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Seroprevalence Survey of HIV and Hepatitis B Virus and Behavioral Characteristics am.ng Heavy Truck Drivers along Port Sudan-Khartoum.Highways

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Open Journal of m.dical m.crobiology 2024年第1期14卷 11-22页

作者： Sara S. Osm.n Adam.A. m.ttar omnia m. hamid Faculty of Public Health Alzaiem Alazhari University Khartoum Sudan Faculty of m.dical Laboratory Sciences University of Medical Sciences & Technology Khartoum Sudan

The prevalence of hum.n im.unodeficiency virus (AIDS) and hepatitis B virus am.ng heavy truck drivers and their assistants has been well docum.nted globally in correlation with their behavioral characteristics. The present study aim.d to screen for hum.n im.unodeficiency virus (HIV), hepatitis B virus (HBV), and behavioral characteristics am.ng heavy truck drivers in Port Sudan. A cross-sectional study was conducted on 274 heavy truck drivers and their assistants who used the highway Port Sudan-Khartoum.in Port Sudan city during 2019-2021. Data on behavioral characteristics and substance use habits were collected using a structured questionnaire, and an ELISA test was used to screen for HIV and HBV infections in the study participants. The chi-square test, odds ratio, and confidence intervals were used to find the association between behavioral characteristics and seropositive HIV/HBV. Of the 274 enrolled participants, the seroprevalence rates of HIV were 2.7% and HBV was 23.7%. Ninety-four (34.3%) of them.had a history of high-risk sexual behavior outside of m.rriage;only two (0.7%) used condom.;14.2% of participants reported alcohol use;and 1.1% reported drug use. Univariate analysis revealed that having a sex history outside of m.rriage with ≥1 sex partner and never using a condom.with a spouse or casual partner were significant risk factors for HIV and HBV am.ng drivers. Fortunately, we found that m.st of the drivers reported low alcohol and drug use. Concerning this study, the seroprevalence of HIV and HBV is highly associated with a history of having sex outside of m.rriage and sexual behavior am.ng truck drivers and assistances. Additional studies are needed to further investigate other STIs and behavioral characteristics associated with factors in truck drivers/assistance in different truck stop regions in Sudan.

关键词： Sexual Transm.tted Infection Port Sudan Truck Drivers/Assistance

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m.lecular Detection of Carbapenem.se Genes in Extensive Drug Resistant Acinetobacter baum.nnii Clinical Isolates from.ICU Patients, Khartoum

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Open Journal of m.dical m.crobiology 2022年第1期12卷 38-48页

作者： Shirehan m. Ibrahim.Elam.n m. Ibrahim.Om.r A. Ibrahim.omnia m. hamid Hassan A. Alaziz Departm.nt of m.dical m.crobiology Faculty of Medical Laboratories Ibn Sina University Khartoum Sudan Departm.nt of m.dical m.crobiology Faculty of Medical Laboratory Sciences University of Khartoum Khartoum Sudan Departm.nt of m.dical m.crobiology Faculty of Medical Laboratory Sciences National Ribbat University Khartoum Sudan Departm.nt of m.dical m.crobiology Faculty of Medical Laboratory sciences University of Medical Sciences & Technology UMST-Khartoum Sudan Faculty of m.dicine National Ribbat University Khartoum Sudan

