护率的影响。结果表明:注射不同质量浓度的溶藻弧菌肽聚糖都对血清中的血细胞数目、PO、SOD、NOS活性影响显著(p值﹤0.05),对虾青素的含量影响极显著(p值﹤0.01);虾青素的含量与血细胞数目、PO、NOS活性变化趋势无明显的相似性,与SOD活性变化有相似的变化趋势;0.05 mg/mL组的免疫保护率为40%,0.1 mg/mL组为53.33%,0.15 mg/mL组为66.67%。溶藻弧菌肽聚糖可有效地增强凡纳滨对虾非特异免疫力,提高对溶藻弧菌的抗病力,虾青素含量与SOD活性的高低变化趋势相似。 相似文献
6.
《广东海洋大学学报》2016,(1)
对感染白斑综合征病毒(WSSV)的凡纳滨对虾(Litopenaeus vannamei)分别注射0.05和0.10μg/μL的vp28-si RNA,干扰效果实验表明,si RNA最佳浓度为0.10μg/μL。凡纳滨对虾感染WSSV 24 h时注射0.10μg/μL的vp28-si RNA,检测免疫后不同时间点的干扰效果。结果表明:在注射vp28-si RNA 6 h后,实验组与对照组WSSV病毒拷贝数差异有统计学意义(P0.05);在48 h时实验组病毒拷贝数急剧下降,对照组则保持较高水平,可较好干扰WSSV病毒复制,干扰效果持续120 h,对凡纳滨对虾的保护率为40%。凡纳滨对虾用0.10 mg/m L肽聚糖(Peptidoglycan)免疫24 h后感染WSSV,检测6、12、24 h注射vp28-si RNA的保护率。结果显示:6 h注射组的保护率为80%,12 h注射组为63.33%,24 h注射组为56.67%。凡纳滨对虾在肽聚糖和vp28-si RNA作用后,可增加其对WSSV抗感染作用,降低死亡率,干扰时间越早,对对虾的保护率越高。 相似文献
7.
注射氟苯尼考对红笛鲷免疫指标的影响 总被引：1，自引：0，他引：1
以0、5、10、20 mg.kg-1的氟苯尼考腹腔注射红笛鲷,研究氟苯尼考在国家规定的使用范围内对红笛鲷血清部分免疫指标的影响。结果显示:5 mg.kg-1组氟苯尼考对所测的各项指标无影响或影响不显著;10 mg.kg-1组中氟苯尼考对红笛鲷血清SOD活力、AKP活力有显著性提高(P<0.05),对溶菌酶的含量、IgM的含量无显著性影响;20 mg.kg-1组中红笛鲷血清碱性磷酸酶AKP、超氧化物歧化酶SOD活力、溶菌酶、抗体IgM均受到显著性抑制(P<0.05),但影响持续时间不同,这表明高浓度氟苯尼考显著抑制红笛鲷各项免疫指标,从而影响到鱼体自身的免疫功能。 相似文献
8.
《广东海洋大学学报》2015,(6)
从患病凡纳滨对虾(Litopenaeus vannamei)体内提取白斑综合征病毒(WSSV),PCR证实WSSV毒性,将病毒粗提液稀释10-2、10-3、10-4和10-5倍,攻毒实验表明,最佳攻毒剂量为10-4倍稀释液。对凡纳滨对虾(Litopenaeus vannamei)分别注射0.05、0.10、0.15 mg/m L的溶藻弧菌(Vibrio alginolyticus)肽聚糖,免疫24 h后感染WSSV,测定其免疫保护率和肝胰腺的免疫学指标,探讨溶藻弧菌肽聚糖对凡纳滨对虾抗WSSV的影响。结果表明:对虾的保护率随着肽聚糖的浓度增大而增大,与对照组相比,0.05、0.10、0.15 mg/m L组的保护率分别为36.67%、46.67%、56.67%;实验组凡纳滨对虾肝胰腺中的酸性磷酸酶(ACP)、碱性磷酸酶(AKP)、超氧化物歧化酶(SOD)和一氧化氮合成酶(NOS)活力与对照组相比的差异有统计学意义(P0.01)。溶藻弧菌肽聚糖可有效增强凡纳滨对虾自身的非特殊性免疫能力,提高抗WSSV的能力。 相似文献
9.
