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Isolation and Molecular Detection of Pathogenic Vibrio Species among Economic Fish from Red Sea in Egypt 埃及红海经济鱼类致病性弧菌的分离与分子检测
Pub Date : 2016-02-05 DOI: 10.9734/BMRJ/2016/24016
M. Abdel-Azeem, Ahmed Attaya, M. El‐Barbary, S. Sultan
A total of 105 samples were collected from Siganus rivulatus, Mulloidichthys vanicolensis, and Lethrinus lentjan, freshly captured from the Red Sea along Hurghada City coastline zone, Egypt. Clinical and post mortem findings revealed the presence of characteristic clinical signs and lesions similar to those reported in vibriosis. Out of 43 putative Vibrio species isolates obtained by culturing; 30 isolates were presumptively discriminated into Vibrio cholera (n=11), Vibrio anguillarum (n=8), Vibrio fluvialis/ Vibrio furnissii (n=4), Vibrio harveyi (Vibrio carchariae) (n=4) and Vibrio alginolyticus (n=3), but it was not initially possible to approve or repudiate that the remaining 13 isolates were Vibrio species through phenotypic characterization. By using PCR, targeting Original Research Article Abdel-Azeem et al.; BMRJ, 12(6): 1-8, 2016; Article no.BMRJ.24016 2 Vibrio-specific 16S rRNA gene, the presumptive 30 Vibrio isolates and 9 out of the remaining 13 isolates were confirmed as Vibrio species. The prevalence of Vibrio species was 37.1% among the examined fish species; 47.1%, 34.3% and 30.6% in Mulloidichthys vanicolensis, Lethrinus lentjan and Siganus rivulatus, respectively. The occurrence of Vibrio species pathogenic for aquatic animals and humans was confirmed which possess public health concerns. Also, the utility of molecular technique to improve the identification of phenotypic Vibrio like species is recommended.
在埃及赫尔格达市海岸线附近的红海海域,从新近捕获的细鼻鱼、vanicolmulloidichthys和Lethrinus lentjan共采集了105个样本。临床和尸检结果显示,存在与弧菌病相似的特征性临床体征和病变。在通过培养获得的43种推定弧菌分离株中;30株分离株被推定为霍乱弧菌(n=11)、鳗弧菌(n=8)、流感弧菌/富氏弧菌(n=4)、哈维弧菌(炭化弧菌)(n=4)和溶藻弧菌(n=3),但通过表型鉴定初步无法确定或否定其余13株分离株为弧菌。利用PCR方法,针对原始研究文章Abdel-Azeem等;中国生物医学工程学报,12(6):1-8,2016;文章no.BMRJ。24016 2个Vibrio-specific 16S rRNA基因,推定的30株Vibrio分离株和其余13株分离株中的9株被确认为Vibrio种。弧菌的检出率为37.1%;vanicolmulloidichthys、Lethrinus lentjan和Siganus rivulatus分别为47.1%、34.3%和30.6%。已确认发生水生动物和人类致病性弧菌,具有公共卫生问题。此外,建议利用分子技术来提高表型样弧菌的鉴定。
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引用次数: 4
Tolerance to Heavy Metals by Some Fungal Isolates from Petroleum Refinery Effluent in Kaduna, Nigeria 尼日利亚卡杜纳炼油厂废水中某些真菌对重金属的耐受性
Pub Date : 2016-01-10 DOI: 10.9734/bmrj/2016/22728
O. Bello, I. Abdullahi
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引用次数: 4
Microbiological Quality of Laboratories Works Stations: Impact of a System of Saturated Dry Spray Steam 实验室工作站微生物质量:饱和干喷蒸汽系统的影响
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/20228
H. Ahouandjnou, F. Baba-Moussa, V. Dougnon, J. Bonou, Z. Adéoti, F. Toukourou, L. Baba-Moussa
Hygiene and sanitation in laboratories are some important focus for the well-being of scientists and workers. Due to the lack of these notions, a new sanitation system named Polti Sani System has been tested to overcome the limitations of traditional methods. Original Research Article
实验室的卫生和环境卫生是科学家和工作人员福祉的一个重要焦点。由于缺乏这些概念,一种名为Polti Sani system的新卫生系统已经进行了测试,以克服传统方法的局限性。原创研究文章
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引用次数: 0
Species Distribution and Drug Susceptibility of Candida Isolates from Various Clinical Specimens at a Tertiary Care Hospital in Kashmir 克什米尔某三级医院不同临床标本中念珠菌分离株的种类分布和药物敏感性
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/24548
A. Nazir, Farhath Kanth, Anjum Farhana
Aims: The aim of our study was to identify the distribution of Candida species among clinical isolates and their sensitivity pattern for common antifungal drugs. Study Design: Prospective observational study.
