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Antibacterial and Antioxidant Efficacies of Secondary Metabolites from the Roots of Cyphostemma adenocaule: A Combined In Vitro and In Silico Study Cyphostemma adenocaule 根部次生代谢物的抗菌和抗氧化功效:体外和硅学联合研究
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-03-06 DOI: 10.1155/2024/1679695
Hadush Gebrehiwot, Yadessa Melaku, Muhdin Aliye, Urgessa Ensermu, Aman Dekebo, Milkyas Endale, Daniel Rentsch, Mo Hunsen
Cyphostemma adenocaule is a therapeutic plant traditionally used to treat rabies, snake bite, diarrhea, and wound healing. To address the bioactive compounds exhibiting these activities, we performed a comprehensive study on the roots of the plant. Thus, the present study aims to inspect the in vitro antioxidant and antibacterial efficacies of compounds isolated from the combined dichloromethane : methanol (1 : 1) and methanol extracts of C. adenocaule along with the in silico study of their interaction with selected protein targets. The silica gel column chromatography technique was used for the isolation of compounds, and the antibacterial and antioxidant activities were evaluated using agar disc diffusion and DPPH radical scavenging assays, respectively. Furthermore, in silico molecular docking screening, pharmacokinetics, and toxicity protocols of the compound isolates were performed to offer the potential applications of the compounds in developing novel medications. A BIOVIA Discovery Studio in combination with AutoDock Vina 4.2 software, SwissADME, and ProTox-II prediction web tools were used to generate the molecular docking, pharmacokinetics, and toxicity profiles, respectively. Notably, the chromatographic separation of the combined extracts yielded six known compounds, namely, β-sitosterol (1), 3-hydroxyisoagatholactone (2), ε-viniferin (3), myricetin (4), tricuspidatol A (5), and parthenocissin A (6). The in vitro antibacterial activities revealed the highest inhibition zone by tricuspidatol A (5) (16.67 ± 0.47), showcasing its potent activity against S. aureus at 2 mg/mL, compared to ciprofloxacin (21.50 ± 0.41). ε-Viniferin (3) (IC50: 0.32 μg/mL) exhibited greater antioxidant activity than the others and displayed promising results compared to ascorbic acid (0.075 μg/mL). The molecular docking study revealed the highest binding affinity by ε-viniferin (3) (−9.9 kcal/mol) against topoisomerase II α. 3-Hydroxyisoagatholactone (2) and ε-viniferin (3) fulfilled Lipinski’s rule with no violation, and the organ toxicity predictions revealed that all the compounds showed no cytotoxicity and hepatotoxicity effects. Thus, this study’s combined in vitro and in silico outcomes suggest the potential use of the isolated compounds in drug discovery and support the traditional relevance of C. adenocaule.
Cyphostemma adenocaule 是一种治疗植物,传统上用于治疗狂犬病、蛇咬伤、腹泻和伤口愈合。为了研究具有这些活性的生物活性化合物,我们对该植物的根部进行了全面研究。因此,本研究旨在检测从 C. adenocaule 的二氯甲烷:甲醇(1:1)和甲醇联合提取物中分离出来的化合物的体外抗氧化和抗菌功效,以及它们与选定蛋白质靶标相互作用的硅学研究。采用硅胶柱层析技术分离化合物,并分别使用琼脂盘扩散法和 DPPH 自由基清除法评估其抗菌和抗氧化活性。此外,还对分离出的化合物进行了分子对接筛选、药代动力学和毒性分析,以提供这些化合物在开发新型药物方面的潜在应用。BIOVIA Discovery Studio结合AutoDock Vina 4.2软件、SwissADME和ProTox-II预测网络工具分别生成了分子对接、药代动力学和毒性图谱。值得注意的是,在对组合提取物进行色谱分离时,得到了六个已知化合物,即β-谷甾醇(1)、3-羟基异泽泻内酯(2)、ε-维尼芬素(3)、三尖杉酯素(4)、三尖杉醇 A(5)和半知母苷 A(6)。体外抗菌活性显示,与环丙沙星(21.50 ± 0.41)相比,三尖杉酯醇 A(5)的抑菌区最大(16.67 ± 0.47),表明其在 2 毫克/毫升浓度下对金黄色葡萄球菌具有强效活性。ε-Viniferin (3) (IC50:0.32 μg/mL)的抗氧化活性高于其他化合物,与抗坏血酸(0.075 μg/mL)相比,显示出良好的效果。分子对接研究表明,ε-葡萄素(3)与拓扑异构酶 II α的结合亲和力最高(-9.9 kcal/mol)。因此,本研究的体外和硅学综合结果表明,分离出的化合物有可能被用于药物研发,并支持了C. adenocaule的传统相关性。
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引用次数: 0
The Malaria Burden: A South African Perspective 疟疾负担:南非视角
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-02-23 DOI: 10.1155/2024/6619010
Marissa Balmith, Charlise Basson, Sarel J. Brand
Malaria is a deadly disease caused by protozoan pathogens of the Plasmodium parasite. Transmission to humans occurs through the bite of an infected female Anopheles mosquito. According to the World Health Organization (WHO), an estimated 247 million cases of malaria were recorded worldwide in 2021, with approximately 619 000 malaria deaths. The initial signs of malaria can be mild and challenging to diagnose due to the signs and symptoms being similar to those of other illnesses. The malaria burden remains largely concentrated in the WHO sub-Saharan African region and has been recognised as a significant contributor to morbidity and mortality. This review aims to contribute to the existing knowledge on malaria in South Africa, a region within sub-Saharan Africa, focusing on the epidemiology and life cycle of the malaria parasite as well as diagnostic approaches for detecting malaria. In addition, nonpharmacological and pharmacological interventions for treating and preventing malaria infections will also be discussed herein. While there has been a significant reduction in the global burden of this disease, malaria remains a public health issue in South Africa. As such, the implementation of effective preventative measures and strategies, early diagnosis, and appropriate treatment regimens are crucial to reducing the malaria burden in South Africa.
