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Managemental Factors Influencing Anestrus Problems in Dairy Cows 影响奶牛发情问题的管理因素
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000393
Soniya Akter Nishi, Md. Jalal Uddin Sarder, Md. Hemayatul Islam, Md. Josim Uddin, Shyla Sharmin
This study was carried out to determine the prevalence of anestrus problems in Dairy cows associated with managemental factors such as housing system, feed quality, deworming and health management of dairy cows. Data were collected by interviewing the owner of the cows using questionnaires from selected private dairy farms and Rajshahi Dairy and Cattle Improvement Farm (RDCIF) at Rajshahi district during the period from January 2016 to December 2016. A total of 500 dairy cows were surveyed to find out the prevalence of anestrus problems in relation to housing system,feed quality,deworming and health management of cows. The raw data were then sorted, computed, coded and statistically analyzed with the help of latest version of SPSS statistics software package. Our findings revealed that, the overall prevalence of anestrus in cows was 40.2%. The housing system, feed quality, deworming and health management of cows influenced the prevalence of anestrus in cows. The prevalence of anestrus was the highest in poor housing system (45.16%) and the lowest in good housing system (36.17%). The prevalence of anestrus was not significantly (P>0.05) influenced by the housing systems. Good quality of feed showed the lowest occurrence of anestrus problems (28.82%) and poor quality of feed showed the highest occurrence of anestrus problems (78.72%). The prevalence of anestrus in dairy cows was significantly (P<0.05) influenced by the feed quality of cows. It was observed that the incidence of anestrus was higher in no deworming measure of farm (56.96%) and lower was in regular deworming measure of farm (29.64%).  The prevalence of anestrus was higher in no preventive measure of dairy cows (50.95%) and lower was in regular preventive measure of dairy cows (29.92%). Deworming and preventive measures had also significant (P<0.05) effect on anestrus problems in dairy cows.
本研究旨在确定奶牛房舍系统、饲料质量、驱虫和奶牛健康管理等管理因素对奶牛发情问题的影响。在2016年1月至2016年12月期间,通过对Rajshahi地区选定的私人奶牛场和Rajshahi奶牛改良场(RDCIF)的奶牛所有者进行问卷调查,收集数据。通过对500头奶牛的调查,了解奶牛的房舍系统、饲料质量、驱虫和健康管理等方面的发情问题。利用最新版SPSS统计软件包对原始数据进行整理、计算、编码和统计分析。我们的研究结果显示,奶牛的总体发情率为40.2%。奶牛的饲养制度、饲料质量、驱虫和卫生管理对奶牛发情有影响。住房条件较差的地区早泄发生率最高(45.16%),住房条件较好的地区最低(36.17%)。住房制度对早发率无显著影响(P>0.05)。质量好的饲料出现退情问题的比例最低(28.82%),质量差的饲料出现退情问题的比例最高(78.72%)。奶牛饲料质量显著影响奶牛的早泄发生率(P<0.05)。结果表明,未驱虫的农场发情率较高(56.96%),定期驱虫的农场发情率较低(29.64%)。未采取预防措施的奶牛发情率较高(50.95%),有预防措施的奶牛发情率较低(29.92%)。驱虫和预防措施对奶牛的去势问题也有显著影响(P<0.05)。
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引用次数: 3
Study of the Immune Response to Hepatitis B Virus Vaccine among Healthy Vaccinated Students in Khartoum, Sudan 苏丹喀土穆健康接种乙肝疫苗的学生对乙肝病毒疫苗免疫反应的研究
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000388
B. M. T. Gorish, Marwa Almakki, S. Ahmed, S. Mohammed, F. Saleh, F. Mohammed, M. Mohammed, S. Ibrahim
The aim of this study was to describe the immune response to HBV vaccine among healthy, vaccinated Academy of Health Science students in Khartoum state. A total of eighty one samples (n=81) were obtained from healthy vaccinated students, the samples were involving 12 (14.2%) males and 69 (85.8%) female. The mean of Age (years), Weight (kg), TWBCs (cell/μl) and differential lymphocytes count (%) were 22.22 ± 1.1 year, 58.42 ± 12.5 kg, 5.8 ± 1.7 cell/μl and 38.6 ± 9% respectively. 