Journal of Biosafety and Biosecurity最新文献

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A mathematical model for a disease outbreak considering waning-immunity class with nonlinear incidence and recovery rates 考虑到非线性发病率和恢复率的免疫力减弱类疾病爆发数学模型
Journal of Biosafety and Biosecurity Pub Date : 2024-06-26 DOI: 10.1016/j.jobb.2024.05.005
Nursanti Anggriani , Lazarus Kalvein Beay , Meksianis Z. Ndii , Fatuh Inayaturohmat , Sanubari Tansah Tresna
{"title":"A mathematical model for a disease outbreak considering waning-immunity class with nonlinear incidence and recovery rates","authors":"Nursanti Anggriani ,&nbsp;Lazarus Kalvein Beay ,&nbsp;Meksianis Z. Ndii ,&nbsp;Fatuh Inayaturohmat ,&nbsp;Sanubari Tansah Tresna","doi":"10.1016/j.jobb.2024.05.005","DOIUrl":"https://doi.org/10.1016/j.jobb.2024.05.005","url":null,"abstract":"<div><p>In the spread of infectious diseases, intervention levels play a crucial role in shaping interactions between healthy and infected individuals, leading to a nonlinear transmission process. Additionally, the availability of medical resources limits the recovery rate of infected patients, adding further nonlinear dynamics to the healing process. Our research introduces novelty by combining nonlinear incidence and recovery rates alongside waning immunity in an epidemic model. We present a modified SIRW-type model, examining the epidemic problem with these factors. Through analysis, we explore conditions for non-endemic and co-existing cases based on the basic reproduction ratio. The local stability of equilibria is verified using the Routh-Hurwitz criteria, while global stability is assessed using Lyapunov functions for each equilibrium. Furthermore, we investigate bifurcations around both non-endemic and co-existing equilibria. Numerically, we give some simulations to support our analytical findings.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 3","pages":"Pages 170-180"},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000311/pdfft?md5=9a3f3ac37c5d275226798d8df28d62fc&pid=1-s2.0-S2588933824000311-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The association between mycotic pneumonia and neonatal septicemia 霉菌性肺炎与新生儿败血症之间的关系
Journal of Biosafety and Biosecurity Pub Date : 2024-06-26 DOI: 10.1016/j.jobb.2024.06.002
Salman Khalid Salman, Yasir Mufeed Abdulateef, Sawsan Qahtan Taha Al-Quhli
{"title":"The association between mycotic pneumonia and neonatal septicemia","authors":"Salman Khalid Salman,&nbsp;Yasir Mufeed Abdulateef,&nbsp;Sawsan Qahtan Taha Al-Quhli","doi":"10.1016/j.jobb.2024.06.002","DOIUrl":"https://doi.org/10.1016/j.jobb.2024.06.002","url":null,"abstract":"<div><h3>Background</h3><p>Candida species are the fourth most common etiological agents of late-onset infection in the neonatal intensive care unit (NICU) and are responsible for considerable morbidity and mortality.</p></div><div><h3>Objectives</h3><p>From November 2023 to February 2024, we investigated the association of mycotic pneumonia with septicemia in 60 neonates, and their roles of mycotic pneumonia in the morbidity and mortality of neonates in two NICUs in the Al-Ramadi Teaching Hospital for Maternity and Children.</p></div><div><h3>Methods</h3><p>All infants in this study had been diagnosed with septicemia and treated with empirical antimicrobial therapy. An early morning nasogastric tube (NG-tube) was used to collect swallowed sputum by suction for culture and sensitivity testing.</p></div><div><h3>Results</h3><p>The average white blood count for the neonates was 8547 ± 5884.5 cells/mm<sup>2</sup>. The mean C-reactive protein was 39.3 ± 26 mg/l, the mean serum albumin was 2.9 ± 0.2 g/dl and the positive bacterial blood culture was 28 (46.7 %). 9 (15 %) neonates died during the study period. The NG-tube culture identified fungal growth in all samples. Of these, 49 (81.6 %) were identified as <em>Candida albicans</em>, 6 (10 %) as <em>Candida tropicalis</em>, and 5 (8.3 %) as <em>Cryptococcus laurentii</em>. The bacterial culture results from the NG-tube samples identified 13 (21.6 %) patients with gram-positive bacteria and 47 (78.3 %) with gram-negative bacteria.</p></div><div><h3>Conclusion</h3><p>We found a prevalence of Candida spp. among neonates in addition to microbial oxygen tube contamination, indicating a biosafety breach in the neonatal unit. Mycotic infection requires global attention as a probable cause of respiratory failure in neonatal septicemia.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 3","pages":"Pages 137-141"},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000323/pdfft?md5=e98223a68d44a37acdaeed7c16c9e563&pid=1-s2.0-S2588933824000323-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141541035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure-based discovery of F. religiosa phytochemicals as potential inhibitors against Monkeypox (mpox) viral protein 基于结构发现 F. religiosa 植物化学物质作为猴痘 (mpox) 病毒蛋白的潜在抑制剂