疟疾是一种由疟原虫病原体引起的致命疾病。疟疾通过受感染的雌性按蚊叮咬传播给人类。据世界卫生组织(WHO)估计,2021 年全球疟疾病例约为 2.47 亿例,约有 619 000 人死于疟疾。疟疾的初期症状可能比较轻微,而且由于症状和体征与其他疾病相似,因此很难诊断。疟疾负担仍主要集中在世卫组织撒哈拉以南非洲地区,已被公认为发病率和死亡率的重要因素。本综述旨在为撒哈拉以南非洲地区的南非提供有关疟疾的现有知识,重点关注流行病学、疟原虫的生命周期以及检测疟疾的诊断方法。此外,本文还将讨论治疗和预防疟疾感染的非药物和药物干预措施。虽然这一疾病在全球造成的负担已大大减轻,但疟疾仍然是南非的一个公共卫生问题。因此,实施有效的预防措施和战略、早期诊断和适当的治疗方案对于减轻南非的疟疾负担至关重要。
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引用次数: 0
Systematic Review and Meta-Analysis of Congenital Toxoplasmosis Diagnosis: Advances and Challenges 先天性弓形虫病诊断的系统回顾和元分析:进展与挑战
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-02-21 DOI: 10.1155/2024/1514178
Priscila Silva Franco, Ana Carolina Morais Oliveira Scussel, Rafaela José Silva, Thadia Evelyn Araújo, Henrique Tomaz Gonzaga, Camila Ferreira Marcon, Joaquim Pedro Brito-de-Sousa, Angélica Lemos Debs Diniz, Marina Carvalho Paschoini, Bellisa Freitas Barbosa, Olindo Assis Martins-Filho, José Roberto Mineo, Eloisa Amália Vieira Ferro, Angelica Oliveira Gomes
Objective. To understand how congenital toxoplasmosis (CT) diagnosis has evolved over the years, we performed a systematic review and meta-analysis to summarize the kind of analysis that has been employed for CT diagnosis. Methods. PubMed and Lilacs databases were used in order to access the kind of analysis that has been employed for CT diagnosis in several samples. Our search combined the following combining terms: “congenital toxoplasmosis” or “gestational toxoplasmosis” and “diagnosis” and “blood,” “serum,” “amniotic fluid,” “placenta,” or “colostrum.” We extracted data on true positive, true negative, false positive, and false negative to generate pooled sensitivity, specificity, and diagnostic odds ratio (DOR). Random-effects models using MetaDTA were used for analysis. Results. Sixty-five articles were included in the study aiming for comparisons (75.4%), diagnosis performance (52.3%), diagnosis improvement (32.3%), or to distinguish acute/chronic infection phases (36.9%). Amniotic fluid (AF) and placenta were used in 36.9% and 10.8% of articles, respectively, targeting parasites and/or T. gondii DNA. Blood was used in 86% of articles for enzymatic assays. Colostrum was used in one article to search for antibodies. In meta-analysis, PCR in AF showed the best performance for CT diagnosis based on the highest summary sensitivity (85.1%) and specificity (99.7%) added to lower magnitude heterogeneity. Conclusion. Most of the assays being researched to diagnose CT are basically the same traditional approaches available for clinical purposes. The range in diagnostic performance and the challenges imposed by CT diagnosis indicate the need to better explore pregnancy samples in search of new possibilities for diagnostic tools. Exploring immunological markers and using bioinformatics tools and T. gondii recombinant antigens should address the research needed for a new generation of diagnostic tools to face these challenges.