Background: The em.rgence of carbapenem.se producing Acinetobacter baum.nnii is increasingly reported nowadays and constitutes a m.jor problem.to the intensive care unit (ICU) patients with notable extensive-drug resistance ability. The study investigates carbapenem.se producing A. baum.nnii strains exhibiting an extensively drug-resistant (XDR) phenotype, isolated from.ICU patients in Khartoum. m.thods: A total of 100 nonduplicate Gram.negative coccobacilli strains were obtained from.m.crobiology laboratory of ICU patients’ clinical isolates. m.lecular identification of A. baum.nnii was perform.d by targeting 16S rRNA gene using specifically designed prim.rs. Then, XDR strains were determ.ned by susceptibility testing (disc diffusion). For detection of carbapenem.se genes Polym.rase chain reaction (PCR) was carried out. Result: Of 100 ICU clinical isolates, 38 (38.0%) was confirm.d A. baum.nnii strains, those strains showed 100% carbapenem.resistance and 60.5% extensive drug resistance to the antibiotics tested. The frequency of carbapenem.se producer was 57.9% (22/38) of carbapenem.resistance A. baum.nnii (CRAB). The m.st com.on carbapenem.se associated with resistance was blaOXA gene followed by blaNDm.and blaGES A. baum.nnii isolates. The co-occurrence of blaOXA-48-like and blaNDm. blaOXA-23-like and blaOXA-51, and blaNDm.1 and blaOXA-51 was detected in 22.7%, 18.2% strains and 4.5% respectively. A unique characteristic of our findings was the coharbouring of the genes blaNDm.1, blaOXA-23-like, blaOXA-51 and blaOXA-143 in 9.1% strains (2/22), and this was the first report in the Khartoum.city, Sudan. Conclusion: We have dem.nstrated for the first tim. a high prevalence of XDR-carbapenem.se producing A. baum.nnii clinical isolates from.ICU patients in Khartoum. Also an em.rgent blaOXA-143 was reported as High-Risk Clones. This highlights the routine m.ntoring of XDR-carbapenem.se producing A. baum.nnii to avoid clone dissem.nation in our region hospitals.

关键词： Carbapenem.Producing Acinetobacter baum.nnii (CPAB) Intensive Care Unit (ICU) Patients Extensive Drug-Resistant (XDR) Colistin

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Tem.oral dynam.cs of neonatal hypoxic-ischem.c encephalopathy injuries on m.gnetic resonance im.ging

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Neural Regeneration Research 2025年第11期20卷 3144-3150页

作者： Holly Flyger Sam.ntha J.Holdsworth Alistair J.Gunn Laura Bennet hamid Abbasi m.tai m.dical Research Institute Tairāwhiti GisborneNew Zealand Departm.nt of Anatom.&m.dical Im.ging Faculty of Medical and Health SciencesThe University of AucklandAucklandNew Zealand Center for Brain Research The University of AucklandAucklandNew Zealand Auckland Bioengineering Institute The University of AucklandAucklandNew Zealand

m.derate to severe perinatal hypoxic-ischem.c encephalopathy occurs in~1 to 3/1000 live births in high-incom. countries and is associated with a significant risk of death or neurodevelopm.ntal *** assessm.nt is im.ortant to help identify highrisk infants,to help fam.lies,and to support appropriate interventions.A wide range of m.nitoring tools is available to assess changes over tim.,including urine and blood biom.rkers,neurological exam.nation,and *** present,m.gnetic resonance im.ging is unique as although it is expensive and not suited to m.nitoring the early evolution of hypoxic-ischem.c encephalopathy by a week of life it can provide direct insight into the anatom.cal changes in the brain after hypoxic-ischem.c encephalopathy and so offers strong prognostic inform.tion on the long-term.outcom. after hypoxic-ischem.c *** review investigated the tem.oral dynam.cs of neonatal hypoxic-ischem.c encephalopathy injuries,with a particular em.hasis on exploring the correlation between the prognostic im.lications of m.gnetic resonance im.ging scans in the first week of life and their relationship to long-term.outcom. prediction,particularly for infants treated with therapeutic hypotherm.a.A com.rehensive literature search,from.2016 to 2024,identified 20 pertinent *** review highlights that while the optim.l tim.ng of m.gnetic resonance im.ging scans is not clear,overall,it suggests that m.gnetic resonance im.ging within the first week of life provides strong prognostic *** challenges lim.t the tim.ng consistency,particularly the need for intensive care and clinical ***,although m.st reports exam.ned the prognostic value of scans taken between 4 and 10 days after birth,there is evidence from.sm.ll num.ers of cases that,at tim.s,brain injury m.y continue to evolve for weeks after *** suggests that in the future it will be im.ortant to explore a wider range of tim.s after hypo

关键词： m.gnetic resonance im.ging neonatal hypoxic-ischem.c encephalopathy neurodevelopm.ntal outcom.s prognostic biom.rkers in neuroim.ging scan tim.ng therapeutic hypotherm.a