Journal of Biosafety and Biosecurity Pub Date : 2024-06-24 DOI: 10.1016/j.jobb.2024.05.004
Ranjan K. Mohapatra , Ahmed Mahal , Pranab K. Mohapatra , Ashish K. Sarangi , Snehasish Mishra , Meshari A. Alsuwat , Nada N. Alshehri , Sozan M. Abdelkhalig , Mohammed Garout , Mohammed Aljeldah , Ahmad A. Alshehri , Ahmed Saif , Mohammed Abdulrahman Alshahrani , Ali S. Alqahtani , Yahya A. Almutawif , Hamza M.A. Eid , Faisal M Albaqami , Mohnad Abdalla , Ali A. Rabaan
{"title":"Structure-based discovery of F. religiosa phytochemicals as potential inhibitors against Monkeypox (mpox) viral protein","authors":"Ranjan K. Mohapatra ,&nbsp;Ahmed Mahal ,&nbsp;Pranab K. Mohapatra ,&nbsp;Ashish K. Sarangi ,&nbsp;Snehasish Mishra ,&nbsp;Meshari A. Alsuwat ,&nbsp;Nada N. Alshehri ,&nbsp;Sozan M. Abdelkhalig ,&nbsp;Mohammed Garout ,&nbsp;Mohammed Aljeldah ,&nbsp;Ahmad A. Alshehri ,&nbsp;Ahmed Saif ,&nbsp;Mohammed Abdulrahman Alshahrani ,&nbsp;Ali S. Alqahtani ,&nbsp;Yahya A. Almutawif ,&nbsp;Hamza M.A. Eid ,&nbsp;Faisal M Albaqami ,&nbsp;Mohnad Abdalla ,&nbsp;Ali A. Rabaan","doi":"10.1016/j.jobb.2024.05.004","DOIUrl":"https://doi.org/10.1016/j.jobb.2024.05.004","url":null,"abstract":"<div><p>Outbreaks of Monkeypox (mpox) in over 100 non-endemic countries in 2022 represented a serious global health concern. Once a neglected disease, mpox has become a global public health issue. A42R profilin-like protein from mpox (PDB ID: 4QWO) represents a potential new lead for drug development and may interact with various synthetic and natural compounds. In this report, the interaction of A42R profilin-like protein with six phytochemicals found in the medicinal plant <em>Ficus religiosa</em> (abundant in India) was examined. Based on the predicted and compared protein–ligand binding energies, biological properties, IC<sub>50</sub> values and toxicity, two compounds, kaempferol (C-1) and piperine (C-4), were selected. ADMET characteristics and quantitative structure–activity relationship (QSAR) of these two compounds were determined, and molecular dynamics (MD) simulations were performed. <em>In silico</em> examination of the kaempferol (C-1) and piperine (C-4) interactions with A42R profilin-like protein gave best-pose ligand-binding energies of –6.98 and –5.57 kcal/mol, respectively. The predicted IC<sub>50</sub> of C-1 was 7.63 μM and 82 μM for C-4. Toxicity data indicated that kaempferol and piperine are non-mutagenic, and the QSAR data revealed that piperlongumine (5.92) and piperine (5.25) had higher log P values than the other compounds examined. MD simulations of A42R profilin-like protein in complex with C-1 and C-4 were performed to examine the stability of the ligand–protein interactions. As/C and C-4 showed the highest affinity and activities, they may be suitable lead candidates for developing mpox therapeutic drugs. This study should facilitate discovering and synthesizing innovative therapeutics to address other infectious diseases.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 3","pages":"Pages 157-169"},"PeriodicalIF":0.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258893382400030X/pdfft?md5=ec15123379db8c297e57ae0d9b373a79&pid=1-s2.0-S258893382400030X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Erratum regarding missing informed consents and ethic approval in previously published articles 关于以前发表的文章中缺少知情同意书和伦理批准的更正
Journal of Biosafety and Biosecurity Pub Date : 2024-06-01 DOI: 10.1016/j.jobb.2024.05.003
{"title":"Erratum regarding missing informed consents and ethic approval in previously published articles","authors":"","doi":"10.1016/j.jobb.2024.05.003","DOIUrl":"https://doi.org/10.1016/j.jobb.2024.05.003","url":null,"abstract":"","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Page 135"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000219/pdfft?md5=b67e62575b4a4adff1684815153d99af&pid=1-s2.0-S2588933824000219-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141541774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyzing co-infection dynamics: A mathematical approach using fractional order modeling and Laplace-Adomian decomposition 共同感染动态分析:使用分数阶建模和拉普拉斯-阿多米分解的数学方法
Journal of Biosafety and Biosecurity Pub Date : 2024-06-01 DOI: 10.1016/j.jobb.2024.05.002