目的。为了解先天性弓形虫病(CT)诊断多年来的发展情况,我们进行了一项系统回顾和荟萃分析,总结了 CT 诊断所采用的分析方法。方法:PubMed 和 Lilacs我们使用了 PubMed 和 Lilacs 数据库,以获取多个样本中用于 CT 诊断的分析方法。我们的搜索结合了以下组合词:"先天性弓形虫病 "或 "妊娠弓形虫病"、"诊断"、"血液"、"血清"、"羊水"、"胎盘 "或 "初乳"。我们提取了真阳性、真阴性、假阳性和假阴性的数据,以生成集合灵敏度、特异性和诊断几率比(DOR)。使用 MetaDTA 随机效应模型进行分析。结果。研究共纳入 65 篇文章,目的是进行比较(75.4%)、诊断性能(52.3%)、诊断改进(32.3%)或区分急性/慢性感染阶段(36.9%)。分别有 36.9% 和 10.8% 的文章使用羊水和胎盘检测寄生虫和/或淋球菌 DNA。86%的文章使用血液进行酶测定。一篇文章使用牛初乳来寻找抗体。在荟萃分析中,AF 中的 PCR 在 CT 诊断中表现最佳,灵敏度(85.1%)和特异度(99.7%)均最高,异质性较低。结论目前研究的大多数 CT 诊断方法基本上都是用于临床的传统方法。CT 诊断所带来的诊断性能差异和挑战表明,有必要更好地探索妊娠样本,寻找新的诊断工具。探索免疫标记物、使用生物信息学工具和淋病双球菌重组抗原应能解决新一代诊断工具所需的研究,以应对这些挑战。
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引用次数: 0
Unraveling Dengue Dynamics: In-Depth Epidemiological and Entomological Analyses in Bengaluru, India 揭示登革热动态:对印度班加罗尔的流行病学和昆虫学进行深入分析
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-02-10 DOI: 10.1155/2024/7247263
Vani H. C., Sujit Nath N., Jaiswal M. K., Tiwari R. P., Bharathi P., Asmita B., Shankar G., Jithen C., Pallavi V. D., Srinivas V., Ashok M., Mahamood Shariff, Renuka S., Shrinivasa B. M.
In view of the increased number of detected dengue cases in Bengaluru, a request for situation analysis was received from local health authorities in the selected area. The study included epidemiological and entomological assessments to understand the same. The immature forms collected were allowed to emerge, pooled, and processed for vector incrimination. In the surveyed population (347), 20 (5.8%) reported fever cases and 12 (3.5%) were confirmed as dengue cases among the 102 families. Stegomyia indices were high. Vector incrimination studies revealed pools positive for the presence of dengue virus in flower pots, fridge trays, plastic barrels, and rubber tires habitats. This study highlights the increased risk of dengue fever incidence in communities wherepoor intra and peri-domestic sanitation practices are prevailing and recommendsregular entomological surveillance of denguevirus in its vector population..
鉴于班加罗尔发现的登革热病例数量增加,选定地区的地方卫生当局要求进行情况分析。研究包括流行病学和昆虫学评估,以了解相同的情况。收集到的未成熟虫体被允许出现、汇集和处理,以便对病媒进行分类。在被调查的人口(347 人)中,有 20 个(5.8%)报告了发烧病例,在 102 个家庭中,有 12 个(3.5%)被确诊为登革热病例。登革热指数较高。病媒分类研究显示,花盆、冰箱托盘、塑料桶和橡胶轮胎中的登革热病毒呈阳性。这项研究强调,在家庭内部和周边卫生条件差的社区,登革热发病的风险会增加,因此建议定期对登革热病媒进行昆虫学监测。
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引用次数: 0
Breeding Habitat Preference of the Dengue Vector Mosquitoes Aedes aegypti and Aedes albopictus from Urban, Semiurban, and Rural Areas in Kurunegala District, Sri Lanka 斯里兰卡库鲁内加拉地区城市、半城市和农村地区登革热病媒蚊子埃及伊蚊和白纹伊蚊的繁殖生境偏好
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-01-29 DOI: 10.1155/2024/4123543
J. M. Manel K. Herath, W. A. Priyanka P. De Silva, Thilini C. Weeraratne, S. H. P. Parakrama Karunaratne
Elimination of vector mosquito larvae and their breeding environments is an effective strategy in dengue disease control. Present study examined larval density and water quality in breeding habitats and container preference of dengue vectors Ae. aegypti and Ae. albopictus. Larval surveys were conducted monthly in urban, semiurban, and rural sites in Kurunegala, Sri Lanka, from January 2019 to December 2021. Larval densities were recorded under the following three categories: type of container (16 types), type of material (6 types), and location (indoor/outdoor). Breeding preference ratios (BPRs) were calculated using Index of Available Containers and the Index of Contribution to Breeding Sites. Out of 19,234 wet containers examined, larval stages were found in 1,043 habitats. Ae. albopictus larvae were in all three areas whereas Ae. aegypti larvae were restricted to urban areas. Highest number of wet containers and highest positivity were reported from urban followed by semiurban. In general, discarded nondegradable items were the most frequent and mostly positive breeding sites. For Ae. aegypti, the most preferred breeding sites were gutters and concrete slabs. Ae. albopictus mostly preferred concrete slabs in urban areas and tyres in semiurban and rural areas. Material types such as rubber and concrete were mostly preferred by Ae. aegypti whereas ceramic was preferred by Ae. albopictus. Although plastic was the most available material type in all study sites, preference to plastic was low except for urban Ae. albopictus. Both species preferred urban indoor breeding habitats although outdoor breeding was preferred by Ae. albopictus in rural areas. Larval densities of Ae. aegypti and semiurban Ae. albopictus significantly correlated with the BPR of the container type and material type. Dengue vector larvae were found in a 6.7–9.4 pH range. Total dissolved solids and alkalinity positively correlated with preference. Information generated can be successfully used in waste management and public education for effective vector control.