2.5 ml blood sample was collected from each student in EDTA blood container. TWBCs and differential lymphocytes count were measured from whole blood by using Sysmex Haematological analyzer, and then the plasma was separated from whole blood by centrifugation at 3000 RPM for 5 min. All plasma samples were examined for the presence of anti-HBsAg using Enzyme Linked Immune Sorbent Assay (ELISA). The results showed that out of 81 blood samples investigated, 80 (98.77%) were positive for anti HBsAg while only one (1.23%) was negative. The mean of ELISA reading in the male was higher than female 2.7005 and 2.668 respectively, and there is insignificant effect of gender, weight, TWBCs and differential lymphocytes count in the immune response to HBV vaccine with p value 0.675, 0.070, 0.092 and 0.604 respectively. The study concluded that all most all students produced antibody immune response to HBV vaccine and there are variations in ELISA readings. Further studies with more sample size and by using more advanced technique (quantitative ELISA) should be done to clarify the results.
本研究的目的是描述喀土穆州健康的、接种过乙肝疫苗的卫生科学学院学生对乙肝疫苗的免疫反应。从健康接种疫苗的学生中获得81份样本(n=81),其中男性12份(14.2%),女性69份(85.8%)。年龄(years)、体重(kg)、twbc (cells /μl)和淋巴细胞差异计数(%)的平均值分别为22.22±1.1岁、58.42±12.5 kg、5.8±1.7 cells /μl和38.6±9%。每个学生在EDTA血液容器中采集血样2.5 ml。采用Sysmex血液学分析仪测定全血中twbc和淋巴细胞的差异计数,然后将血浆与全血分离,3000 RPM离心5 min,采用酶联免疫吸附试验(ELISA)检测血浆中是否存在抗hbsag。结果81份血液样本中,抗HBsAg阳性80份(98.77%),阴性1份(1.23%)。男性的ELISA读数平均值分别高于女性的2.7005和2.668,性别、体重、twbc和差异淋巴细胞计数对HBV疫苗免疫应答的影响不显著(p值分别为0.675、0.070、0.092和0.604)。该研究得出结论,所有学生对乙肝疫苗产生抗体免疫反应,且ELISA读数存在差异。进一步的研究需要更多的样本量和更先进的技术(定量ELISA)来澄清结果。
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引用次数: 1
Knowledge and Competencies of Vaccinators on Routine Childhood Vaccination in Ghana 加纳常规儿童疫苗接种接种员的知识和能力
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000389
D. Ansong, F. Osei, A. Enimil, K. Boateng, I. Nyanor, E. X. Amuzu, A. Owusu, Nicholas Mensah Karikari
Background: The Expanded Programme on Immunization (EPI), since its inception in 1974, has helped avert about 2-3 million deaths annually. In Ghana, there is inadequate information on the transition from knowledge acquired in the classroom to practice among vaccinators. This study seeks to provide evidence on the level of knowledge and competencies of vaccinators in Ghana. Method: A prospective cross-sectional study with consecutive sampling technique was employed to select 110 eligible subjects from health facilities in two districts in the Ashanti region of Ghana. Data were collected in real time using standardised tools, uploaded on the Open Data Kit (ODK), and subsequently exported to STATA 13.0 for statistical analysis. Results: Seventy two percent (72.73%) of respondents were from urban health facilities. Community Health Nurses constituted majority of respondents 83.09%. Sixty-five percent (65.46%) of participants had less than five years’ experience in vaccination. BCG was correctly identified by 91.82% of respondents as a single dose vaccine and yellow fever by 89.09%. Pentavalent, rotavirus and pneumococcal vaccine were correctly identified by 91.82%, 82.73% and 82.73% respectively as multiple dose vaccines. Ninety seven percent (97.27%) of respondents correctly mentioned pentavalent as having its first dose administered at 6 weeks. 98.18% correctly indicated pentavalent and pneumococcal as given intramuscularly whereas 92.27% identified OPV and rotavirus as given orally. Eighty-eight percent (88.18%) of respondents knew vaccine temperature charting is required twice a day. Conclusion: The study revealed gaps in the principles of vaccine handling and administration. A critical need for routine assessment and refresher training for population where vaccination is conducted by different level of training.