腹腔注射恩诺沙星和氟苯尼考对红笛鲷血清IgM含量的影响 总被引：1，自引：0，他引：1
以20mg·kg-1恩诺沙星和氟苯尼考分别腹腔注射红笛鲷,通过间接酶联免疫吸附实验法(ELISA)测定红笛鲷血清IgM的含量,研究恩诺沙星与氟苯尼考对红笛鲷血清IgM含量的影响。结果显示:健康红笛鲷血清中IgM抗体的含量为3.591±0.314mg·mL-1,注射后,恩诺沙星组增加至4.234±0.013mg·mL-1,第3周后恢复至初始水平,而氟苯尼考组则降低至2.538±0.214mg·mL-1,第5周仍未恢复至初始水平。可见,恩诺沙星可提高红笛鲷血清中抗体IgM的含量,而氟苯尼考则降低鱼体血清中抗体IgM的含量,且影响时间也较长。 相似文献
10.
寡糖对三黄鸡生产性能及免疫机能的影响 总被引：2，自引：0，他引：2
用96只1日龄广东三黄鸡,研究了饲料添加0.2%或0.3%的寡糖对肉鸡生产性能与免疫机能的影响。结果表明:饲料中添加0.2%的寡糖能显著提高11~30日龄肉鸡的增重、免疫器官指数及新城疫H I抗体滴度(P<0.05),血液白细胞吞噬率和血清IgG含量亦高于对照组,但组间差异不显著;添加0.2%或0.3%的寡糖能明显改善全期的饲料转化率(P<0.05)。 相似文献
11.
Bacterin was prepared by formalin-inactivating the virulent strain of Vibrio hollisae isolated from diseased Seriola dumerili (amberjack) suffering from vibriosis. Healthy S. dumerili were vaccinated by respective procedures of intramuscular injection, immersion, and orally administration. Results of the three different vaccinations were compared. Blood was drawn from the vaccinated fish every 7 days, and the antibody titers and lysozyme activities of the sera were determined. The antibody titer of injected fish was 1:40 at 7 d, and reached its peak of 1:320 at 28 d, while the fish vaccinated by immersion and orally administration exhibited weak antibody responses, the antibody titres of <1:10, 1:20, 1:160 were observed at 7 d, 14 d, 35 d respectively. Compared with the control, the vaccinated fish exhibited significantly higher lysozyme activities (P<0.05). Upon challenge with virulent strain, the relative percent survival (RPS) of injected, immersed and oral administrated fish were 75%, 45%, and 40% respectively, and the injected fish showed significantly higher RPS than immersed and oral administrated fish. The results suggested that vaccination of S. dumerili by the injection would be the best strategy to prevent the vibriosis in S. dumerili farm. 相似文献
12.
Bacterin was prepared by formalin-inactivating the virulent strain of Vibrio hollisae isolated from diseased Seriola dumerili （amberjack） suffering from vibriosis. Healthy S. dumeriIi were vaccinated by respective procedures of intramuscular injection, immersion, and orally administration. Results of the three different vaccinations were compared. Blood was drawn from the vaccinated fish every 7 days, and the antibody titers and lysozyme activities of the sera were determined. The antibody titer of injected fish was 1：40 at 7 d, and reached its peak of 1：320 at 28 d, while the fish vaccinated by immersion and orally administration exhibited weak antibody responses, the antibody titres of 〈1：10, 1：20, 1：160 were observed at 7 d, 14 d, 35 d respectively. Compared with the control, the vaccinated fish exhibited significantly higher lysozyme activities （P〈0.05）. Upon challenge with virulent strain, the relative percent survival （RPS） of injected, immersed and oral administrated fish were 75%, 45%, and 40% respectively, and the injected fish showed significantly higher RPS than immersed and oral administrated fish. The results suggested that vaccination of S. dumerili by the injection would be the best strategy to prevent the vibriosis in S. dumerili farm. 相似文献
13.