消灭病媒蚊幼虫及其繁殖环境是控制登革热病的有效策略。本研究调查了登革热病媒埃及伊蚊和白纹伊蚊的幼虫密度、繁殖栖息地的水质以及对容器的偏好。从2019年1月至2021年12月,每月在斯里兰卡库鲁内加拉的城市、半城市和农村地区进行幼虫调查。幼虫密度记录分为以下三类:容器类型(16 种)、材料类型(6 种)和地点(室内/室外)。利用可用容器指数和繁殖地贡献指数计算繁殖偏好比率(BPRs)。在检查的 19,234 个湿容器中,在 1,043 个生境中发现了幼虫阶段。白纹伊蚊幼虫出现在所有三个地区,而埃及伊蚊幼虫则局限于城市地区。城市地区的湿容器数量最多,阳性率最高,其次是半城市地区。一般来说,不可降解的废弃物品是最常见的阳性繁殖地。埃及蚁最喜欢的繁殖地是排水沟和水泥板。白纹伊蚊在城市地区最喜欢水泥板,在半城市和农村地区则喜欢轮胎。埃及蚁主要喜欢橡胶和混凝土等材料类型,而白纹伊蚊则喜欢陶瓷。虽然塑料是所有研究地点中最容易获得的材料类型,但除了城市白纹伊蚊外,其他物种对塑料的偏好度都很低。两种白纹伊蚊都喜欢在城市室内繁殖,但农村地区的白纹伊蚊更喜欢在室外繁殖。埃及登革热蚁和半城市白纹伊蚊的幼虫密度与容器类型和材料类型的 BPR 显著相关。登革热病媒幼虫的 pH 值范围为 6.7-9.4。总溶解固体和碱度与偏好呈正相关。所生成的信息可成功用于废物管理和公众教育,以有效控制病媒。
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引用次数: 0
Assessment of Factories on Adherence to COVID-19 Standard Operating Procedures: A Case Study of Wakiso, Mukono, Buikwe, and Jinja Districts, Uganda 评估工厂对 COVID-19 标准操作程序的遵守情况:乌干达 Wakiso、Mukono、Buikwe 和 Jinja 地区的案例研究
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-01-16 DOI: 10.1155/2024/6670510
Joseph M. Kungu, Edity Namyalo, Angella Musewa, Sarah Nitumusiima, Phiona Keije, Catherine Nakakooza, Osborn Oyirwoth
<i>Background</i>. Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Uganda confirmed the first case of COVID-19 on 21st March, 2020, which led to the first total lockdown in the country. During the lockdown, some factories remained operational; hence, there is a need for a study aimed at assessing the level of adherence to COVID-19 standard operating procedures (SOPs) in factories as a mitigator for the pandemic. <i>Methods</i>. A cross-sectional study to assess compliance of factories to COVID-19 SOPs was conducted in Wakiso, Mukono, Buikwe, and Jinja districts during the month of September, 2021. This involved visitation of factories and collection of data using the KoboCollect tool by interviewing general managers as well as human resource managers of the factories. A total of 39 factories were included in the study and were categorized into four major groups; food and beverages (15), plastics (5), construction (8), and others (11). Data analysis was done using STATA version 14.2. <i>Results</i>. Overall adherence to COVID-19 SOPs by the factories was 64.1% (95% CI = 49.1–79.1). Communication and training of employees (79.5%; 95% CI = 66.8–92.2), wearing personal protective equipment (PPE), and respiratory protection (79.5%; 95% CI = 66.8–92.2) as well as enhanced cleaning and disinfection of surfaces (74.4%; 95% CI = 60.6–88.1) were the most implemented SOPs in the factories. Implementation of the SOPs was the highest in Mukono district (88.9%; 95% CI = 68.4–100) and the least in Wakiso district (40.0%; 95% CI = 9.6–70.4). The COVID-19 SOPs were followed mostly in construction material factories (87.5%; 95% CI = 64.6–100) and least in food and beverage factories (40%; 95% CI = 15.2–64.8). There was no significant difference in the adherence of COVID-19 SOPs among the districts (<svg height="11.6412pt" style="vertical-align:-0.04979992pt" version="1.1" viewbox="-0.0498162 -11.5914 15.0284 11.6412" width="15.0284pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"></path></g><g transform="matrix(.0091,0,0,-0.0091,9.945,-5.741)"></path></g></svg> = 5.02 and <span><svg height="8.8423pt" style="vertical-align:-0.2064009pt" version="1.1" viewbox="-0.0498162 -8.6359 19.289 8.8423" width="19.289pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"></path></g><g transform="matrix(.013,0,0,-0.013,11.658,0)"></path></g></svg><span></span><span><svg height="8.8423pt" style="vertical-align:-0.2064009pt" version="1.1" viewbox="22.8711838 -8.6359 21.918 8.8423" width="21.918pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,22.921,0)"></path></g><g transform="matrix(.013,0,0,-0.013,29.161,0)"></path></g><g transform="matrix(.013,0,0,-0.013,32.125,0)"></path></g><g transform="matrix(.013,0,0,-0.013,38.365,0)"></p