背景:扩大免疫规划自1974年成立以来,每年帮助避免了约200万至300万人死亡。在加纳,关于将课堂知识转化为接种人员实践的信息不足。本研究旨在为加纳接种员的知识水平和能力提供证据。方法:采用前瞻性横断面研究,采用连续抽样技术,从加纳阿散蒂地区两个地区的卫生机构中选择110名符合条件的受试者。使用标准化工具实时收集数据,上传到开放数据工具包(ODK),随后导出到STATA 13.0进行统计分析。结果:72%(72.73%)的被调查者来自城市卫生机构。社区卫生护士占多数(83.09%)。65%(65.46%)的参与者接种疫苗的经验少于5年。91.82%的应答者正确识别卡介苗为单剂疫苗,89.09%的应答者正确识别黄热病为单剂疫苗。五价疫苗、轮状病毒疫苗和肺炎球菌疫苗为多剂量疫苗的正确率分别为91.82%、82.73%和82.73%。97%(97.27%)的应答者正确地提到五价在6周时给予第一剂。98.18%的人正确指出五价和肺炎球菌是肌肉注射,而92.27%的人正确指出口服口服脊髓灰质炎病毒和轮状病毒。88%(88.18%)的应答者知道每天需要做两次疫苗温度表。结论:该研究揭示了疫苗处理和给药原则方面的差距。迫切需要对通过不同级别培训进行疫苗接种的人群进行常规评估和进修培训。
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引用次数: 0
Safety and Immunogenicity of Rift Valley Fever MP-12 and a Novel arMP-12?NSm21/384 Recombinant Vaccine Candidate in Native Breed of Black Head Sheep (Ovis aries) from Tanzania 裂谷热MP-12和新型腋窝-12的安全性和免疫原性?坦桑尼亚本地黑头羊品种NSm21/384重组候选疫苗的研究
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000394
Adamson Ek, Nyundo Sb, Rowl, Pedro Palermo, M. Matiko, Bettinger Ge, P. Wambura, J. Morrill, D. Watts
Objective: Rift Valley fever (RVF) is a mosquito-borne zoonotic viral disease that affects humans and ruminants in Africa and the Arabian Peninsula. Efforts to develop effective vaccines have had limited success. Therefore, the aim of this study was to evaluate the safety and immunogenicity of RVF MP-12, and arMP-12ΔNSm21/384 vaccine candidates in sheep. Methods: One group of 6 sheep was vaccinated intramuscularly (IM) each with one ml of 1×105 PFU/ml of the RVF MP-12 and 9 sheep were inoculated IM each with one ml of the arMP-12ΔNSm21/384 vaccine candidate, and two control sheep received one ml each of only Eagle's Minimum Essential Medium. Blood samples obtained on days 14 and 0 before vaccination and on days 3, 4, and 5 post vaccination (PV) were tested for RVFV in Vero cells and by RT PCR assay, and samples collected at interval PV through day 87 and on days 7, 14 and 21 following revaccination on day 87 PV to test for RVFV neutralizing antibody response by the plaque reduction neutralization test. Results: All animals, including the controls remained in good health during the PV period as supported by normal body temperature, and the absence of clinical manifestations throughout this study. A viremia was not detected in any of the animals. Six of 6 animals that received the RVF MP-12 and 8 of 9 animals that received the arMP-12ΔNSm21/384 had antibody titers that ranged from 1:10 on day 5 PV to as high as 1:40 to 1:160 through day 87 PV. The antibody titers for these 15 animals following revaccination on day 87 PV with 1×104 PFU/ml of the MP-12 vaccine increased rapidly and by day 21 PV the titers for most animals ranged from 1:160 to 1:640. Conclusion: Overall, these findings based on a limited number of sheep indicated that both the MP-12 and the arMP-12ΔNSm21/384 are promising vaccine candidates for the prevention of RVF in sheep in Africa.
