Publications by authors named "Md A Ahmed"

Article Synopsis
  • PfRh5 has shown promise as a malaria vaccine candidate due to its key role in merozoite invasion and overall stability, with recent trials indicating its safety and effectiveness.
  • A study was conducted in Tanzanian regions known for high malaria transmission to assess genetic variation and immune responses to PfRh5 in asymptomatic carriers, revealing some new mutations but overall genetic conservation.
  • Results indicated variable immune response sensitivity tied to age, with the findings highlighting the importance of ongoing monitoring of vaccine efficacy and antigenic variation to improve malaria vaccine development.
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Objectives: Frail patients are at greater risk of experiencing adverse clinical outcomes in any critical illness due to decreased physiologic reserves, greater susceptibility to the adverse effects of treatment, and greater needs for intensive care. In this study, we sought to assess the prevalence of frailty and associated adverse in-hospital outcomes among coronavirus disease 2019 (COVID-19) hospitalizations using the 2020 California State Inpatient Database (SID).

Methods: For this study, we conducted a retrospective analysis of data from all COVID-19 hospital patients aged 18 years and older.

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Article Synopsis
  • A systematic review was conducted to evaluate the use of stereotactic radiosurgery (SRS) specifically in pediatric patients, aiming to inform guidelines by the International Stereotactic Radiosurgery Society (ISRS).
  • The study analyzed 68 articles focusing on outcomes for around 400 children with brain tumors and over 5000 with arteriovenous malformations (AVMs) from 1989 to 2021, reporting varying local control rates for different tumor types.
  • The findings indicated that SRS demonstrated suitable local control rates for pediatric brain tumors and AVMs, but data availability is limited, leading to the development of ISRS consensus guidelines for its use in this population.
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Wearable alcohol monitoring devices demand noninvasive, real-time measurement of blood alcohol content (BAC) reliably and continuously. A few commercial devices are available to determine BAC noninvasively by detecting transcutaneous diffused alcohol. However, they suffer from a lack of accuracy and reliability in the determination of BAC in real time due to the complex scenario of the human skin for transcutaneous alcohol diffusion and numerous factors (e.

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Malaria eradication efforts in resource-limited areas require a rapid, economical, and accurate tool for detecting of the low parasitemia. The malaria rapid diagnostic test (mRDT) is the most suitable for on-site detection of the deadliest form of malaria, Plasmodium falciparum. However, the deletions of histidine rich protein 2 and 3 genes are known to compromise the effectiveness of mRDT.

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Objectives: Many epidemiological studies have shown that coronavirus disease 2019 (COVID-19) disproportionately affects males, compared with females, although other studies show that there were no such differences. The aim of the present study was to assess differences in the prevalence of hospitalizations and in-hospital outcomes between the sexes, using a larger administrative database.

Methods: We used the 2020 California State Inpatient Database for this retrospective analysis.

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In the US, racial disparities in hospital outcomes are well documented. We explored whether race was associated with all-cause in-hospital mortality and intensive care unit (ICU) admission among COVID-19 patients in California. This was a retrospective analysis of California State Inpatient Database during 2020.

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Article Synopsis
  • The study explores the impact of acute myocardial infarction (AMI) on hospital outcomes for COVID-19 patients using data from over 94,000 hospitalizations in California during 2020.
  • Results revealed that patients with AMI experienced significantly higher rates of in-hospital mortality (43.2% vs. 10.8%), longer hospital stays, and greater need for vasopressors, mechanical ventilation, and ICU admission compared to those without AMI.
  • Despite AMI being rare in COVID-19 cases (only 1.6%), the findings emphasize the need for aggressive treatment for these patients to improve their hospital outcomes.
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The Achilles tendon is frequently injured in the young to middle aged population. Previous studies have shown that there is an increased risk of delay in postsurgical wound healing amongst tobacco smoking patients with Achilles tendon injury. This study utilized the American College of Surgeons National Surgical Quality Improvement Project (ACS-NSQIP) database.

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Background: In the US, between 2018 and 2019, approximately $57 billion were expended on stroke and related conditions. The aim of this study was to understand trends in direct healthcare expenditures among stroke patients using novel cost estimation methods and a nationally representative database.

Methods: This study was a retrospective analysis of 193,003 adults, ≥18 years of age, using the Medical Expenditure Panel Survey during 2009-2016.