背景:冠状病毒病(COVID-19冠状病毒病(COVID-19)是由 SARS-CoV-2 病毒引起的一种传染病。2020 年 3 月 21 日,乌干达确诊了首例 COVID-19 病例,导致该国首次全面封锁。因此,有必要开展一项研究,旨在评估工厂遵守 COVID-19 标准操作程序 (SOP) 的程度,以减轻大流行病的影响。研究方法2021 年 9 月,在瓦基索(Wakiso)、穆科诺(Mukono)、布伊奎(Buikwe)和金贾(Jinja)地区开展了一项横向研究,以评估工厂对 COVID-19 标准操作程序的遵守情况。其中包括走访工厂,并使用 KoboCollect 工具通过采访工厂总经理和人力资源经理来收集数据。研究共涉及 39 家工厂,分为四大类:食品和饮料(15 家)、塑料(5 家)、建筑(8 家)和其他(11 家)。数据分析采用 STATA 14.2 版本。结果工厂对 COVID-19 SOP 的总体遵守率为 64.1%(95% CI = 49.1-79.1)。对员工进行沟通和培训(79.5%;95% CI = 66.8-92.2)、穿戴个人防护设备(PPE)和呼吸保护(79.5%;95% CI = 66.8-92.2)以及加强表面清洁和消毒(74.4%;95% CI = 60.6-88.1)是工厂执行率最高的 SOP。穆科诺区的 SOP 执行率最高(88.9%;95% CI = 68.4-100),瓦基索区最低(40.0%;95% CI = 9.6-70.4)。遵守 COVID-19 标准操作程序的主要是建筑材料厂(87.5%;95% CI = 64.6-100),最少的是食品和饮料厂(40%;95% CI = 15.2-64.8)。各地区(= 5.02 和)和工厂(= 7.04 和)在遵守 COVID-19 SOP 方面没有明显差异。尽管对标准操作程序的总体遵守情况与工厂的位置和类型无关,但对某些标准操作程序的遵守情况,如暴露控制计划、COVID-19标识的存在、社会距离的保持和健康控制计划的实施,却因地区而异。同样,暴露控制计划、COVID-19 标志和保持社会距离也因工厂类型而有显著差异。结论这项研究表明,工厂对 COVID-19 标准操作程序的总体遵守情况一般,但个别标准操作程序的执行水平存在差异。
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引用次数: 0
Development of Deltamethrin-Laced Attractive Toxic Sugar Bait to Control Aedes aegypti (Linnaeus) Population 开发添加溴氰菊酯的诱杀性糖饵来控制埃及伊蚊(林尼厄斯)种群
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2024-01-06 DOI: 10.1155/2024/6966205
Sarita Kumar, Aarti Sharma, Roopa Rani Samal, Vaishali Verma, Ravinder Kumar Sagar, Shri Pati Singh, Kamaraju Raghavendra
Background. The attractive toxic sugar bait (ATSB) is a promising strategy for controlling mosquitoes at the adult stage. The strategy is based on the use of a combination of fruit juice, sugar, and a toxin in order to attract and kill the adult mosquitoes. The selection of the components and optimization of their concentrations is significant for the formulation of an effective ATSB. Methods. The present study formulated nine ATSBs and evaluated their efficacy against two laboratory strains (AND-Aedes aegypti and AND-Aedes aegypti-DL10) and two wildcaught colonized strains of Aedes aegypti (GVD-Delhi and SHD-Delhi). Initially, nine attractive sugar baits (ASBs) were prepared using a mixture of 100% fermented guava juice (attractant) with 10% sucrose solution (w/v) in 1 : 1 ratio. ATSBs were formulated by mixing each ASB with different concentrations of deltamethrin in the ratio of 9 : 1 to obtain final deltamethrin concentration of 0.003125–0.8 mg/10 mL ATSB. Cage bioassays were conducted with 50 mosquitoes for 24 h in order to evaluate the efficacy of each ATSB against the four strains of Ae. aegypti. The data were statistically analyzed using PASW software 19.0 program and 2-way ANOVA. Results. The ATSB formulations registered 8.33–97.44% mortality against AND-Aedes aegypti and 5.15–96.91% mortality against AND-Aedes aegypti-DL10 strains of Ae. aegypti, while GVD-Delhi strain registered 2.04–95.83% mortality and SHD-Delhi strain showed 5.10–97.96% mortality. The administration of 0.8 mg of deltamethrin within 10 mL of attractive toxic sugar bait (ATSB) has led to the maximum mortality rate in adult mosquitoes. Conclusions. The ATSBs formulated with guava juice-ASB and deltamethrin (9 : 1) showed toxin dose-dependent toxicity by all the four strains of Ae. aegypti. Most effective dosage was found as 0.8 mg deltamethrin/10 mL ATSB which imparted 96% to 98% mortality in adult mosquitoes. The investigations demonstrated the efficacy of deltamethrin-laced ATSB formulations against Ae. aegypti and highlighted the need for conduct of structured field trials and investigating the impact on disease vectors and nontarget organisms.