Isa Abdullahi Baba , Fathalla A. Rihan , Evren Hincal
{"title":"Analyzing co-infection dynamics: A mathematical approach using fractional order modeling and Laplace-Adomian decomposition","authors":"Isa Abdullahi Baba ,&nbsp;Fathalla A. Rihan ,&nbsp;Evren Hincal","doi":"10.1016/j.jobb.2024.05.002","DOIUrl":"10.1016/j.jobb.2024.05.002","url":null,"abstract":"<div><p>The co-infection of HIV and COVID-19 is a pressing health concern, carrying substantial potential consequences. This study focuses on the vital task of comprehending the dynamics of HIV-COVID-19 co-infection, a fundamental step in formulating efficacious control strategies and optimizing healthcare approaches. Here, we introduce an innovative mathematical model grounded in Caputo fractional order differential equations, specifically designed to encapsulate the intricate dynamics of co-infection. This model encompasses multiple critical facets: the transmission dynamics of both HIV and COVID-19, the host’s immune responses, and the influence of treatment interventions. Our approach embraces the complexity of these factors to offer an exhaustive portrayal of co-infection dynamics. To tackle the fractional order model, we employ the Laplace-Adomian decomposition method, a potent mathematical tool for approximating solutions in fractional order differential equations. Utilizing this technique, we simulate the intricate interactions between these variables, yielding profound insights into the propagation of co-infection. Notably, we identify pivotal contributors to its advancement. In addition, we conduct a meticulous analysis of the convergence properties inherent in the series solutions acquired through the Laplace-Adomian decomposition method. This examination assures the reliability and accuracy of our mathematical methodology in approximating solutions. Our findings hold significant implications for the formulation of effective control strategies. Policymakers, healthcare professionals, and public health authorities will benefit from this research as they endeavor to curtail the proliferation and impact of HIV-COVID-19 co-infection.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Pages 113-124"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000207/pdfft?md5=5e953fc571289722d8dcd925b1ff0a92&pid=1-s2.0-S2588933824000207-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141032851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chi-square automatic interaction detection (CHAID) analysis of the use of safety goggles and face masks as personal protective equipment (PPE) to protect against occupational biohazards 对使用安全护目镜和口罩作为个人防护设备(PPE)来防范职业生物危害的卡方自动交互检测(CHAID)分析
Journal of Biosafety and Biosecurity Pub Date : 2024-06-01 DOI: 10.1016/j.jobb.2024.05.001
Raúl Aguilar-Elena, Juán José Agún-González
{"title":"Chi-square automatic interaction detection (CHAID) analysis of the use of safety goggles and face masks as personal protective equipment (PPE) to protect against occupational biohazards","authors":"Raúl Aguilar-Elena,&nbsp;Juán José Agún-González","doi":"10.1016/j.jobb.2024.05.001","DOIUrl":"10.1016/j.jobb.2024.05.001","url":null,"abstract":"<div><h3>Background</h3><p>This study represents the first Spanish investigation to rigorously evaluate compliance with the use of safety goggles and face masks as essential personal protective equipment (PPE) in companies with workplaces involving exposure to biological agents.</p></div><div><h3>Objectives</h3><p>This study aimed to examine the degree of use of face masks and safety goggles as personal protective equipment (PPE), the factors that influence their use, and the profile of workers exposed to occupational biological agents in Spanish companies in the health sector, farming sector, meat industry, waste treatment plants, food industry, and veterinary centers.</p></div><div><h3>Methods</h3><p>We conducted a cross-sectional descriptive study involving 590 Spanish workers from 51 companies. We developed a 34-item questionnaire to assess workers’ perception of risk related to exposure to biological agents in their workplaces. Among the questions, three were designed to measure the degree of use of key protective equipment in sectors with biological agent exposure: protective gloves, safety goggles or face masks. We only analyzed safety goggles and face masks. We performed various statistical analyses, including Cronbach’s alpha, frequency of endorsement, content validity ratio using Lawshe’s method, varimax rotation, the Kaiser-Meyer-Olkin test, and Bartlett’s sphericity test, to assess the internal consistency and reliability of the questionnaire. Additionally, we employed a chi-square automatic interaction detection (CHAID) segmentation analysis, using workers’ responses regarding their attitudes toward safety goggles and face mask usage as PPE for protection against biological risks, with demographic variables as independent factors.