目的:研究念珠菌在临床分离株中的分布及其对常用抗真菌药物的敏感性。研究设计:前瞻性观察性研究。
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引用次数: 0
Comparative Analysis of Molecular Methods for Detection of Influenza Viruses 流感病毒分子检测方法的比较分析
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/28858
Vikrant Sharma, S. Kaushik
Aims: Influenza is a serious threat to human population worldwide therefore continuous surveillance is required to update influenza seasonal vaccines. A rapid, sensitive, specific and cost effective diagnostic method will be much helpful for patient management in the present scenario. Present study is conceptualized for detection of influenza viruses by molecular methods and compare with ‘gold standard’ virus isolation. Study Design: Standard strains of Influenza virus were used to standardize the molecular diagnostic assays and results were then compared with virus isolation. Place and Duration of Study: Centre for Biotechnology, Maharshi Dayanand University, Rohtak, Haryana, India, between December 2015 and April 2016. Methodology: Standard strains of Influenza A and B virus were used for influenza virus isolation using virus culturing in MDCK (Madin-Darby Canine Kidney) cell line by following standard tissue culture procedure. Isolated viruses were detected by Hemagglutination assay (HA) and typed by Hemagglutination inhibition assay (HI). Conventional one step RT-PCR, Taqman real time RT-PCR and RT-LAMP (Reverse transcription loop mediated isothermal amplification) were standardized on RNA extracted from standard strains. Sensitivity and specificity of these molecular methods were Original Research Article Sharma and Kaushik; BMRJ, 17(3): 1-10, 2016; Article no.BMRJ.28858 2 compared with each other as well as with virus culture (gold standard). Results: Both influenza A and B virus strains were cultured in MDCK cells and produced cytopathic effect during virus culture. Conventional RT-PCR and real time RT-PCR detected both type of Influenza viruses. RT-LAMP also successfully detected and typed influenza viruses. RTLAMP proved to be more rapid than other two molecular assays. Conclusion: Molecular diagnostic methods are useful in detection and typing of Influenza viruses and these methods provide results in short period of time when compared with traditional virus culture methods. RT-LAMP is rapid, sensitive, specific and cost effective method for influenza virus detection and subtyping.
目的:流感是对全世界人口的严重威胁,因此需要持续监测以更新流感季节性疫苗。在这种情况下,一种快速、灵敏、特异和经济有效的诊断方法将对患者管理有很大帮助。本研究的概念是用分子方法检测流感病毒,并与“金标准”病毒分离进行比较。研究设计:采用流感病毒标准株进行标准化分子诊断分析,并将结果与病毒分离进行比较。学习地点和时间:2015年12月至2016年4月,印度哈里亚纳邦罗塔克Maharshi Dayanand大学生物技术中心。方法:采用标准的组织培养程序,在MDCK (Madin-Darby犬肾)细胞株上进行病毒培养,分离甲型流感病毒和乙型流感病毒标准株。分离病毒采用血凝试验(HA)检测,血凝抑制试验(HI)分型。对标准菌株提取的RNA进行常规一步RT-PCR、Taqman实时RT-PCR和RT-LAMP(逆转录环介导等温扩增)标准化。这些分子方法的敏感性和特异性分别为Sharma和Kaushik;中国生物医学工程学报,17(3):1-10,2016;文章no.BMRJ。28858 2相互比较,并与病毒培养(金标准)。结果:甲型和乙型流感病毒株均能在MDCK细胞中培养,并在培养过程中产生细胞病变效应。常规RT-PCR和实时RT-PCR检测两种流感病毒。RT-LAMP还成功地检测和分型流感病毒。RTLAMP比其他两种分子检测方法更快。结论:分子诊断方法可用于流感病毒的检测和分型,与传统的病毒培养方法相比可在短时间内获得结果。RT-LAMP是一种快速、灵敏、特异、经济有效的流感病毒检测和分型方法。
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引用次数: 7
Evolution Profile of Escherichia coli Resistance from January 2009 – April 2013 to Antibiotics at the Yaounde University Teaching Hospital, Cameroon 喀麦隆雅温得大学教学医院2009年1月至2013年4月大肠杆菌对抗生素耐药性演变概况
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/29416
Estelle Longla, Emilia Lyonga-Mbamyah, C. Kalla, W. Baiye, A. Chafa, H. Gonsu