背景。有吸引力的毒糖诱饵(ATSB)是一种在成蚊阶段控制蚊子的有效策略。该策略的基础是使用果汁、糖和毒素的组合来吸引和杀死成蚊。选择成分和优化其浓度对配制有效的 ATSB 至关重要。方法。本研究配制了九种 ATSB,并评估了它们对两种实验室埃及伊蚊菌株(AND-埃及伊蚊和 AND-埃及伊蚊-DL10)和两种野外捕获的定殖埃及伊蚊菌株(GVD-德里和 SHD-德里)的效力。最初,使用 100% 发酵番石榴汁(引诱剂)与 10% 蔗糖溶液(w/v)以 1 :1 的比例混合。将每种 ASB 与不同浓度的溴氰菊酯按 9 : 1 的比例混合,配制成 ATSB:1 的比例混合,以获得 0.003125-0.8 毫克/10 毫升 ATSB 的溴氰菊酯最终浓度。用 50 只蚊子进行了 24 小时的笼式生物测定,以评估每种 ATSB 对四种埃及伊蚊的效力。使用 PASW 软件 19.0 程序和 2 方方差分析对数据进行统计分析。结果ATSB制剂对AND-埃及伊蚊的死亡率为8.33%-97.44%,对AND-埃及伊蚊-DL10株的死亡率为5.15%-96.91%,而GVD-Delhi株的死亡率为2.04%-95.83%,SHD-Delhi株的死亡率为5.10%-97.96%。在 10 毫升有吸引力的有毒糖诱饵(ATSB)中加入 0.8 毫克溴氰菊酯,成蚊死亡率最高。结论用番石榴汁-ASB 和溴氰菊酯(9:1)配制的 ATSB 对所有四种埃及姬蚊都显示出毒素剂量依赖性毒性。发现最有效的剂量为 0.8 毫克溴氰菊酯/10 毫升 ATSB,可使成蚊死亡率达到 96% 至 98%。这些研究表明,掺有溴氰菊酯的 ATSB 配方对埃及姬蚊有效,并强调有必要进行结构化实地试验,调查其对病媒和非目标生物的影响。
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引用次数: 0
Comparative Diagnostic Performance of Microscopy, SD-Bioline Rapid Diagnostic Test, and Polymerase Chain Reaction in the Detection of Malaria Infection among Pregnant Women at Delivery in Kumba Health District Area in the Southwest Region of Cameroon 显微镜、SD-Bioline 快速诊断测试和聚合酶链式反应在检测喀麦隆西南地区昆巴卫生区孕妇分娩时感染疟疾方面的诊断性能比较
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2023-12-13 DOI: 10.1155/2023/2056524
Bekindaka Ngemani Obase, Esemu Livo Forgu, Awanakam Honore Awanakam, Zeukeng Francis, Agnenga Balonga Annie, Nchankou Loic, Jude Daiga Bigoga, Rose Leke, Dickson Shey Nsagha
Introduction. Malaria during pregnancy is a major cause of morbidity and mortality in sub-Saharan Africa. Microcopy and rapid diagnostic test (RDT) recommended by the World Health Organization for clinical diagnosis have poor sensitivity to detect individuals with very low levels of parasitemia. Previous studies have shown that malaria in pregnancy is associated with mastitis and excessive uterine blood loss during delivery. However, information evaluating the performance of these tools in detecting malaria in pregnancy at the national level is limited. This study therefore evaluates the performance of microscopy, RDT, and nested polymerase chain reaction (nPCR) in the detection of pregnancy-associated malaria at delivery. Methods. A total of 227 participants constituting of 201 pregnant women without and 26 with HIV were recruited from five health facilities within the Kumba health district area. Mother venous and cord blood were collected at delivery to test for malaria using the thick-film microscopy, SD-bioline RDT, and 18SrRNA-nested PCR. Results. The percentage of malaria-positive cases detected by thick-film microcopy (TFM), RDT, and PCR in pregnant women with and without HIV was 7.69%, 53.85%, and 50% and 3.48%, 23.38%, and 49.25%, respectively. Plasmodium falciparum was detected in 1.99% cord blood samples of women without HIV by PCR. The positivity rate in at least two of the test methods (composite positive) was 42.31% for women with and 19.90% for women without HIV. The sensitivity of TFM and RDT when using PCR as a reference was 7.21% and 49.00%, respectively, in all samples. The specificity was 99.14% and 90.55% with kappa values of 0.064 and 0.461, respectively. When using the composite test as a reference, the sensitivity of TFM, RDT, and nPCR was 15.69%, 94.12%, and 100%, respectively. Specificity was 99.43%, 93.18%, and 65.34% with kappa values of 0.213, 0.821, and 0.458, respectively. Conclusion. This study shows that PCR is more sensitive in the detection of malaria parasite followed by SD-bioline RDT kit. However, in resource-limited settings where access to molecular diagnosis of malaria is a problem, RDT should be considered as the first option to microscopy in the diagnosis of malaria.