Pacific saury(Cololabis saira)is usually sold as whole fish in wholesale markets,or in its gutted form which is easy for consumers to cook in retail markets.In order to assess the effect of gutting on the shelf life of Pacific saury during refrigerated storage and reveal the microbial community,fish samples grouped into(I)whole fish and(II)gutted fish were analyzed periodically for sensory,biochemical and microbiological characteristics,and high-throughput sequencing technology was used to investigate the microbiota.Results showed that the sensory score for the gutted fish became unacceptable on day 8,while the whole fish score remained acceptable for 10 days.The total volatile basic nitrogen(TVB-N)value of the gutted fish reached 30 mg N(100 g)^-1 on day 6,while that of the whole samples surpassed 30 mg N(100 g)^-1 on day 10.The thiobarbituric acid reactive substances(TBARS)value of the gutted fish got close to 5.0 mg kg^-1 on day 10,while that of the whole samples surpassed 5.0 mg kg^-1 on day 14.The aerobic plate colony counts(APCs)for the gutted and whole Pacific saury reached 7.0 log10 CFUg^-1 on days 6 and 10,respectively.Organoleptic,biochemical and microbiological analyses revealed that shelf-lives should be 6–8 days for gutted fish and 10 days for whole fish.Microbiota analysis results showed that gutting partly changed the initial microbiota,but didn't alter the dominant bacteria during storage.When the fish were spoiled,high proportion of Pseudomonadaceae was detected in both groups. 相似文献
14.
The profiles of cortisol, testosterone, ll-ketotestosterone and 17α， 20β- dihydroxy-4-pregnene-3-one in mule rainbow trout reared under constant water temperature and natural photoperiod were determined by radioimmunoassay. Gonads of male rainbow trout reached maturity when the fish were two years old. Changes in the plasma levels of both sex steroid hormones and cortisol were closely related to the GSI. Plasma levels of testosterone, 11-ketotestostemne and 17a, 2013-dihydroxy 4-pregnene-3-one showed a clear peak in the annual breeding season, when the GSI reached their maxima. Plasma cortisol levels also showed clearly seasonal changes in both two- and three-year-old fish. The results suggest that the elevated plasma levels of cortisol may not just be due to stresses during the breeding season but have certain physiological functions in the reproduction of rainbow trout. 相似文献
15.
【目的】研究贮藏时间和加热温度对凡纳滨对虾(Litopenaeus vannamei)虾仁三磷酸腺苷(ATP)关联化合物及虾仁品质的影响。【方法】利用高效液相色谱法分析凡纳滨对虾中6种ATP关联化合物,通过比较不同贮藏时间的凡纳滨对虾虾仁在加热过程中的ATP关联化合物,分析加热前后虾仁的感官品质,以及鱼虾类鲜度指标K值、G值、P值的变化。【结果与结论】随贮藏时间的增加,ATP、二磷酸腺苷(ADP)、腺苷酸(AMP)含量呈下降趋势,肌苷酸(IMP)先上升后下降,次黄嘌呤(HX)和肌苷(HXR)上升;随着加热温度的增加,ATP和ADP下降,AMP增长,IMP、HX、HXR先增加后降低。贮藏2 d后的生虾和贮藏3 d后再加热的虾仁均将达到最大感官可接受上限。随着贮藏时间的增加,加热前后K值、G值和P值线性增加,但生虾的G值与鲜度的相关性较差,不适宜作为鲜度指标,K值和P值可作为生虾的鲜度指标。加热后的K值、G值、P值与贮藏时间、感官质量评定值(QI值)的线性回归方程的决定系数较好,表明K值、G值、P值可以用来表征熟虾的品质。 相似文献
16.