Many strains of Escherichia coli ( E. coli ) have been proven to be pathogenic and are sometimes responsible for deadly outbreaks. This bacterium has become more resistant to antibiotics to which it is often sensitive. The aim of this study was to study the evolution of E. coli resistance to antibiotics from 2009 to 2013 at the Yaoundé University Teaching Hospital. We included archived bench files containing information on patient’s demographic data and results of antimicrobial susceptibility testing. The data were analyzed using Microsoft office, Excel 2007 software and SPSS. A total of 350 strains of E. coli were collected from both hospitalized and non-hospitalized patients. The antimicrobial susceptibility was tested using 23 antibiotics from January 2009 to April 2013 at the Bacteriology Unit of the Yaounde University Teaching Hospital. We observed a decrease in the trend of the resistance to 8 of the antibiotics tested: Amoxicillin + clavulanic acid, cefuroxime, cefoxitin, imipenem, ofloxacine, colistin, gentamicin and netilmicin. Meanwhile, we noticed an increase in the trend of resistance to 15 antibiotics: Amoxicillin, cephalothin, cefoxitin, cefotaxime, ceftazidime, cefixime, cefepime, aztreonam, amikacin, nalidixic acid, norfloxacin, ciprofloxacin, trimethoprim-sulfamethoxazole, nitrofurantoin, chloramphenicol, fosfomycin). The trend observed were statistically significant, for the resistance rate to amoxicillin + clavulanic acid (P value=0.002), also to resistance rates of amikacin and cefotaxime (P-values=0.008 and 0.014 respectively). This increase in resistance over the years to most of the commonly used antibiotics has caused E. coli to be classified among multidrug resistant bacteria. In order to avoid a therapeutic impasse, it is necessary to carry out sensitization against the abusive use of antibiotics; surveillance activities for multidrug resistant bacteria and nosocomial infections should be reinforced as E. coli is one of a most common nosocomial bacteria.
许多大肠杆菌菌株已被证明具有致病性,有时会导致致命的暴发。这种细菌对通常敏感的抗生素产生了更强的耐药性。本研究的目的是研究2009 - 2013年雅温顿大学教学医院大肠杆菌对抗生素的耐药性演变。我们纳入了包含患者人口统计数据和抗菌药物敏感性测试结果信息的存档台架文件。采用Microsoft office、Excel 2007、SPSS软件对数据进行分析。从住院和非住院患者中共收集到350株大肠杆菌。2009年1月至2013年4月,在雅温得大学教学医院细菌学部门使用23种抗生素对抗菌素敏感性进行了测试。我们观察到对阿莫西林+克拉维酸、头孢呋辛、头孢西丁、亚胺培南、氧氟沙星、粘菌素、庆大霉素和奈替米星8种抗生素的耐药性呈下降趋势。同时,我们注意到阿莫西林、头孢菌素、头孢西丁、头孢噻肟、头孢噻啶、头孢肟、头孢吡肟、氨曲南、阿米卡星、萘啶酸、诺氟沙星、环丙沙星、甲氧苄啶-磺胺甲恶唑、呋喃妥因硝基、氯霉素、磷霉素等15种抗生素的耐药性呈上升趋势。对阿莫西林+克拉维酸的耐药率(P值=0.002),对阿米卡星和头孢噻肟的耐药率(P值分别为0.008和0.014)均有统计学意义。多年来,大肠杆菌对大多数常用抗生素的耐药性增加,导致大肠杆菌被归类为多重耐药细菌。为了避免治疗僵局,有必要对滥用抗生素进行增敏;由于大肠杆菌是最常见的医院感染细菌之一,应加强对多重耐药细菌和医院感染的监测活动。
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引用次数: 2
Identification, Comparison, and Transfer of the pxo Gene between Members of Bacilli Species 芽孢杆菌属成员间pxo基因的鉴定、比较和转移
Pub Date : 2016-01-10 DOI: 10.9734/bmrj/2016/19130
S. Hossein, N. Javad, Nouruzi Jamileh, Lotfi Marzieh, Hojatoallah Moradi, R. Golmohammadi
Aim: Bacillus anthracis causes anthrax in which the pxo gene and its associated plasmids, pXOP1and pXO2, encode toxin and capsule proteins, both of which are involved in the pathogenicity of anthrax. The possibility of transferring the pxo gene to other bacilli has recently been shown. The main aims of this study were to identify and compare the frequencies of the pxo gene in isolated bacilli members. The study examined possible pxo gene transfer from B. anthracis to other closely related members of the genus Bacillus. The findings presented here may be useful in the study of