鸡新城疫CS2实验疫苗的生产及鉴定

应用ＳＰＦ鸡胚生产出３批ＣＳ２实验疫苗，疫苗的病毒价≥１０８．５ＥＬＤ５０／ｍｌ。对２月龄小鸡的最低免疫量（ＭＩＤ）为３～３０ＥＬＤ５０。据此，作者们建议对此种小鸡的实用免疫剂量为１０５ＥＬＤ５０。对这３批疫苗的实验结果显示：１０倍的剂量（即１０６ＥＬＤ５０）对鸡不引起任何不正常现象。免疫持续期达１２个月以上。在２～８℃和－１５℃中分别保存９和２４个月效力不变。     

牛病毒性腹泻/黏膜病(1型+2型)、牛传染性鼻气管炎、牛副流感(3型)三联灭活疫苗(E2蛋白+C1株+HB01株)的研制与免疫效果评价

采用CHO细胞表达牛病毒性腹泻/黏膜病病毒1型（BVDV1）E2蛋白,采用杆状病毒重组表达牛病毒性腹泻/黏膜病病毒2型（BVDV2）E2蛋白,采用MDBK细胞微载体悬浮培养技术培养牛传染性鼻气管炎病毒（IBRV）和牛副流感病毒3型（BPIV3）,收获蛋白表达产物和细胞培养物,经纯化、灭活后与605佐剂混合,制备牛病毒性腹泻/黏膜病(1型+2型)、牛传染性鼻气管炎、牛副流感(3型)三联灭活疫苗(E2蛋白+C1株+HB01株)。将疫苗免疫健康易感牛进行免疫效果评价,结果表明该产品免疫效果良好,免疫牛IBRV和BPIV3中和抗体效价均可达到1∶77以上;BVDV1和BVDV2 E2蛋白琼扩抗体效价均可达到1∶32以上;免疫牛攻毒保护率均可达到4/5以上。     

猪繁殖与呼吸综合征疫苗的研究进展

猪繁殖与呼吸综合征(PRRS)是由猪繁殖与呼吸综合征病毒(PRRSV)引起的严重危害世界养猪业的一种传染病,该病可造成猪的繁殖障碍、呼吸系统病症与生长受阻。本文着眼于PRRSV疫苗的免疫原性、保护效力和安全性,涉及市场上现有的商品化疫苗与已报道的处于试验阶段的相关疫苗研究成果,以期为PRRSV的防控与疫苗研发提供有益的参考。     

Protectivity conferred by immunization with intranasal recombinant outer membrane protein H from Pasteurella multocida serovar A:1 in chickens

Recombinant outer membrane protein H (rOmpH) is a potential fowl cholera vaccine candidate. The present study was aimed at developing rOmpH formulations for intranasal administration. The rOmpH was purified and formulated with either Escherichia coli enterotoxin B (LTB) or CpG oligodeoxynucleotides (ODN) as an adjuvant. Antibody responses in chickens intranasally immunized with rOmpH in combination with 2 different adjuvants were significantly increased (P<0.05) post immunization. Chicken survival rates showed that rOmpH formulated with ODN and LTB elicited 90% and 70% protection, respectively. Our findings indicated that rOmpH formulated with ODN elicited protection better than that formulated with LTB. Therefore, the vaccines formulations in the present study can be considered new intranasal vaccine formulations for fowl cholera in chickens.     

Recurrent Temporary Paralysis Reported After Human Rabies Post‐Exposure Prophylaxis

Adverse events can occur after rabies post‐exposure prophylaxis (PEP), and linkage to causality is often difficult to determine. We report a case of recurrent temporary paralysis that began immediately after the initiation of rabies PEP in a man exposed to a bat. The recurrent temporary paralysis first occurred in the patient after his initial dose and then again after day 3 of his rabies PEP. The PEP was terminated prior to a serologic response. The patient continued to experience numerous discrete episodes of temporary paralysis for over two years.     

Efficacy of lipopolysaccharide antigen of Yersinia ruckeri in rainbow trout by intraperitoneal and bath immersion administration

In this study, Intraperitoneal (IP) and bath immersion (BI) vaccine trials were conducted in fish with a mean weight of 6.3 g. Rainbow trout vaccinated with lipopolysaccharide (LPS) was 50 mg/L protein concentration and challenged by IP injection with 9.8 × 10⁶ cell/ml of Yersinia ruckeri at 45 days post-immunization had a relative percent survival (RPS). To obtain an effective bath immersion vaccine against yersiniosis, LPS preparation was obtained from the Y. ruckeri and with the LPS antigen. After 28 and 60 days vaccinated fish with first and second immunizations by LPS were challenged via intraperitoneal injection with 9.8 × 10⁶ cell/ml of Y. ruckeri for evaluating the mortality rates and calculating the relative percentage of survival (RPS). RPS value of experimental groups, which was significantly (P < 0.05) larger than that of the control group.     

高效液相色谱法测定杨树花口服液中水杨苷的含量

建立了高效液相色谱分离测定杨树花口服液中水杨苷含量的方法。采用Waters XBridge C18色谱柱（150mm×4．6mm,5μm）,以甲醇-水（10：90）为流动相,流速为1．0mL／min,检测波长269nm,柱温30℃。水杨苷的线性范围为0．025～0．5mg／mL（r=0．9995）,平均加样回收率（n=6）为100．8％,RSD为1．49％。建立的方法准确、快速,操作简便,可用于杨树花口服液中水杨苷的含量测定。     

国内商品化猪圆环病毒疫苗的现状及展望

截至2013年12月份,已有16家企业6种不同的猪圆环病毒2型灭活疫苗获得了农业部的注册,其中有批签发的企业14家。整理了猪圆环病毒疫苗在我国的商品化情况,分类总结了该类疫苗工艺核心等基本情况,同时分析了猪圆环疫苗的优缺点,并对猪圆环病毒疫苗的发展前景进行了展望。     

鸡致病性大肠杆菌油乳剂灭活苗的制备

从山西某地3家鸡场分离出6株鸡大肠杆菌。将分离菌株分别接种试验动物,对小白鼠致死率达83.33%。选择全部致死小白鼠的菌株制成每毫升含100亿个大肠杆菌的油乳剂灭活苗。经试验证明,本疫苗安全、有效。每只鸡免疫接种0.5mL,临床无不良反应,对地方性鸡大肠杆菌病有较好的预防作用。     

Vaccine-associated granulomatous inflammation and melanin accumulation in Atlantic salmon, Salmo salar L., white muscle

The purpose of this study was to investigate the nature of variably sized pigmented foci encountered in fillets of farmed Atlantic salmon, Salmo salar L. The material was sampled on the fillet production line and on salmon farms from fish with an average size of 3 kg from various producers. The fish had been routinely vaccinated by injection. Gross pathology, histology, immunohistochemistry using antisera against major histocompatibility complex (MHC) class II beta chain and transmission electron microscopy (TEM) were used to characterize the changes. Macroscopically, melanized foci were seen penetrating from the peritoneum deep into the abdominal wall, sometimes right through to the skin, and also embedded in the caudal musculature. Histological investigation revealed muscle degeneration and necrosis, fibrosis and granulomatous inflammation containing varying numbers of melano-macrophages. Vacuoles, either empty or containing heterogeneous material, were frequently seen. The presence of abundant MHC class II+ cells indicated an active inflammatory condition. TEM showed large extracellular vacuoles and leucocytes containing homogeneous material of lipid-like appearance. The results showed that the melanized foci in Atlantic salmon fillet resulted from an inflammatory condition probably induced by vaccination. The described condition is not known in wild salmon and in farmed salmon where injection vaccination is not applied.