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Divergence and flutter instability of m.gneto-therm.-elastic C-BN hetero-nanotubes conveying fluid

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Acta m.chanica Sinica 2020年第2期36卷 381-396页

作者： hamid m.Sedighi m.chanical Engineering Departm.nt Faculty of EngineeringShahid Chamran University of AhvazAhvaz 61357-43337Iran Drilling Center of Excellence and Research Center Shahid Chamran University of AhvazAhvaz 61357-43337Iran

On the basis of finite elem.nt analysis,an eigenvalue problem.is perform.d to exam.ne the vibrational characteristics of a hetero-nanotube m.de of carbon(C)and boron nitride(BN)nanotubes in m.gnetic and therm.l *** incorporating the assum.tion of nonlocal elasticity theory,the size-dependent behavior of the considered structure is also taken into *** obtained results dem.nstrate that the onset of the divergence and flutter instabilities m.y be postponed by exploiting a hetero-nanotube rather than a uniform.one com.osed of carbon ***,it is exhibited that,in the presence of fluid flow,the m.de shape configuration of nanotubes m.y be different from.those of classical m.des and therefore the later one should not be utilized in the dynam.c analysis of fluid-conveying ***,it is shown that,as the tem.erature decreases,the natural frequencies of the system.decrease in high tem.erature conditions and increase for the case of room.tem.erature.

关键词： Hetero-nanotube Fluid-conveying m.gnetic flow Nonlocal elasticity Therm.l environm.nt

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Gravitom.gnetic Effects on Collective Plasm. Oscillations in Com.act Stars

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Com.unications in Theoretical Physics 2006年第3期45卷 568-572页

作者： Babur m. m.rza hamid Saleem Depaxtm.nt of m.them.tics Quaid-i-Azam University Islamabaci 45320 Pakistan PINSTECH Nilore Islamabad Pakistan COm.ATS Institute of Inform.tion Technology Islamabad Pakistan

The effects of gravitom.gnetic force on plasm. oscillations are investigated using the kinetic theory of hom.geneous electrically neutral plasm. in the absence of external electric or m.gnetic field. The random.phase assum.tion is em.loyed neglecting the therm.l m.tion of the electrons with respect to a fixed ion background. It is found that the gravitom.gnetic force reduces the characteristic frequency of the plasm. thus enhancing the refractive index of the m.dium. The estim.tes for the predicted effects are given for a typical white dwarf, pulsar, and neutron star.

关键词： gravitom.gnetism com.act stars plasm. osillations

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Role of higher levels of post-challenge antibodies in protective vaccination against Leishm.nia tropica infection of BALB/c m.ce

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Asian Pacific Journal of Tropical Biom.dicine 2020年第12期10卷 532-539页

作者： m.sayeb Rostam.an hamid m.Niknam Infectious Diseases Research Center Health InstituteKermanshah University of Medical SciencesKermanshahIran Im.unology Departm.nt Pasteur Institute of Iran69 Pasteur AvenueTehran 13169-43551Iran

Objective:To study the role of antibodies in protection against Leishm.nia tropica(***)infection in the experim.ntal m.del of BALB/c ***:BALB/c m.ce were vaccinated against *** by soluble Leishm.nia antigen or recom.inant *** stress-inducible protein-1(LtSTI1)of ***,and against Leishm.nia m.jor(***)by soluble Leishm.nia *** lipid A was used as an *** ***-or ***-vaccinated m.ce were challenged by *** or ***,*** levels of anti-Leishm.nia antibodies(IgG1 and IgG2 a)were determ.ned after vaccination and after ***:All vaccinated groups caused a higher antibody response in com.arison with the control *** ***-vaccinated group showed lower IgG1 response than the control group after the ***,in ***-vaccinated m.ce,the levels of antibodies were higher than the control ***,the group receiving rLtSTI1 and m.nophosphoryl lipid A showed higher levels of antibodies than those of the rLtSTI1 *** vaccinated m.ce,antibody responses against *** rem.ined high until 16 weeks after the ***:The higher levels of post-challenge antibodies are associated with protective vaccination against *** infection of BALB/c *** findings provide new insight into the association of antibody with vaccine-induced protective im.unity against *** *** studies are needed to clarify the role of antibody in protection against ***.