vaccination. Study Design: The study design was cross-sectional and descriptive. Sixty-five soil samples were collected from different geographical regions in Iran. Place and Duration of Study: The study was conducted in many provinces in Iran over several months. Samples were analyzed at the Mashhad University of Medical Sciences. Methodology: Organisms were isolated from the soil, and the isolation of pXO plasmid was performed. Presence of the pXO1 plasmid was confirmed by agarose gel electrophoresis. Isolated proteins from each bacillus were examined by SDS-PAGE. The limits of proteins encoded by the pxo gene were specifically located and data were statistically analyzed using excel. Results: Results showed that 13 samples out of 38 bacilli contained the plasmid of interest and protein bands related to proteins coded by the pxo gene. Conclusion: We have determined that the pXO1 plasmid has been transferred from B. anthracis to 13 other isolates of B. cereus group members in different regions in Iran. No transfer of the pXO2 plasmid was observed. This was apart from the identification of the pxo gene and its plasmids in different members of bacilli.
目的:炭疽芽孢杆菌引起炭疽,其中pxo基因及其相关质粒pxop1和pXO2编码毒素蛋白和荚膜蛋白,两者均参与炭疽的致病性。最近已经证明将pxo基因转移到其他杆菌的可能性。本研究的主要目的是鉴定和比较分离杆菌成员中pxo基因的频率。该研究检查了可能的pxo基因从炭疽杆菌转移到其他密切相关的芽孢杆菌属成员。这里提出的发现可能对疫苗接种的研究有用。研究设计:研究设计是横断面和描述性的。从伊朗不同的地理区域收集了65个土壤样本。研究地点和时间:该研究在伊朗的许多省份进行了几个月。样本在马什哈德医学大学进行了分析。方法:从土壤中分离微生物,分离pXO质粒。琼脂糖凝胶电泳证实了pXO1质粒的存在。用SDS-PAGE对各芽孢杆菌分离的蛋白进行检测。对pxo基因编码的蛋白进行了特异性定位,并用excel对数据进行了统计分析。结果:38株杆菌中有13株含有pxo基因编码蛋白相关的蛋白带和目的质粒。结论:pXO1质粒已从炭疽芽孢杆菌转移到伊朗不同地区的其他13株蜡样芽孢杆菌群成员中。未观察到pXO2质粒的转移。这还不包括在杆菌的不同成员中鉴定出pxo基因及其质粒。
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引用次数: 0
The Antibacterial Effect of Carica papaya L. Extracts and Their Synergistic Effect with Antibiotic and Non-antibiotic Drugs 木瓜果实提取物的抑菌作用及其与抗生素和非抗生素药物的协同作用
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/28042
E. Francis, V. Jose
Aims: Antibacterial activity of Carica papaya leaf and seed extracts, their synergism with antibiotic and non-antibiotic drugs and GC-MS analysis of extracts. Study Design: Antibacterial activity was evaluated by Disc and Well diffusion method. Synergism with antibiotic drug, Gentamicin, and non-antibiotic drug, Vitamin C, were done by disc diffusion method. GC-MS analysis carried out in GC-MS equipment (Thermo Scientific Co.). Place and Duration of Study: Study was conducted in Department of Botany and Department of Chemistry, St. Thomas’ College, Thrissur between December 2015 to April 2016. Methodology: We include 3 gram negative (E. coli, Klebsiella pneumoniae and Pseudomonas aeruginosa) and a gram positive (Staphylococcus aureus) bacteria in this study. Antibacterial activity of Carica papaya extracts (water, petroleum benzene, chloroform and ethanol extracts) against these bacteria’s were studied. Their synergisms with antibiotic as well as non antibiotic drugs were also evaluated. GC-MS analysis of all the extracts were also done. Results: In the antibacterial activity assessment, all the four extracts of tender leaves were effective Original Research Article Francis and Jose; BMRJ, 16(4): 1-11, 2016; Article no.BMRJ.28042 2 against E. coli than other plant materials. Seed extracts were more effective against P. aeruginosa and S. aureus. In synergistic analysis, water and ethanol extracts of all the plant materials have an enhanced effect with gentamicin against E. coli and P. aeruginosa. Yellow leaves extracts