目的:裂谷热(RVF)是一种影响非洲和阿拉伯半岛人类和反刍动物的蚊媒人畜共患病毒性疾病。开发有效疫苗的努力取得了有限的成功。因此,本研究的目的是评估裂谷热MP-12和arMP-12ΔNSm21/384候选疫苗在绵羊中的安全性和免疫原性。方法:每组6只羊肌内注射1 ml 1×105 PFU/ml裂谷热MP-12疫苗,每组9只羊肌内注射1 ml arMP-12ΔNSm21/384候选疫苗,对照组2只羊只注射1 ml Eagle’s Minimum Essential Medium。在疫苗接种前第14天和第0天以及疫苗接种后第3、4和5天采集的血液样本在Vero细胞中进行RVFV检测和RT PCR检测,并在疫苗接种间隔至第87天以及第87天再次接种疫苗后第7、14和21天采集样本,通过斑块减少中和试验检测RVFV中和抗体反应。结果:所有动物(包括对照组)在PV期间身体状况良好,体温正常,在整个研究过程中均无临床表现。没有在任何动物身上检测到病毒血症。6只接受裂谷热MP-12的动物中有6只和9只接受arMP-12ΔNSm21/384的动物中有8只的抗体滴度从第5天的1:10到第87天的1:40至1:160不等。这15只动物在PV第87天再次接种1×104 PFU/ml MP-12疫苗后,抗体滴度迅速增加,到PV第21天,大多数动物的滴度在1:160至1:640之间。结论:总的来说,这些基于有限数量绵羊的研究结果表明,MP-12和arMP-12ΔNSm21/384都是预防非洲绵羊裂谷热的有希望的候选疫苗。
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引用次数: 2
Development of In-vitro Assays to Estimate Rabies Viral Protein in Vaccine Preparation 狂犬病疫苗制备中狂犬病病毒蛋白体外检测方法的建立
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000392
T. Sekar, G. C. Mohan, C. Palaniappan, A. Premkumar, B. Sundaran, B. Sekar
Vaccine against rabies is prepared by cell culture technology and these vaccines are free from many side effects when compared to nerve tissue vaccines. The vaccine production is a continuous process involving propagation of virus, harvesting, concentration, inactivation, purification and formulation with preservatives. The quantification of viral protein in the intermediate biological product is an in-process quality control test to reduce the product loss during various process of vaccine manufacturing. The conventional in-vivo & in-vitro tests employed for the quantification of rabies viral protein are time consuming, laborious and requires laboratory animals. In this study, we attempted to develop in-house serological methods such as sandwich ELISA, Dot Blot for the detection and quantification of rabies antigen in the intermediate biological material during vaccine preparation. The hyper immune sera was prepared by immunizing two animal models i.e. Guinea Pigs and rabbits with standard Rabies antigen. The sera samples were purified by saturated ammonium sulphate precipitation and further by G50 gel column. The antirabies antibody titre in the purified preparation was estimated using Rapid Fluorescent Focus Inhibition Test (RFFIT). National Reference Rabies Vaccine received from Central Drug Laboratory, Kasauli was used to prepare the local reference standard and it was included in the in-house serological methods to validate the assay. Our in-house tests are found to be simple, rapid and cost effective and require less time when compared to in-vivo animal challenge and cell culture based in-vivo tests.