</p></div><div><h3>Results</h3><p>In the current study, CHAID analysis revealed that workers exposed to group 2 biological agents used more safety goggles and face shields compared with workers exposed to other groups of biological agents. Moreover, workers in laboratories and the food industry used face masks more than workers of other sectors.</p></div><div><h3>Conclusion</h3><p>The CHAID analysis in the current study indicated that workers exposed to biological agents from both group 2 and group 3 demonstrated satisfactory levels of compliance and utilization of protective masks, surpassing their counterparts in terms of usage. Workers in the food and laboratory industries had subpar compliance with preventive measures, and employees from companies with internal health and safety departments exhibited significant adherence to workplace mask usage, safeguarding themselves against biological risks.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Pages 125-133"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000190/pdfft?md5=4e6d1b822442a2758e44cf734863021f&pid=1-s2.0-S2588933824000190-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141145411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
United Nations side event on the Biological Weapons Convention by Tianjin University and City, University of London 天津大学和伦敦城市大学举办的关于《生物武器公约》的联合国会外活动
Journal of Biosafety and Biosecurity Pub Date : 2024-06-01 DOI: 10.1016/j.jobb.2024.06.001
{"title":"United Nations side event on the Biological Weapons Convention by Tianjin University and City, University of London","authors":"","doi":"10.1016/j.jobb.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.jobb.2024.06.001","url":null,"abstract":"","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Page 134"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000220/pdfft?md5=e6383a2cb6198e811a9779c39a386705&pid=1-s2.0-S2588933824000220-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141314734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kalman filter based on a fractional discrete-time stochastic augmented CoVid-19 model 基于分数离散时间随机增强 CoVid-19 模型的卡尔曼滤波器
Journal of Biosafety and Biosecurity Pub Date : 2024-05-14 DOI: 10.1016/j.jobb.2024.04.001
Mohammad Ghani, Dwi Rantini, Maryamah
{"title":"Kalman filter based on a fractional discrete-time stochastic augmented CoVid-19 model","authors":"Mohammad Ghani,&nbsp;Dwi Rantini,&nbsp;Maryamah","doi":"10.1016/j.jobb.2024.04.001","DOIUrl":"10.1016/j.jobb.2024.04.001","url":null,"abstract":"<div><p>In this paper, we study the dynamics of the CoVid-19 outbreak in Semarang, Indonesia, using a fractional CoVid-19 model. We first determine the effects of the isolation rate <span><math><mrow><mi>∊</mi></mrow></math></span> and infection rate <span><math><mrow><mi>β</mi></mrow></math></span> on the reproduction number <span><math><mrow><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span> and infected number <em>V</em>. We find that <span><math><mrow><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span> is directly proportional to <span><math><mrow><mi>β</mi></mrow></math></span> and inversely proportional to <span><math><mrow><mi>∊</mi></mrow></math></span>. For <em>V</em>, the effect of physical distancing is not as significant as changing <span><math><mrow><mi>∊</mi></mrow></math></span>. As <span><math><mrow><mi>∊</mi></mrow></math></span> increases, <em>V</em> decreases, the number of susceptible individuals increases, the number of quarantined individuals decreases sharply, and the number of recovered individuals decreases. Moreover, the effect of vaccination is also considered. The combination of physical distancing, isolation, and vaccination has a significant impact on reducing the number of infected individuals. Analysis of dynamical systems allows us to understand the characteristics of our model, such as its boundedness and non-negativity, the existence of equilibrium points, the existence and uniqueness of solutions, and the local and global stability. To validate our fractional CoVid-19 model, we introduce the fractional extended Kalman filter (FracEKF) as a prediction method and compare the results against reported CoVid-19 data. FracEKF is a modified version of the basic extended Kalman