Publications by authors named "Ruth Namazzi"

Article Synopsis
  • A study conducted in Uganda followed children aged 6 months to 4 years who were discharged from the hospital after being treated for specific severe malaria manifestations, comparing their post-discharge health to asymptomatic community children.
  • Over 12 months, 56.6% of children with severe malaria experienced one or more hospitalizations, significantly higher than the 30.8% of community children, with a majority of the hospitalizations being malaria-related.
  • The findings indicate a pressing need for research into post-discharge malaria prevention treatments to help reduce the healthcare burden on children who have suffered from severe malaria.
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The spectrum of hematological diseases in African children includes anemias, bleeding disorders, thromboses, and oncological diseases such as leukemias. While data are limited, outcomes for these diseases are poorer in Africa. The dearth of specialists, and lack of infrastructure that supports diagnosis and management, have been identified as key barriers to improving outcomes for childhood hematological disorders in sub-Saharan Africa (SSA).

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Introduction: Few studies have described post-discharge morbidity of children with specific manifestations of severe malaria (SM) beyond severe malarial anemia or cerebral malaria.

Methods: Children 6 months to 4 years of age admitted at Jinja and Mulago hospitals in Uganda, with one or more of the five most common manifestations of SM, cerebral malaria (n=53), respiratory distress syndrome (n=108), malaria with complicated seizures (n=160), severe malarial anemia (n=155) or prostration (n=75), were followed for 12 months after discharge, along with community children (CC) (n=120) recruited from the household or neighborhood of the children with SM. Incidence and risk of post-discharge readmission, death or outpatient clinic visits were compared between children with SM and CC.

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Article Synopsis
  • Children with severe malarial anemia (SMA) have low in-hospital mortality but face high risks of readmission or death after discharge, potentially due to factors impacting blood production and vascular health.
  • A study of 145 children in Kampala, Uganda, showed that higher plasma levels of platelet-derived growth factor-BB (PDGF-BB) and vascular endothelial growth factor (VEGF) upon admission were linked to a significantly lower risk of readmission or death within 12 months.
  • The findings suggest that these angiogenesis-promoting factors may help reduce the likelihood of severe malaria recurrences in these children.
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  • Co-infection with intestinal helminths and malaria is common in certain communities, but the relationship between these infections and malaria severity remains unclear.
  • A study analyzed stool samples from children with severe malaria and asymptomatic children in Uganda, finding a very low prevalence of intestinal helminth infections in both groups.
  • The results indicated that helminth infections were not linked to increased risk of severe malaria, which may be attributed to the success of Uganda's national deworming program introduced in 2003.
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Background: Cardiopulmonary resuscitation (CPR) is an emergency procedure performed to restore heart function to minimize anoxic injury to the brain following cardiac arrest. Despite the establishment of emergency department and training on Pediatric Advanced Life Support (PALS) at Muhimbili National Hospital (MNH) the outcomes of pediatric in-hospital cardiac arrest have not been documented. We ought to determine the outcomes and factors associated with 24-h survival after pediatric in-hospital cardiac arrests at MNH in Tanzania.

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Article Synopsis
  • The study aimed to evaluate the relationship between the perfusion index (PI), a noninvasive tool, and clinical markers of perfusion in critically ill children hospitalized with severe malaria, investigating its potential to identify those at higher risk of mortality.
  • Conducted in two hospitals in Uganda, the research analyzed data from 600 children under five with severe malaria and found that lower admission PI correlated with clinical signs of poor perfusion and complications, as well as higher mortality odds.
  • The results indicated that consecutive low PI measures (< 1%) were predictive of mortality, suggesting that PI could serve as an important indicator for managing severe malaria in pediatric patients.
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Article Synopsis
  • - Unexplained increases in blackwater fever (BWF) in Eastern Uganda prompted a study examining how immune complexes and glucose-6-phosphate dehydrogenase (G6PD) deficiency relate to severe malaria (SM) in children.
  • - The study, involving 557 children with SM and 101 community children, found that those with SM had significantly higher levels of circulating immune complexes (cIC), which were linked to complications like severe anemia and jaundice, along with predicting readmissions.
  • - G6PD deficiency, particularly in males, was shown to elevate cIC levels, and the analysis indicated that this deficiency contributes to recurring severe anemia and BWF due to the presence of these immune complexes.
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Background: Sub-Saharan Africa bears the highest burden of sickle cell disease (SCD) globally with Nigeria, Democratic Republic of Congo, Tanzania, Uganda being the most affected countries. Uganda reports approximately 20,000 SCD births annually, constituting 6.67% of reported global SCD births.

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Risk stratification and molecular targeting have been key to increasing cure rates for pediatric cancers in high-income countries. In contrast, precise diagnosis in low-resource settings is hindered by insufficient pathology infrastructure. The Global HOPE program aims to improve outcomes for pediatric cancer in Sub-Saharan Africa (SSA) by building local clinical care and diagnostic capacity.