狂犬病疫苗是通过细胞培养技术制备的,与神经组织疫苗相比,这些疫苗没有许多副作用。疫苗生产是一个连续的过程,涉及病毒繁殖、收获、浓缩、灭活、纯化和使用防腐剂配制。中间生物制品中病毒蛋白的定量检测是为了减少疫苗生产过程中产品的损失而进行的过程中质量控制试验。用于狂犬病病毒蛋白定量的常规体内和体外试验耗时、费力且需要实验动物。在本研究中,我们尝试开发内部血清学方法,如夹心ELISA、Dot Blot,用于疫苗制备过程中中间生物材料中狂犬病抗原的检测和定量。用标准狂犬病抗原免疫豚鼠和家兔两种动物模型制备高免疫血清。样品经饱和硫酸铵沉淀纯化,G50凝胶柱进一步纯化。采用快速荧光聚焦抑制试验(RFFIT)测定纯化物的抗狂犬病抗体滴度。使用从卡绍利中央药物实验室获得的国家狂犬病参考疫苗制备当地参考标准,并将其纳入内部血清学方法以验证该分析。与体内动物激发和基于细胞培养的体内测试相比,我们的内部测试简单、快速、经济高效,所需时间更少。
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引用次数: 1
A Review of Determinants of Low Measles Immunization and FeasibleInterventions to Increase Uptake among Children Aged 9-59 months inthe Lawra District, Ghana 加纳Lawra地区麻疹低免疫率的决定因素和提高9-59个月儿童接种率的可行干预措施综述
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000395
Kuuzagr Rn, Raouf Alebshehy, N. Ms, Jato Dm, D. Barffo
Vaccine preventable diseases contribute to about 20% of all under-five deaths globally. Annually, about 10% of un-immunized children die of measles globally. Developing countries continue to experience frequent Measles outbreaks despite numerous preventive measures. Measles is one of the vaccine preventable diseases targeted by the World Health Organization for elimination by 2020. Measles remains the top killer among children in SubSaharan Africa despite global progress to eliminate the disease through vaccination. Even though there is a vaccine against this disease, most countries still report low measles immunization coverages. The main aim of this review is to analyse the determinants of low measles uptake in Lawra district and recommend appropriate measures to solve this problem. An in-depth review was conducted using literature, both peer-reviewed and grey literature from 2000. The literature was retrieved from databases (PubMed, Global health, Popline) and also through the Google scholar search engine. A conceptual framework was adapted to guide the analysis of the factors affecting measles immunization coverage in Lawra district. Inadequate data from the district for comparison was a major limitation and thus further research is recommended. Out of the ninety five studies (95) that met the inclusion criteria, 85 (89%) were peer reviewed. The main factors influencing low measles immunization coverage in Lawra include the quality of immunization services, attitude of health workers, inaccessibility to services and the social class of the caregivers. Feasible intervention strategies recommended include mass media, home visits, effective supervision and partnership between the health system and the communities.