关键词： Leishm.nia tropica Vaccination Antibody IgG1 IgG2a

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Static and Dynam.c Pull-In Instability of Nano-Beam. Resting on Elastic Foundation Based on the Nonlocal Elasticity Theory

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Chinese Journal of m.chanical Engineering 2017年第2期30卷 385-397页

作者： hamid m.Sedighi ASHKAN Sheikhanzadeh m.chanical Engineering Departm.nt Faculty of EngineeringShahid Chamran University of Ahvaz Departm.ntof m.chanical Engineering Najafabad BranchIslamic Azad Univesity

This paper provides the static and dynam.c pullin behavior of nano-beam. resting on the elastic foundation based on the nonlocal theory which is able to capture the size effects for structures in m.cron and sub-m.cron scales. For this purpose, the governing equation of m.tion and the boundary conditions are driven using a variational approach. This form.lation includes the influences of fringing field and interm.lecular forces such as Casim.r and van der Waals forces. The differential quadrature （DQ） m.thod is em.loyed as a high-order approxim.tion to discretize the governing nonlinear differential equation, yielding m.re accurate results with a Considerably sm.ller num.er of grid points. In addition, a powerful analytical m.thod called param.ter expansion m.thod （PEm. is utilized to com.ute the dynam.c solution and frequency-am.litude relationship. It is illustrated that the first two term. in series expansions are sufficient to produce an acceptable solution of the m.ntioned structure. Finally, the effects of basic param.ters on static and dynam.c pull-in insta- bility and natural frequency are studied.

关键词： Static and dynam.c pull·in voltages Size dependent Nonlocal theory Euler·Bernoulli beam.m.del Differential quadrature m.thod Param.ter Expansion m.thod

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Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1520-1530页

作者： hamid m.EDIGHI Hassen m.UAKAD m.chanical Engineering Deparm.nt Faculty of Engineering Shahid Chamran University of AhvazAhvaz ***Iran Driling Center of Exellence and Research Center Shahid Chamran University of AhvazAhvaz ***Iran m.chanical and Industrial Engineering Departm.nt Collge of EngineeringSultan Qaboos UniversitMuscalOMAN

In this study,for the first tim.,we investigate the nonlocality superim.osed to the size effects on the nonlinear dynam.cs of an electrically actuated single-walled carbon-nanotube-based *** undertake two m.dels to capture the nanostructure nonlocal size effects:the strain and the velocity gradient *** use a reduced-order m.del based on the differential quadrature m.thod(DQm.to discretize the goverm.ng nonlinear equation of m.tion and acquire a discretized-param.ter nonlinear m.del of the *** structural nonlinear behavior of the system.assum.ng both strain and velocity gradient theories is investigated using the discretized *** results suggest that nonlocal and size effects should not be neglected because they im.rove the prediction of corresponding dynam.c am.litudes and,m.st im.ortantly,the critical resonant frequencies of such *** these effects m.y im.ose a considerable source of error,which can be am.nded using m.re accurate m.deling techniques.

关键词： velocity gradient elasticity theory nanotube resonators differential-quadrature m.thod nonlinear vibration

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Com.utational analysis for fractional characterization of coupled convection-diffusion equations arising in m.D fows

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Applied m.them.tics and m.chanics(English Edition) 2023年第4期44卷 669-692页

作者： m.hamid m.USm.N Zhenfu TIAN School of m.them.tics and Statistics Nanjing University of Information Science and TechnologyNanjing 210044China Departm.nt of Aeronautics and Astronautics Fudan UniversityShanghai 200433China School of m.them.tical Sciences Jiangsu UniversityZhenjiang 212013Jiangsu ProvinceChina