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Article Synopsis
  • People with sickle cell anemia often need blood transfusions, and hydroxyurea can help reduce this need, but access and dosage challenges hinder its use in Africa.
  • The ADAPT trial will investigate how hydroxyurea affects transfusion rates and whether personalized dosing through pharmacokinetics can improve treatment in children with SCA in Uganda.
  • Success in reducing transfusion reliance and optimizing hydroxyurea dosing could enhance access to this life-saving treatment for sickle cell anemia across sub-Saharan Africa.
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After starting hydroxyurea treatment, Ugandan children with sickle cell anemia had 60% fewer severe or invasive infections, including malaria, bacteremia, respiratory tract infections, and gastroenteritis, than before starting hydroxyurea treatment (incidence rate ratio, 0.40 [95% confidence interval, 0.29-0.

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Background: Malaria is an important cause of mortality in African children. Identification of biomarkers to identify children at risk of mortality has the potential to improve outcomes.

Methods: We evaluated 11 biomarkers of host response in 592 children with severe malaria.

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Background: Globally, a very high percentage of acute kidney injury (AKI) occurs in low- and middle-income countries (LMICs) where late recognition contributes to increased mortality. There are challenges with using existing biomarkers of AKI in LMICs. Emerging evidence suggests renin may serve as a biomarker of kidney injury that can overcome limitations in creatinine-based diagnostics.

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Severe anemia is an important contributor to mortality in children with severe malaria. Anemia in malaria is a multi-factorial complication, since dyserythropoiesis, hemolysis and phagocytic clearance of uninfected red blood cells (RBCs) can contribute to this syndrome. High levels of oxidative stress and immune dysregulation have been proposed to contribute to severe malarial anemia, facilitating the clearance of uninfected RBCs.

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Objectives: To assess whether viral, bacterial, metabolic, and autoimmune diseases are missed by conventional diagnostics among children with severe acute encephalopathy in sub-Saharan Africa.

Study Design: One hundred thirty-four children (6 months to 18 years) presenting with nontraumatic coma or convulsive status epilepticus to 1 of 4 medical referral centers in Uganda, Malawi, and Rwanda were enrolled between 2015 and 2016. Locally available diagnostic tests could be supplemented in 117 patients by viral, bacterial, and 16s quantitative polymerase chain reaction testing, metagenomics, untargeted metabolomics, and autoimmune immunohistochemistry screening.

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Introduction: Wilms tumor therapy in low- and middle-income countries (LMICs) relies on treatment protocols adapted to resource limitations, but these protocols have rarely been evaluated in real-world settings. Such evaluations are necessary to identify high-impact research priorities for clinical and implementation trials in LMICs. The purpose of this study was to identify highest priority targets for future clinical and implementation trials in sub-Saharan Africa by assessing outcomes of a resource-adapted treatment protocol in Malawi.

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Data from small clinical trials in the United States and India suggest zinc supplementation reduces infection in adolescents and adults with sickle cell anemia (SCA), but no studies of zinc supplementation for infection prevention have been conducted in children with SCA living in Africa. We conducted a randomized double-blind placebo-controlled trial to assess zinc supplementation for prevention of severe or invasive infections in Ugandan children 1.00-4.

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Neuroblastoma (NB) is the most common extracranial solid tumor of childhood. The complete burden and outcomes in Uganda are unknown. The study was a multicenter retrospective chart review of children aged between 0 to 15 years diagnosed with NB from 2010 to 2020.

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Purpose Of Review: Low-income and middle-income countries (LMICs), primarily in sub-Saharan Africa (SSA), predominantly experience the burden of sickle cell disease (SCD). High frequency of acute and chronic complications leads to increased utilization of healthcare, which burdens fragile health systems. Mortality for children with limited healthcare access remains alarmingly high.

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Article Synopsis
  • Global changes in amino acid levels were studied in Ugandan children with severe malaria (SM) to assess their long-term health outcomes, particularly kidney function and cognition.
  • The study found deficiencies in certain sulfur-containing amino acids and identified specific amino acid increases related to mortality and chronic kidney disease (CKD).
  • Unique amino acid profiles in children with SM were linked to negative health consequences, including higher risks of mortality and cognitive issues, especially attention problems in younger children.
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  • Severe malaria (SM) leads to increased risk of invasive bacterial infections and demonstrates gastrointestinal permeability issues, particularly in children aged 6 months to 4 years.
  • A study analyzed intestinal injury biomarkers, TFF3 and I-FABP, in 598 children with SM, revealing significant elevations in these markers compared to 120 healthy children, indicating intestinal injury is common among those with SM.
  • Elevated TFF3 levels were linked to higher in-hospital mortality rates, as well as associations with acute kidney injury and acidosis, suggesting that potential interventions for intestinal repair could improve patient outcomes.
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