导言。妊娠期疟疾是撒哈拉以南非洲地区发病和死亡的主要原因。世界卫生组织推荐用于临床诊断的显微镜检查和快速诊断检测(RDT)的灵敏度较低,无法检测出寄生虫血症水平很低的个体。以往的研究表明,妊娠期疟疾与乳腺炎和分娩时子宫失血过多有关。然而,在全国范围内评估这些工具在检测妊娠期疟疾方面性能的信息非常有限。因此,本研究评估了显微镜、RDT 和巢式聚合酶链反应(nPCR)在检测分娩时与妊娠有关的疟疾方面的性能。研究方法从昆巴卫生区内的五家医疗机构共招募了 227 名参与者,其中包括 201 名未感染艾滋病毒的孕妇和 26 名感染艾滋病毒的孕妇。在分娩时采集母体静脉血和脐带血,使用厚膜显微镜、SD-bioline RDT 和 18SrRNA 嵌套 PCR 检测疟疾。结果显示通过厚膜显微镜(TFM)、RDT 和 PCR 检测,感染和未感染 HIV 的孕妇中疟疾阳性病例的比例分别为 7.69%、53.85% 和 50%,以及 3.48%、23.38% 和 49.25%。在未感染艾滋病毒的妇女的脐带血样本中,通过 PCR 检测出恶性疟原虫的比例为 1.99%。至少两种检测方法的阳性率(复合阳性)分别为:感染 HIV 的妇女 42.31%,未感染 HIV 的妇女 19.90%。在所有样本中,以 PCR 作为参考的 TFM 和 RDT 的灵敏度分别为 7.21% 和 49.00%。特异性分别为 99.14% 和 90.55%,卡帕值分别为 0.064 和 0.461。以综合检测作为参考,TFM、RDT 和 nPCR 的灵敏度分别为 15.69%、94.12% 和 100%。特异性分别为 99.43%、93.18% 和 65.34%,卡帕值分别为 0.213、0.821 和 0.458。结论这项研究表明,在检测疟原虫方面,PCR 的灵敏度高于 SD-bioline RDT 试剂盒。然而,在资源有限的环境中,疟疾的分子诊断难以获得,因此应考虑将 RDT 作为疟疾诊断中显微镜检查的首选。
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引用次数: 0
Frequency of Gastrointestinal Parasites, Anemia, and Nutritional Status among Children from Different Geographical Regions of Bolivia 玻利维亚不同地区儿童的胃肠道寄生虫感染率、贫血症和营养状况
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2023-12-09 DOI: 10.1155/2023/5020490
Ceilan Apaza, Washington Cuna, Froilán Brañez, Roberto Passera, Celeste Rodriguez
The study aimed to measure the frequency of occurrence of infections with helminths, protozoa, and risk factors of undernutrition and anemia among schoolchildren from the Bolivian highland (altiplano) and lowland (subtropical) rural regions, with a high frequency of gastrointestinal parasite infections. Cross-sectional data were collected from 790 children, 5–13 years old. Microscopic examination of stool using the Ritchie technique, hemoglobin testing using the HemoCue analyzer, and anthropometric measurements were performed. Over 60% and 20% of children were infected with protozoa and helminth parasites, respectively. Infections caused by pathogenic Hymenolepis nana (15.7–5.2%), Ascaris lumbricoides (41.9–28.5%), Giardia lamblia (30.1–11.2%), Entamoeba histolytica (5.7–0.7%), and nonpathogenic Entamoeba coli (48.9–16%), Blastocystis hominis (40.2–28.5%), Iodamoeba butschli (16.1–2.5%), Chilomastix mesnili (19.2–7.3%), and Entamoeba histolytica/dispar (7.4–5.5%) parasites, were more prevalent in the highlands than the lowlands. Single parasitic infections were more prevalent in the lowlands; polyparasitism of light or heavy intensity predominated in the highlands. A strongly increased risk of anemia and a low prevalence of wasting were determined in children in the highlands. A higher risk for stunting was associated with children of older age, and a low burden of intestinal helminths would prevent wasting in children of highlands. Infections with A. lumbricoides and G. lamblia pathogens in older children were not significant covariates for stunting. Environmental, nutritional, and parasitic factors may predispose to anemia in the highlands. A nutritional intervention and parasite control effort will substantially improve children´s health in the highlands.