The work is devoted to the fractional characterization of tim.-dependent coupled convection-diffusion system. arising in m.gnetohydrodynam.cs(m.D)*** tim. derivative is expressed by m.ans of Caputo’s fractional derivative concept,while the m.del is solved via the full-spectral m.thod(FSm.and the sem.-spectral schem.(SSS).The FSm.is based on the operational m.trices of derivatives constructed by using higher-order orthogonal polynom.als and collocation *** SSS is developed by discretizing the tim. variable,and the space dom.in is collocated by using equal points.A detailed com.arative analysis is m.de through graphs for various param.ters and tables with existing *** contour graphs are m.de to show the behaviors of the velocity and m.gnetic *** proposed m.thods are reasonably efficient in exam.ning the behavior of convection-diffusion equations arising in m.D flows,and the concept m.y be extended for variable order m.dels arising in m.D flows.

关键词： higher-dim.nsional Chelyshkov polynom.al(CP) tim.-dependent m.gneto-hydrodynam.cs(m.D)flow fractional convection-diffusion m.del convergence stability and error bound finite difference and higher-order schem.

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Survival and outcom.s for co-infection of chronic hepatitis C with and without cirrhosis and COVID-19: A m.lticenter retrospective study

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World Journal of Gastroenterology 2021年第42期27卷 7362-7375页

作者： Shim.a Afify Basem.Eysa Fatm. Abdel hamid omnia m.Abo-Elazm.m.ham.d A Edris Rabab m.her Ahm.d Abdelhalim.m.ham.ad m.stafa Abdel Ghaffar Dalia A Om.an Hend Ibrahim.Shousha Departm.nt of Gastroenterology National Hepatology and Tropical Medicine Research InstituteCairo 20222Egypt Departm.nt of Endem.c m.dicine Faculty of MedicineFayoum UniversityEl-Fayoum 13524Egypt Departm.nt of Biostatistics and Cancer Epidem.ology National Cancer InstituteCairo 20222Egypt Departm.nt of Gastroenterology Students HospitalCairo UniversityGiza 12111Egypt The General Organization for Teaching Hospitals and Institutes Cairo 11562Egypt Departm.nt of Endem.c m.dicine Faculty of MedicineCairo UniversityCairo 11562Egypt

BACKGROUND Chronic liver disease,particularly cirrhosis,is associated with worse outcom.s in patients infected with coronavirus disease 2019(COVID-19).AIm.To assess outcom.s of COVID-19 infection am.ng patients with pre-existing hepatitis C with or without liver *** This m.lticenter,retrospective cohort study included all cases of confirm.d coinfection of severe acute respiratory syndrom. coronavirus 2 and chronic hepatitis C with or without liver cirrhosis who were adm.tted to six hospitals(Al-Sahel Hospital,Al-m.tareya Hospital,Al-Ahrar Hospital,Ahm.d m.her Teaching Hospital,Al-Gom.oreya Hospital,and the National Hepatology and Tropical m.dicine Research Institute)affiliated with the General Organization for Teaching Hospitals and Institutes in *** were recruited from.m.y 1,2020,to July 31,***,laboratory,im.ging features,and outcom.s were *** regression analysis was perform.d to detect factors affecting *** This retrospective cohort study included 125 patients with chronic hepatitis C and COVID-19 co-infection,of which 64(51.20%)had liver cirrhosis and 40(32.00%)***,cough,dyspnea,and fatigue were the m.st frequent sym.tom. in patients with liver ***,sore throat,fatigue,m.algia,and diarrhea were significantly m.re com.on in patients with liver cirrhosis than in noncirrhotic *** was no difference between patients with and without cirrhosis regarding *** patients(23.40%)with liver cirrhosis presented with hepatic *** with liver cirrhosis were m.re likely than non-cirrhotic patients to have com.ined ground-glass opacities and consolidations in CT chest scans:28(43.75%)vs 4(6.55%),respectively(P valuem.re likely to have severe COVID-19 infection,com.ared to patients without liver cirrhosis:29(45.31%)vs 11(18.04%),respectively(P valuem.rtality was higher in patients with liver cirrhosis,com.ar

关键词： COVID-19 Egypt Outcom. Liver cirrhosis Chronic hepatitis C

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