细菌性败血症流行后翘嘴鳜血清中抗体特性分析

从细菌性败血症流行后的饲养池中捕捞翘嘴鳜,采集血清,以嗜水气单胞菌的福尔马林灭活菌体,菌体脂多糖,精制ＬＰＳ和胞外产物为反应抗原,对其抗体特性进行了分析。结果表明,受检翘嘴鳜血清中对Ｆ－ＬＰＳ和ＬＰＳ的平均凝集抗体效价分别为１：１９１和１：６９,对ＬＰＳ和Ｐ－ＬＰＳ在琼脂内扩散反应后分别出现４条以上和１条沉降线,而对ＥＣＰ则未出现沉降线;免疫电泳后,对ＬＰＳ和Ｐ－ＬＰＳ分别出现５条以上和２条沉降线     

鲢细菌性败血症病原的研究

从患细菌性败血症的鲢肝脏中分离到一菌株，编号青１－２－３。通过代感染试验，发病症状与自然病鱼基本一致，对致病菌株进行细菌学鉴定为嗜水气单胞菌。青１－２－３的生化表型不同于银鲫病原，为致病性嗜水气单胞菌的不同菌株。     

O78败血型犊牛大肠杆菌的分离和鉴定

从发病犊牛体内分离到一株病原细菌,经微生物学鉴定表明为O78血清型的败血型犊牛大肠杆菌。     

鸡波氏杆菌的毒力试验

本文介绍了鸡波氏杆菌对鸡胚、雏鸡、小白鼠、幼兔的毒力试验。结果表明，鸡波氏杆菌可致鸡胚、雏鸡、幼兔、小白鼠发病、病程为急性经过，呈出血性败血症病变，从病程和病变可看出，鸡胚、幼雏、家兔的日龄与抵抗力成正相关、1月龄以上的鸡有较强抵抗力，呈隐性带菌，通过成年兔，豚鼠的汞氏皮内反应表明鸡波氏 力可产生毒性很强的坏死毒素。     

兽药典收载羊败血性链球菌病疫苗生产检验用菌种的系统分类鉴定

根据现有细菌分类鉴定方法,采用血清学、Biolog、16S rRNA序列分析和全基因组序列分析等方法对羊败血性链球菌病疫苗生产检验用菌种CVCC 553、55001和55002进行系统鉴定。结果显示,菌种CVCC 553、55001和55002血清群为兰氏C群;Biolog鉴定为马链球菌反刍亚种;16S rRNA序列分析与马链球菌反刍亚种模式菌株CECT 5772的同源性最高(均为99.72%),且在系统发育树中位于同一分支;与马链球菌反刍亚种模式菌株CCUG 47520的DNA-DNA的杂交值大于70%,分别为80.5%、80.2%、80.5%,与马链球菌反刍亚种模式菌株CECT 5772的平均核苷酸同源性分别为97.73%、97.64%、97.77%。因此本研究认为羊败血性链球菌病疫苗生产用菌种CVCC 553、55001和55002应为马链球菌反刍亚种。     

Actinobacillus sp. bacteremia in foals: clinical signs and prognosis

Medical records of 101 blood culture-confirmed bacteremic foals were reviewed to determine whether foals with Actinobacillus sp. bacteremia are affected at an earlier age, have more severe signs of disease, and have a worse prognosis than do foals with bacteremia of other causes. Thirty percent (30/101) of bacteremic foals had Actinobacillus sp. cultured, and these were 2 times more likely to die (crude odds ratio [OR(CR)] 0.8, 4; P = .14), with a survival rate of 43% (13/30) compared to the overall survival rate of 55% (56/101). When compared to other bacteremic foals, foals with actinobacillosis were 7 times more likely to have been sick from birth (adjusted odds ratio [OR(ADJ)] 2, 26; P = .003) and 6 times more likely to have diarrhea (OR(ADJ) 1, 22; P = .009). By bivariate analysis. foals with Actinobacillus sp. bacteremia were 5 times more likely to have a sepsis score >11 (OR(CR) 1, 18; P = .007), 6 times more likely to be obtunded (OR(CR) 2, 20; P = .005), and 3 times more likely to have pneumonia (OR(CR) 1, 7; P = .03). Furthermore, Actinobacillus sp. bacteremic foals were 27 times more likely to have a segmented neutrophil count <3.3 X 10(9) cells/L (OR(ADJ) 4, 166: P < .0001) and were 4.5 times more likely to have a band neutrophil count >0.46 x 10(9) cells/L (OR(ADJ) 1, 17; P = .02) when compared to foals that had bacteremia caused by either gram-negative enteric or gram-positive organisms. Sepsis score was < or = 11 in 49% (29/59) of bacteremia foals aged <13 days for which a discernible sepsis score was calculable. Results of this study should improve the diagnostic sensitivity of clinical examinations of neonatal foals, thereby facilitating treatment decisions.     

斑鳢细菌性败血症病原菌的分离与鉴定

由患细菌性败血症的斑鳢分离到１１株菌,根据直接荧光抗体法鉴定结果,对其中７株菌的菌落特性进行了观察,分析了菌株的生化特性,并测试了其对斑鳢、乌鳢和鲫的致病力。结果证明,斑鳢的细菌性败血症是由嗜水气单胞菌（Ａｅｒｏｍｏｎａｓｈｙｄｒｏｐｈｉｌａ）引起的     

鳗鲡疱疹病毒的分离与鉴定

为获知鳗鲡"脱粘败血病"与病毒的关系,实验用蔗糖密度梯度离心的方法从发病的欧洲鳗鲡内脏器官组织匀浆液中纯化了病毒粒子,负染后利用电镜观察;进一步用EO细胞对病毒进行了分离、培养,并对感染病毒的细胞进行超薄切片,电镜观察;然后,提取病毒DNA,利用鳗鲡疱疹病毒的PCR检测方法对其进行了鉴定。结果显示,接种匀浆上清液的EO细胞出现细胞融合的病变效应;分离病毒的病毒粒子具囊膜,大小约为200 nm;从感染病毒的细胞上清液DNA中扩增出特异性条带,序列测定与比对分析表明,该序列与鳗鲡疱疹病毒欧洲株(AngHV-1)的序列完全一致。研究表明,利用EO细胞分离了一株鳗鲡病毒,经形态观察和DNA分析,确认该病毒为鳗鲡疱疹病毒,命名为AngHV-FJ。该研究为深入开展鳗鲡疱疹病毒的致病机制及鳗鲡"脱粘败血病"的防控研究奠定了重要基础。     

甘草素在翘嘴鳜细菌性败血症疫苗中的佐剂效果

从甘草中提取的甘草素（Ｇｌｙ）添加在翘嘴鳜细菌性败血症２种疫苗中的佐剂,即福尔马林知嗜水气单胞菌（ＦＫＣ）菌体脂多糖（ＬＰＳ）中,经添加Ｇｌｙ的疫苗接种后,受免翘嘴鳜头肾中白细胞的吞噬活性和经活菌改毒后的免疫保护率显高于本活加Ｇｌｙ疫苗的免疫组（ｔ测验,Ｐ〈０．０５）,表明了Ｇｌｙ具有佐剂效果,但是受兔鱼的凝集抗体效价和补体活性在全部受兔鱼中则没有明显差别（ｔ检测,Ｐ〉０．０５）。