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  • The cell-traversal protein CelTOS is a key malaria vaccine candidate, vital for malaria parasite invasion in humans and mosquitoes.
  • A study analyzed its genetic diversity and found significant variations, especially at the 3' end of the gene, indicating positive selection in clinical samples.
  • Epitope prediction identified potential vaccine targets, highlighting a significant peptide region (IKPPRIKED) for future research in malaria vaccine development.
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Background: Studies on frailty among pediatric patients with cancer are scarce. In this study, we sought to understand the effects of frailty on hospital outcomes in pediatric patients with cancer.

Methods: This retrospective study used data collected and stored in the Nationwide Inpatient Sample (NIS) between 2005 and 2014.

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Toxoplasma gondii host cellular invasion factors such as the rhoptry proteins, micronemal antigens, or other subcellular compartment proteins have shown limited vaccine efficacies. T. gondii cyst wall protein (CST1) as a cyst persistence factor is critical for cyst wall integrity and bradyzoite persistence.

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Respiratory syncytial virus (RSV) causes severe lower respiratory tract disease in children and the elderly. However, there are no effective antiviral drugs or licensed vaccines available for RSV infection. Here, RSV virus-like particle (VLP) vaccines expressing Pre-F, G, or Pre-F and G proteins on the surface of influenza virus matrix protein 1 (M1) were produced using the baculovirus expression system, and their protective efficacy was evaluated in mice.

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Major adverse cardiovascular and cerebrovascular events (MACCE) is an important cause of morbidity and mortality during perioperative period. In this study, we looked for national trends in perioperative MACCE and its components as well as cancer types associated with high rates of perioperative MACCE during major cancer surgeries. This study was a retrospective analysis of the National Inpatient Sample, 2005-2014.

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Purpose: There are very few studies that have compared the short-term outcomes of laparoscopic Roux-en-Y gastric bypass (LRYGB) and laparoscopic sleeve gastrectomy (LSG). Among short-term outcomes, hospital readmission after these procedures is an area for quality enhancement and cost reduction. In this study, we compared 30-day readmission rates after LSG and LRYGB through analyzing a nationalized dataset.

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This study examined how frailty in traditional risk-adjusted models could improve the predictability of unplanned 30-day readmission and mortality among heart failure patients. This study was a retrospective analysis of Nationwide Readmissions Database data collected during the years 2010-2018. All patients ≥65 years who had a principal diagnosis of heart failure were included in the analysis.

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The simian malaria parasite causes a high number of zoonotic infections in Malaysia. The thrombospondin-related apical merozoite protein (TRAMP) is an essential ligand for binding to the erythrocyte cell surface, whereby it facilitates the invasion. This study is the first attempt to determine the genetic diversity, phylogeography, natural selection and population structure from 97 full-length gene sequences originating from Malaysia.

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Recombinant vaccinia viruses (rVV) are effective antigen delivery vectors and are researched widely as vaccine platforms against numerous diseases. Apical membrane antigen 1 (AMA1) is one of the candidate antigens for malaria vaccines but rising concerns regarding its genetic diversity and polymorphism have necessitated the need to search for an alternative antigen. Here, we compare the efficacies of the rVV vaccines expressing either AMA1 or microneme protein (MIC) of in mice.

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Heterologous immunization is garnering attention as a promising strategy to improve vaccine efficacy. Vaccines based on recombinant baculovirus (rBV) and virus-like particle (VLP) are safe for use, but heterologous immunization studies incorporating these two vaccine platforms remain unreported to date. Oral immunization is the simplest, most convenient, and safest means for mass immunization.

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Purpose: To assess the effects of COVID-19 on hospitalizations for intracranial meningioma resection using a large database.

Methods: We conducted a retrospective analysis of the California State Inpatient Database (SID) 2019 and 2020. All adult (18 years or older) hospitalizations were included for the analysis.

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Coronavirus disease 2019 (COVID-19) could be a risk factor for acute ischemic stroke (AIS) due to the altered coagulation process and hyperinflammation. This study examined the risk factors, clinical profile, and hospital outcomes of COVID-19 hospitalizations with AIS. This study was a retrospective analysis of data from California State Inpatient Database (SID) during 2019 and 2020.

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Many case reports have indicated that myocarditis could be a prognostic factor for predicting morbidity and mortality among patients with COVID-19. In this study, using a large database we examined the association between myocarditis among COVID-19 hospitalizations and in-hospital mortality and other adverse hospital outcomes. The present study was a retrospective analysis of data collected in the California State Inpatient Database during 2020.

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The thrombospondin related anonymous protein (TRAP) is considered one of the most important pre-erythrocytic vaccine targets. Earlier population genetic studies revealed the gene to be under strong balancing natural selection. This study is the first attempt to analyze genetic diversity, natural selection, phylogeography and population structure in 199 clinical samples from Saudi Arabia using the full-length gene.

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