运用放射免疫分析法测定了促黄体释放激素类似物 (LHRH A)和人绒毛膜促性腺激素(hCG)对南方鲶血清促性腺激素 (GTH)水平的影响 ,结果表明 :LHRH A和hCG都能提高南方鲶一龄幼鱼血清GTH水平 ,hCG与LHRH A结合注射后血清GTH水平显著高于单独注射hCG或LHRH A后的血清GTH水平。LHRH A和hCG结合注射可诱导性成熟南方鲶排卵 ,同时排卵过程中伴随着血清GTH水平的急剧上升 ,在排卵后迅速下降 ;注射同样剂量的药物而未排卵的血清GTH水平虽有升高 ,但升高的幅度不及排卵鱼。这种血清GTH水平的急剧增高对诱导南方鲶卵母细胞最后成熟和排卵具有重要作用。 相似文献
17.
The disease resistance and humoral immunomodulatory effects of vitamin C administered orally to grouper,Epinephelus awoara maintained on a frozen fish diet supplemented with vitamin C at 500, 1000, 1500 and 2000 mg/kg were investigated. After 20
weeks, the growth rates of the groups with high level of vitamin C apparently increased. The untreated fish had symptoms of
vitamin C deficiency. The endogenous liver tissue vitamin C levels were found to reflect well the dietary treatments. After
intraperitoneal injection or bath challenge with a virulent strain ofVibrio vulnificus, fish fed with high level vitamin C showed significantly higher survival rate compared with the normal control group. Vaccination
with formalin inactivatedV. vulnificus significantly enhanced the specific antibody production in fish treated with vitamin C, and completely protected from strong
bacterial challenge the groups fed on fish with vitamin C 1500 and 2000 mg/kg diet.
Project 39500113 supported by NSFC and also by Guangdong Science Research Foundation (Grant No. 950711). 相似文献
18.
Qiuxing Cai Yanyan Wu Laihao Li Yueqi Wang Xianqing Yang Yongqiang Zhao 《中国海洋大学学报(英文版)》2017,16(5):855-862
Lipid oxidation in salt-dried yellow croaker (Pseudosciaena polyactis) was evaluated during processing with commonly used analytical indices, such as the peroxide value (POV), the thiobarbituric acid reactive substances (TBARS) value, and oxidative-relative lipoxygenase (LOX) activity. Additionally, fatty acids were analyzed using gas chromatography-mass spectrometry. Both POV and TBARS increased significantly (P < 0.05) at the rinsing stage. POV reached its peak value of 3.63 meq O2 per kg sample at the drying stage, whereas TBARS constantly increased from 0.05 to 0.20 mg MDA per kg sample. Processing of salt-dried yellow croaker had an extremely significant (P < 0.01) effect on LOX activity. Twenty-six fatty acids were identified. Combined eicosapentaenoic acid (EPA; C20:5n3) and docosahexaenoic acid (DHA; C22:6n3) content varied between (19.20 ± 0.37) mg g?1 and (23.45 ± 1.05) mg g?1. The polyunsaturated fatty acid/saturated fatty acid (PUFA/SFA) ratio in yellow croaker was 0.73–1.10, and the n-6/n-3 PUFA ratio was approximately 0.13–0.20. The contents of most fatty acids varied significantly (P < 0.05) during the different processing stages, and these differences were caused by lipid oxidation. C18:0, C16:1n7, C19:0, and C22:6n3 showed clear changes in principle component one of a principle components analysis. These fatty acids are potential markers for evaluating lipid oxidation in fish muscle because there was a significant correlation between these markers and TBARS and LOX activity (P < 0.05) with Pearson’s coefficients > 0.931. 相似文献