along with gentamicin exhibited an inhibition zone which is greater than that of gentamicin alone. Vitamin C gave enhanced activity against all the tested bacteria when combined with papaya extracts. GCMS analysis proved that more number of bioactive components were present in petroleum benzene extract of tender leaves than all other extracts. Conclusion: The results shows that Carica papaya extracts have antibacterial activity and when they were combined with antibiotic and non antibiotic drugs. In GC-MS analysis, tender leaves exhibited more bioactive components.
目的:研究番木瓜叶和种子提取物的抑菌活性、与抗生素和非抗生素药物的协同作用及提取物的GC-MS分析。研究设计:采用Disc法和Well扩散法测定抗菌活性。采用圆盘扩散法与抗生素药物庆大霉素和非抗生素药物维生素C进行协同作用。GC-MS分析在GC-MS设备上进行(Thermo Scientific Co.)。研究地点和时间:研究于2015年12月至2016年4月在Thrissur圣托马斯学院植物系和化学系进行。方法:我们在本研究中纳入了3种革兰氏阴性(大肠杆菌、肺炎克雷伯菌和铜绿假单胞菌)和1种革兰氏阳性(金黄色葡萄球菌)细菌。研究了番木瓜提取物(水、石油苯、氯仿和乙醇提取物)对这些细菌的抑菌活性。并对其与抗生素及非抗生素药物的协同作用进行了评价。对各提取物进行气相色谱-质谱分析。结果:在抗菌活性评价中,四种嫩叶提取物均有效;中国生物医学工程学报,16(4):1-11,2016;文章no.BMRJ。28042对大肠杆菌的抗性较其他植物材料强。种子提取物对铜绿假单胞菌和金黄色葡萄球菌的抑菌效果较好。在协同分析中,所有植物材料的水提取物和乙醇提取物与庆大霉素对大肠杆菌和铜绿假单胞菌的作用增强。黄叶提取物与庆大霉素联用时,其抑菌带大于单用庆大霉素。当维生素C与木瓜提取物结合使用时,对所有测试细菌的活性都增强了。GCMS分析表明,嫩叶石油苯提取物中含有较多的生物活性成分。结论:木瓜果壳提取物在与抗生素及非抗生素药物联合使用时均具有抗菌活性。在GC-MS分析中,嫩叶表现出更多的生物活性成分。
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引用次数: 4
Genotyping Human Papillomavirus in Women Attending Cervical Cancer Screening Clinic in Harare, Zimbabwe 在津巴布韦哈拉雷参加子宫颈癌筛查诊所的妇女的人类乳头瘤病毒基因分型
Pub Date : 2016-01-10 DOI: 10.9734/BMRJ/2016/28481
Takudzwa Matuvhunye, Racheal Dube-Mandishora, N. Chin’ombe, G. Chakafana, J. Mbanga, E. Zumbika, B. Stray-Pedersen
Aim: To determine the prevalence of human papillomavirus genotypes in women attending a cervical cancer screening VIAC (visual inspection with acetic acid) clinic. Study Design: Cross-sectional study. Place and Duration of Study: VIAC clinic at Parirenyatwa Referral Hospital in Harare in Zimbabwe between February and April 2015. Methodology: Sexually active women were recruited and they provided their socio-demographic data and self-collected vaginal swabs. HIV status of the participants was determined. DNA was Original Research Article Matuvhunye et al.; BMRJ, 16(6): 1-9, 2016; Article no.BMRJ.28481 2 extracted from the swabs using the standard phenol-chloroform method. HPV DNA was detected using the standard consensus MY09/11-GP5+/GP6+ nested polymerase chain reaction. Amplicons were sequenced and sequences analyzed using bioinformatics tools to identify the HPV genotypes. Results: Sixty women were recruited. Their age ranged from 21-83 years, with a mean of 40.1 years. Most of the women were married and resided in the urban areas. Of the 60 participants, 50% (30/60) were HIV-positive. The prevalence of HPV genotypes in the study subjects was 56.7% (34/60). HPVs were most prevalent in women aged 30 years and below, and became less prevalent as the age increased. The predominant genotypes detected were HPV-16, -58, -52, -45, 18, -33, -51, -6, -81, -11, -70, -62, -32 and -40. Conclusion: A number of HPV genotypes were detected in half of women tested. There was no significance association between risk-factors (parity, level of education, residence, history of STI, contraceptive use and sexual debut) and HPV infection. The findings of this study showed that consensus nested PCR and DNA sequencing could be used to detect HPV genotypes in women in cervical cancer screening programs. Although this method is sensitive, it is inefficient at detecting multiple HPV infections.