疫苗可预防疾病占全球五岁以下儿童死亡总数的20%左右。全球每年约有10%未接种疫苗的儿童死于麻疹。尽管采取了许多预防措施,发展中国家仍然经常爆发麻疹。麻疹是世界卫生组织在2020年消灭的疫苗可预防疾病之一。尽管全球在通过疫苗接种消除麻疹方面取得了进展,但麻疹仍然是撒哈拉以南非洲儿童的头号杀手。尽管有针对这种疾病的疫苗,但大多数国家报告的麻疹免疫覆盖率仍然很低。本综述的主要目的是分析Lawra地区麻疹低吸收率的决定因素,并建议解决这一问题的适当措施。我们利用2000年以来的文献,包括同行评议文献和灰色文献,进行了深入的综述。文献从数据库(PubMed, Global health, Popline)和谷歌学者搜索引擎中检索。调整了一个概念框架,以指导对劳拉县麻疹免疫覆盖率影响因素的分析。该地区用于比较的数据不足是主要限制,因此建议进一步研究。在符合纳入标准的95项研究中,85项(89%)进行了同行评议。影响Lawra麻疹免疫覆盖率低的主要因素包括免疫服务的质量、卫生工作者的态度、难以获得服务以及护理人员的社会阶层。建议的可行干预战略包括大众媒体、家访、有效监督以及卫生系统与社区之间的伙伴关系。
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引用次数: 1
Extensive Limb Swelling after Td Vaccination in a Pregnant Woman 孕妇接种破伤风疫苗后大面积肢体肿胀
Pub Date : 2018-01-01 DOI: 10.4172/2157-7560.1000390
F. Akcam
Introduction: Immunization is an indisputable necessity for personal and public health. Unfortunately, vaccines protecting people from disease can sometimes lead to unwanted side effects. Case Report: A 29-year old female at 21 weeks pregnant presented at our clinic with a painful swelling in the left forearm. The patient history revealed that tetanus (Td) vaccine had been applied to the left arm deltoid region at a health center one week previousy. On physical examination, the left deltoid region was tender to palpation with limited abduction, but there was no warmth, redness orswelling. Swelling (about 15 × 10 cm diameter) was observed throughout the left forearm. The patient was assessed as having vaccine-related adverse side effects, and the case was reported to the Adverse Effects Monitoring Committee commission of the province. Limb elevation and antiinflammatory treatment were recommended. At follow-up 1 week later, the lesion had regressed completely. Discussion: Most side effects from repeated Td vaccination are mild or moderate, and self-resolving. The most common side effects include erythema, swelling, pain, and tenderness at the injection site, body-ache, fatigue, or fever. Extensive limb swelling due to tetanus vaccine has been reported in children. To our knowledge, the present case is the first reported otherwise healthy pregnant woman with swelling distant from the vaccine injection site.
免疫接种对于个人和公共健康是无可争辩的必要。不幸的是,保护人们免受疾病侵害的疫苗有时会导致不必要的副作用。病例报告:一名怀孕21周的29岁女性因左前臂疼痛肿胀来到我们诊所。病史显示,1周前曾在卫生院接种过左臂三角肌破伤风疫苗。查体时,左侧三角肌区触痛,外展有限,但无发热、红肿。左前臂肿胀(直径约15 × 10 cm)。经评估,该患者存在与疫苗有关的不良副作用,并将该病例报告给省不良反应监测委员会。推荐肢体抬高及抗炎治疗。随访1周后,病变完全消退。讨论:重复接种破伤风疫苗的大多数副作用是轻度或中度的,并可自行消退。最常见的副作用包括注射部位的红斑、肿胀、疼痛和压痛、身体疼痛、疲劳或发烧。儿童接种破伤风疫苗后出现大面积肢体肿胀。据我们所知,本病例是第一例在远离疫苗注射部位出现肿胀的健康孕妇。
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引用次数: 0
Lipid Peroxidation and Antioxidant System in Erythrocytes of Brucella Vaccinated and Challenged Goats 布氏菌免疫和攻毒山羊红细胞脂质过氧化和抗氧化系统的研究
Pub Date : 2017-12-14 DOI: 10.15406/IJVV.2017.04.00092
Amit Kumar, V. Gupta, A. Verma, M. Rajesh, Il., A. Rahal, S. Yadav