filter with a time-fractional memory effect. The prediction results illustrate the accuracy of this model in terms of the root mean square error (<em>RMSE</em>), normalized root mean square error (<em>NRMSE</em>), and mean absolute percentage error (<em>MAPE</em>) for each fractional-order. Varying <span><math><mrow><mi>∊</mi></mrow></math></span> reproduces the trends observed in the reported data for the number of infected individuals, i.e., when <span><math><mrow><mi>∊</mi></mrow></math></span> increases, the infected number decreases. Moreover, a higher fractional-order results in higher model accuracy. Furthermore, higher values of the process noise <span><math><mrow><msub><mrow><mi>Q</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></math></span> give smaller errors, whereas higher values of the observation noise <span><math><mrow><msub><mrow><mi>R</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></math></span> produce higher errors. <span><math><mrow><msub><mrow><mi>Q</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></math></span> and the fractional-order <span><math><mrow><mi>α</mi></mrow></math></span> are inversely proportional to <span><math><mrow><mi>RMSE</mi><mo>,</mo><mi>NRMSE","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Pages 76-98"},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000189/pdfft?md5=2065ed2bd4837d3db0e2355e9ccfeaa7&pid=1-s2.0-S2588933824000189-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141048701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic evolution of an SVEIR model with variants and non-pharmaceutical interventions for controlling COVID-19 控制 COVID-19 的带有变体和非药物干预措施的 SVEIR 模型的动态演变
Journal of Biosafety and Biosecurity Pub Date : 2024-04-15 DOI: 10.1016/j.jobb.2024.02.002
Ruiyang Zhou , Shaojian Cai , Guangmin Chen , Senzhong Huang , Zhen Jin , Zhihang Peng , Weichuan Lin , Fengying Wei , Kuicheng Zheng
{"title":"Dynamic evolution of an SVEIR model with variants and non-pharmaceutical interventions for controlling COVID-19","authors":"Ruiyang Zhou ,&nbsp;Shaojian Cai ,&nbsp;Guangmin Chen ,&nbsp;Senzhong Huang ,&nbsp;Zhen Jin ,&nbsp;Zhihang Peng ,&nbsp;Weichuan Lin ,&nbsp;Fengying Wei ,&nbsp;Kuicheng Zheng","doi":"10.1016/j.jobb.2024.02.002","DOIUrl":"10.1016/j.jobb.2024.02.002","url":null,"abstract":"<div><p>The epidemiological characteristics and distributions of two epidemics in Fujian Province of Southeast China were attributed to the complex interactions among variant, host, and non-pharmaceutical interventions (NPIs). All reported cases in the Putian epidemic (September 8–October 2, 2021, Delta variant B.1.617.2) and Fuzhou epidemic (October 22–November 18, 2022, Omicron variant BA.5.2) were classified by sex, age group, occupation, and location in this study. Using surveillance data from the Fujian Provincial Center for Disease Control and Prevention, we established a virus-oriented SVEIR (Susceptible–Vaccinated–Exposed–Infected–Recovered) model to investigate the dynamic evolution features of these two variants and the effects of NPIs. The optimal simulations were carried out with variants and scenario investigations. The scenario investigations showed that NPIs significantly reduced the transmission risk and infection scales of COVID-19, and that the Omicron variant was more infectious than the Delta variant. Moreover, the dynamic investigations revealed the increasing tendencies from Delta to Omicron, such as the basic reproduction number, infection rate, percentage of high-risk cases, and the growth rate. Decreasing tendencies were also identified, such as the average recovery period, the awareness delay, and the percentage of symptomatic cases. This study highlighted that NPIs played critical roles in successfully containing the two epidemics. Such interventions are strongly recommended to public health policymakers.</p></div>","PeriodicalId":52875,"journal":{"name":"Journal of Biosafety and Biosecurity","volume":"6 2","pages":"Pages 67-75"},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588933824000050/pdfft?md5=e840458e0acbd9719fcb4c3a34a02694&pid=1-s2.0-S2588933824000050-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140792741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biosafety and biosecurity in the Iraqi Kurdistan Region: Challenges and necessities 伊拉克库尔德斯坦地区的生物安全和生物安保:挑战和必要性
Journal of Biosafety and Biosecurity Pub Date : 2024-04-05 DOI: 10.1016/j.jobb.2024.03.004
Karzan Qurbani, Safin Hussein, Sirwan Khalid Ahmed, Hanaw Darwesh, Seenaa Ali, Haider Hamzah
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