这项研究旨在测量玻利维亚高原(高原)和低地(亚热带)农村地区学龄儿童中蠕虫和原生动物感染的发生频率,以及营养不良和贫血的风险因素,这些地区是胃肠道寄生虫感染的高发区。我们收集了 790 名 5-13 岁儿童的横断面数据。使用里奇技术对粪便进行了显微镜检查,使用 HemoCue 分析仪对血红蛋白进行了检测,并进行了人体测量。超过 60% 和 20% 的儿童分别感染了原生动物和蠕虫寄生虫。由致病性海门螺杆菌(15.7%-5.2%)、蛔虫(41.9%-28.5%)、贾第鞭毛虫(30.1%-11.2%)、组织溶解恩塔米巴虫(5.7%-0.7%)和非致病性大肠杆菌(48.与低地相比,高地的寄生虫感染率更高。单种寄生虫感染在低地更为普遍,而轻度或重度的多寄生虫感染在高地则占主导地位。在高原地区,儿童贫血的风险大大增加,而消瘦的发病率较低。年龄较大的儿童发育迟缓的风险较高,而肠道蠕虫的低负担可防止高地儿童消瘦。年龄较大的儿童感染疟原虫和羊角疯病原体并不是导致发育迟缓的重要协变量。环境、营养和寄生虫因素可能导致高地儿童贫血。营养干预和寄生虫控制工作将大大改善高原地区儿童的健康状况。
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引用次数: 0
Prevalence of Malaria Parasite among Pregnant Women Attending to Saudi Kassala Teaching Hospital in Kassala State, Eastern Sudan 在苏丹东部卡萨拉州沙特卡萨拉教学医院就诊的孕妇中疟疾寄生虫的流行
IF 2.2 4区 医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2023-11-30 DOI: 10.1155/2023/2289552
Alnaeem Abdalla Idris Nour, Tafawl Ibrahim Karrar, Mohamed Hassan Ahmed Kebayer, Nada Ali Abd Elwahid Mohamed, Khadega Suleiman Mohammed Zarroug, Hajrhma Ismael Hajrhma Mohammedahmed, Mohamed Ahmed Salah Mohamed Ahmed
<i>Objective</i>. Malaria during pregnancy is a priority area for malaria research and control as pregnant women represent a high risk group for severe malaria, and the presentation of malaria during pregnancy varies according to the level of transmission in the area; so the aim of this study is to determine the prevalence rates of malaria parasite among pregnant women attending to Saudi Kassala Teaching hospital in Kassala state, 2022. <i>Methods</i>. A cross-sectional study was carried out in Saudi Kassala Teaching hospital in Kassala State. This study involved one hundred and eighty-five blood samples collected from pregnant women who was then examined by using blood films and ICT for malaria, and the data were collected by a structured questionnaire and analyzed using SPSS version 21. <i>Results</i>. The prevalence of malaria among pregnant women was 2.2% (95% CI: 0.006–0.054). There was no significant difference among the different age groups with respect to the prevalence of malaria (<svg height="8.68572pt" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 8.15071 8.68572" width="8.15071pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"></path></g></svg> value = 0.483). The prevalence of malaria in rural residency was 2.2%, and this was significantly more common than the urban residency (<svg height="8.68572pt" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 8.15071 8.68572" width="8.15071pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><use xlink:href="#g113-81"></use></g></svg> value = 0.021). When compared across the gestational trimesters, there was no significant difference between them (<svg height="8.68572pt" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 8.15071 8.68572" width="8.15071pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><use xlink:href="#g113-81"></use></g></svg> value = 0.518). The number of gravidity is not related to malaria infection (<svg height="8.68572pt" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 8.15071 8.68572" width="8.15071pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><use xlink:href="#g113-81"></use></g></svg> value = 0.737). The presence of symptom compliant of malaria during pregnancy does not suggest the presence of malaria (<svg height="8.68572pt" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 8.15071 8.68572" width="8.15071pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><use xlink:href="#g113-81"></use></g></svg> value = 0.152). No difference was found between the different e
目标。妊娠期疟疾是疟疾研究和控制的一个优先领域,因为孕妇是严重疟疾的高危群体,妊娠期疟疾的发病情况因该地区的传播程度而异;因此,本研究的目的是确定2022年在卡萨拉州沙特卡萨拉教学医院就诊的孕妇中疟疾寄生虫的患病率。方法。在卡萨拉州的沙特卡萨拉教学医院进行了一项横断面研究。本研究收集了185份孕妇的血液样本,然后通过血膜和ICT检查疟疾,数据通过结构化问卷收集,并使用SPSS版本21进行分析。结果。孕妇的疟疾患病率为2.2% (95% CI: 0.006-0.054)。不同年龄组间疟疾患病率差异无统计学意义(值= 0.483)。农村居民疟疾患病率为2.2%,显著高于城市居民(值= 0.021)。在整个妊娠期进行比较时,两者之间无显著差异(值= 0.518)。妊娠数与疟疾感染无关(值= 0.737)。妊娠期出现符合疟疾症状不提示存在疟疾(值= 0.152)。不同教育水平对疟疾患病率的影响没有差异(值= 0.362)。结果185份样本中ICT阳性1例(0.5%),血膜疟疾(BFFM)阳性3例(1.6%),两种方法均阳性,差异无统计学意义(= 0.703)。结论。本研究仅检测到恶性疟原虫。孕妇中的疟疾在农村地区更为普遍。然而,年龄、胎龄、妊娠和教育水平等其他因素并不影响孕妇疟疾的流行。在怀孕期间出现疟疾的症状依从性并不表明存在疟疾。使用ICT或BFFM对妊娠期疟疾的诊断结果类似。
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Journal of Tropical Medicine
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