Brucellosis is a reemerging worldwide zoonotic disease and the occurrence of the disease in humans is largely dependent on the animal reservoir [1]. In human it is mainly caused by Brucella melitensis. The highest rate of human infection is mainly in those areas where rates of brucellosis in sheep and goats are high [2,3] as sheep and goats are main reservoir of B. melitensis [4]. The prevention and control of B. melitensis in sheep and goats can be the best fitted model to control human brucellosis. For the purpose it is important to understand the patho-physiological interface involved in the course of disease in sheep or goats as virulence of Brucella species varies according to species, strain and the number of brucellae in inoculums [5,6]. Moreover, being intra cellular parasite, the pathogenic potential of Brucella spp. is highly dependent on its ability to enter and survive within host cells particularly polymorphonuclear cells and macrophages [7]. Further for the survival of Brucella spp. in the harsh environmental stress encountered in route of entry to their replicative niche, include interactive reactive oxygen species, acidic pH, and nutrient deprivation as a key determinant of Brucella virulence [8,9]. The capacity of Brucella to induce disease is dependent on their ability to overcome host cellular response and to replicate within both host phagocytes [10]. In general the intracellular environment of any phagocytic cells is potentially hostile for microbes and, threat their viability by oxidative (MyeloperoxidaseH2O2halide) or non-oxidative (cationic protein, lysozyme, lactoferritin and proteases [11]. Depending upon the type of adjuvants or immunomodulators used in any vaccine macrophages and dendritic cells are recruited and activated for antigen processing to generate free reactive radicals resulting in inflammatory sequelae [12]. Superoxide dismutase (SOD), Catalase, and glutathione peroxidase are integral part of intracellular defense systems and antioxidant mechanism [13]. Cytotoxic effects of oxidants involve DNA damage, protein oxidation, lipid peroxidation with inhibition of cellular metabolic pathways [12]. The establishment of Brucella infection has been correlated with induced oxidative stress and lipid peroxidation in human [8], mice [11]; cattle [14]; rat [15] and in pregnant goats [16]. Thus the aim of the present study was to assess erythrocyte redox parameters viz., lipid peroxidation, Glutathion (GSH) formation and activity of catalase, SOD and Glutathion-STransferase (GST) in clinically healthy goats during Rev.1 vaccination and challenge.
布鲁氏菌病是一种在世界范围内再次出现的人畜共患疾病,该疾病在人类中的发生在很大程度上取决于动物宿主[1]。人类主要由布鲁氏菌引起。人类感染率最高的地区主要是绵羊和山羊布鲁氏菌病发病率高的地区[2,3],因为绵羊和山羊是山羊布鲁氏菌的主要宿主[4]。绵羊和山羊的梅利特白杆菌的预防和控制可以作为控制人类布鲁氏菌病的最佳模型。为此,了解绵羊或山羊疾病过程中涉及的病理生理界面是很重要的,因为布鲁氏菌的毒力根据接种的布鲁氏菌的种类、菌株和数量而变化[5,6]。此外,作为细胞内寄生虫,布鲁氏菌的致病潜力高度依赖于其进入宿主细胞,特别是多形核细胞和巨噬细胞内存活的能力[7]。此外,布鲁氏菌在进入其繁殖生态位的过程中遇到的恶劣环境胁迫下的生存,包括相互作用的活性氧、酸性pH和营养剥夺,这是布鲁氏菌毒力的关键决定因素[8,9]。布鲁氏菌诱导疾病的能力取决于其克服宿主细胞反应和在宿主吞噬细胞内复制的能力[10]。一般来说,任何吞噬细胞的细胞内环境对微生物都是潜在的敌对环境,并通过氧化(髓过氧化物酶eh2o2卤化物)或非氧化(阳离子蛋白、溶菌酶、乳铁蛋白和蛋白酶)威胁微生物的生存能力[11]。根据任何疫苗中使用的佐剂或免疫调节剂的类型,巨噬细胞和树突状细胞被招募和激活,进行抗原加工,产生游离活性自由基,导致炎症后遗症[12]。超氧化物歧化酶(SOD)、过氧化氢酶和谷胱甘肽过氧化物酶是细胞内防御系统和抗氧化机制的重要组成部分[13]。氧化剂的细胞毒性作用包括DNA损伤、蛋白质氧化、脂质过氧化以及细胞代谢途径的抑制[12]。在人[8]、小鼠[11]中,布鲁氏菌感染的建立与诱导的氧化应激和脂质过氧化有关;牛[14];大鼠[15]和怀孕山羊[16]。因此,本研究的目的是评估临床健康山羊在Rev.1疫苗接种和攻击期间红细胞氧化还原参数,即脂质过氧化,谷胱甘肽(GSH)形成以及过氧化氢酶,SOD和谷胱甘肽转移酶(GST)的活性。
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引用次数: 7
Pneumococcal Vaccine Guidance and Alcoholism in North East England:The Case for a Regional Rethink? 英格兰东北部肺炎球菌疫苗指导和酒精中毒:区域性反思的案例?