目的:了解人乳头瘤病毒基因型在参加宫颈癌筛查VIAC(醋酸目视检查)门诊妇女中的流行情况。研究设计:横断面研究。研究地点和时间:2015年2月至4月,在津巴布韦哈拉雷Parirenyatwa转诊医院VIAC诊所。方法:招募性活跃的妇女,并提供她们的社会人口统计数据和自行收集的阴道拭子。确定参与者的艾滋病毒状况。DNA为原创研究文章Matuvhunye et al;中国生物医学工程学报,16(6):1-9,2016;文章no.BMRJ。28481 2用标准酚-氯仿法从拭子中提取。采用标准共识MY09/11-GP5+/GP6+巢式聚合酶链反应检测HPV DNA。扩增子测序和序列分析使用生物信息学工具,以确定HPV基因型。结果:招募了60名女性。年龄21 ~ 83岁,平均40.1岁。大多数妇女已婚,居住在城市地区。在60名参与者中,50%(30/60)是hiv阳性。研究对象中HPV基因型患病率为56.7%(34/60)。hpv在30岁及以下的女性中最流行,随着年龄的增长而变得不那么流行。检测到的主要基因型为HPV-16、-58、-52、-45、18、-33、-51、-6、-81、-11、-70、-62、-32和-40。结论:半数女性检测到多种HPV基因型。危险因素(胎次、教育水平、居住地、性传播感染史、使用避孕药具和初次性行为)与HPV感染之间无显著相关性。本研究结果表明,巢式PCR和DNA测序可用于检测宫颈癌筛查项目中妇女的HPV基因型。虽然这种方法是敏感的,但它在检测多种HPV感染方面效率低下。
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引用次数: 3
Studying the Immune Profile and Susceptibility to Microbial Infections in Obese Adults 研究肥胖成人的免疫特征和对微生物感染的敏感性
Pub Date : 2016-01-10 DOI: 10.9734/bmrj/2016/23752
Mohammad A. K. Al-Saadi, H. Farhood, F. Al-Zayadi
Objectives: This study aims at studying the effect of adult obesity on immunologic profile and IFN- γ was not significant decreased in obese group, while concentrations of C3 & C4 were a highly significant increased (p ˂ 0.001) in obese group, phagocytic index was a highly significant decreased in obese subjects (p ˂ 0.001). Regarding the susceptibility to microbial infections the concentrations of ASO & anti-measles virus IgG in obese group were a highly significant more than controls. Conclusions: This result may provide clear evidence that obese subjects are more susceptible to microbial infections than normal subjects.
目的:本研究旨在研究成人肥胖对免疫特性的影响,肥胖组IFN- γ无显著降低,而肥胖组C3和C4浓度显著升高(p小于0.001),肥胖组吞噬指数显著降低(p小于0.001)。在对微生物感染的敏感性方面,肥胖组ASO和抗麻疹病毒IgG浓度显著高于对照组。结论:本研究结果为肥胖者比正常人更易发生微生物感染提供了明确的证据。
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引用次数: 0
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British microbiology research journal
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