Pub Date : 2017-12-02 DOI: 10.4172/2157-7560.1000377
J. Mooney, Michael Imarhiagbe, J. Ling
Alcohol misuse is the most important risk factor in adults of working age (<65) for invasive pneumococcal disease (IPD), a serious and often life-threatening infection, both in terms of incidence and mortality
酒精滥用是工作年龄(65岁以下)成人侵袭性肺炎球菌病(IPD)最重要的危险因素,IPD是一种严重且常常危及生命的感染,无论是在发病率还是死亡率方面
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引用次数: 0
Evaluation of Mucosal Vaccines against Pneumococcal and Meningococcal Diseases 肺炎球菌和脑膜炎球菌病粘膜疫苗的评价
Pub Date : 2017-11-22 DOI: 10.15406/IJVV.2017.04.00091
Ana Maria Pereira dos Santos, I. Pereira, M. Miguez, A. Argondizzo, M. Rocha-Leão
Pneumonia is an infection that affects respiratory tract and lungs and it ́s globally the largest infectious cause of death with 920,136 deaths in 2015 for children under five years old, representing 15% of all obits in this age. The main infectious agent of pneumonia, the bacterium Streptococcus pneumoniae, is normally found at nose or throat and can spread by droplets from a cough or sneeze [1]. S. pneumoniae is capable to cause serious severe invasive disease, but it can colonize individuals that will not to present symptoms, suggesting that colonization represents the primary selective force for this bacterium [2]. In the same way, meningococcal meningitis is a bacterial lifethreatening disease caused mainly by Neisseria meningitidis. In Europe, the US and other developed countries, meningococcal disease incidence is typically between 1 and 10 per 100,000 population, with occasional ‘hyper endemic’ periods of persistent disease caused by particular strains [3]. A strip of land of SubSaharan Africa, extending from Senegal to Ethiopia is referred as the “African Meningitis Belt”, represents 430 million people at risk in 26 African countries, with recurring epidemics causing 20,000 to 200,000 cases and 2,000 to 20,000 deaths annually [4]. As transmission of these diseases occurs mainly by respiratory tract, including from asymptomatic individuals carriers, mucosal immunization mechanisms must be constantly evaluated.
肺炎是一种影响呼吸道和肺部的感染,是全球最大的传染性死亡原因,2015年有920,136名5岁以下儿童死亡,占该年龄儿童死亡总数的15%。肺炎的主要传染因子是肺炎链球菌,通常存在于鼻子或喉咙,可通过咳嗽或打喷嚏的飞沫传播[1]。肺炎链球菌能够引起严重的侵袭性疾病,但它可以定殖不出现症状的个体,这表明定殖是该细菌的主要选择力[2]。同样,脑膜炎球菌性脑膜炎是一种主要由脑膜炎奈瑟菌引起的细菌性威胁生命的疾病。在欧洲、美国和其他发达国家,脑膜炎球菌病的发病率通常在每10万人中1至10人之间,偶尔会出现由特定菌株引起的持续疾病的“高流行”期[3]。撒哈拉以南非洲从塞内加尔延伸到埃塞俄比亚的狭长地带被称为“非洲脑膜炎带”,在26个非洲国家中有4.3亿人处于危险之中,每年反复发生的疫情造成2万至20万例病例和2万至2万例死亡[4]。由于这些疾病主要通过呼吸道传播,包括无症状个体携带者,因此必须不断评估粘膜免疫机制。
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Journal of Vaccines and Vaccination
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