Publications by authors named "Kirkby Tickell"

Article Synopsis
  • HEU (HIV-exposed uninfected) children face a higher risk of hospitalization and mortality compared to HUU (HIV-unexposed uninfected) children, prompting a closer look at their health outcomes.
  • A study of 1486 children revealed that HEU children had significantly higher rates of hospitalization mortality and were more prone to wasting and stunting.
  • Despite similar illness severity and resource use in hospitals, HEU children had longer stays and a two-fold increased risk of dying within 30 days of hospitalization compared to HUU peers.
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Article Synopsis
  • * A machine learning approach was applied using data from the VIDA and EFGH-Shigella studies in rural Kenya to create predictive models for LGF among children aged 6-35 months, encompassing 65 potential predictors including demographic and health-related factors.
  • * The models showed a prevalence of LGF at 16.9% and 22.4% in different cohorts, with the gradient boosting model providing the best prediction accuracy, demonstrating its usefulness in identifying at-risk children for targeted healthcare interventions
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In sub-Saharan Africa, children with severe malnutrition (SM) and HIV have substantially worse outcomes than children with SM alone, facing higher mortality risk and impaired nutritional recovery post-hospitalisation. Biological mechanisms underpinning this risk remain incompletely understood. This case-control study nested within the CHAIN cohort in Kenya, Uganda, Malawi, and Burkina Faso examined effect of HIV on six months post-discharge growth among children with SM and those at risk of malnutrition, assessed proteomic signatures associated with HIV in these children, and investigated how these systemic processes impact post-discharge growth in children with SM.

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Introduction: Children with moderate or severe wasting are at particularly high risk of recurrent or persistent diarrhoea, nutritional deterioration and death following a diarrhoeal episode. Lactoferrin and lysozyme are nutritional supplements that may reduce the risk of recurrent diarrhoeal episodes and accelerate nutritional recovery by treating or preventing underlying enteric infections and/or improving enteric function.

Methods And Analysis: In this factorial, blinded, placebo-controlled randomised trial, we aim to determine the efficacy of lactoferrin and lysozyme supplementation in decreasing diarrhoea incidence and improving nutritional recovery in Kenyan children convalescing from comorbid diarrhoea and wasting.

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Background: Antimicrobial resistance (AMR) is a global threat to infectious disease control, particularly among recently hospitalized children. We sought to determine the prevalence and mitigating factors of resistance in enteric among children discharged from health facilities in western Kenya.

Methods: Between June 2016 and November 2019, children aged 1 to 59 months were enrolled at the point of discharge from the hospital.

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Background: The emergence and spread of β-lactamase-producing Klebsiella spp. has been associated with a substantial healthcare burden resulting in therapeutic failures. We sought to describe the proportion of phenotypic resistance to commonly used antibiotics, characterize β-lactamase genes among isolates with antimicrobial resistance (AMR), and assess the correlates of phenotypic AMR in Klebsiella spp.

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Background: is a leading cause of acute watery diarrhea, dysentery, and diarrhea-attributed linear growth faltering, a precursor to stunting and lifelong morbidity. Several promising vaccines are in development and field efficacy trials will require a consortium of potential vaccine trial sites with up-to-date diarrhea incidence data.

Methods: The Enterics for Global Health (EFGH) surveillance study will employ facility-based enrollment of diarrhea cases aged 6-35 months with 3 months of follow-up to establish incidence rates and document clinical, anthropometric, and financial consequences of diarrhea at 7 country sites (Mali, Kenya, The Gambia, Malawi, Bangladesh, Pakistan, and Peru).

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Background: Rigorous data management systems and planning are essential to successful research projects, especially for large, multicountry consortium studies involving partnerships across multiple institutions. Here we describe the development and implementation of data management systems and procedures for the Enterics For Global Health (EFGH) surveillance study-a 7-country diarrhea surveillance study that will conduct facility-based surveillance concurrent with population-based enumeration and a health care utilization survey to estimate the incidence of -associated diarrhea in children 6 to 35 months old.

Methods: The goals of EFGH data management are to utilize the knowledge and experience of consortium members to collect high-quality data and ensure equity in access and decision-making.

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Background: Growth faltering is well-recognized during acute childhood illness and growth acceleration during convalescence, with or without nutritional therapy, may occur. However, there are limited recent data on growth after hospitalization in low- and middle-income countries.

Methods: We evaluated growth following hospitalization among children aged 2-23 months in sub-Saharan Africa and South Asia.

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Article Synopsis
  • This study assessed how often healthcare providers followed guidelines for treating common illnesses in young children in low-resource settings across six Asian and African countries.
  • It found that only 32-34% of children with diarrhoea and pneumonia received fully compliant care, with non-adherence particularly noted for treatments like oxygen and antibiotics.
  • Factors like older age, severity of illness, and lower economic status were linked to higher rates of guideline non-adherence, suggesting areas for improvement in healthcare practices.
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Article Synopsis
  • * Risk factors for stunting include being older (12-59 months), having HIV or being HIV-exposed, and not being exclusively breastfed, while lower caregiver education and poor sanitation conditions also contribute significantly.
  • * Hospital discharge provides a critical chance to identify stunted children and implement targeted nutritional interventions to improve their long-term health outcomes.
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Dehydration is a major cause of death among children with wasting and diarrhea. We reviewed the evidence for the identification and management of dehydration among these children. Two systematic reviews were conducted to assess 1) the diagnostic performance of clinical signs or algorithms intended to measure dehydration, and 2) the efficacy and safety of low-osmolarity ORS versus ReSoMal on mortality, treatment failure, time to full rehydration, and electrolyte disturbances (management review).

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Background: Effective methods of preventing and identifying childhood wasting are required to achieve global child health goals. Family mid-upper arm circumference (MUAC) programs train caregivers to screen their child for wasting with MUAC tapes. We assessed the effectiveness of a two-way short message service (SMS) platform (referred to as the Maternally Administered Malnutrition Monitoring System [MAMMS]) in western Kenya.

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We aimed to establish if enteric permeability was associated with similar biological processes in children recovering from hospitalization and relatively healthy children in the community. Extreme gradient boosted models predicting the lactulose-rhamnose ratio (LRR), a biomarker of enteric permeability, using 7,500 plasma proteins and 34 fecal biomarkers of enteric infection among 89 hospitalized and 60 community children aged 2-23 months were built. The R values were calculated in test sets.

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Interventions to reduce childhood stunting burden require clinical trials with a primary outcome of linear growth. When growth is measured longitudinally, there are several options for including baseline measurements in the analysis. This study compares the performance of several methods.

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The epidemiology of pediatric COVID-19 in sub-Saharan Africa and the role of fecal-oral transmission in SARS-CoV-2 are poorly understood. Among children and adolescents in Kenya, we identify correlates of COVID-19 infection, document the clinical outcomes of infection, and evaluate the prevalence and viability of SARS-CoV-2 in stool. We recruited a prospective cohort of hospitalized children aged two months to 15 years in western Kenya between March 1 and June 30 2021.

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Article Synopsis
  • The study found a high prevalence of ciprofloxacin non-susceptible E. coli and Klebsiella spp in children under five after hospital discharge, with around 68% of the isolates exhibiting resistance.
  • About 80% of resistant isolates carried plasmid-mediated quinolone resistance genes, with aac(6')lb-cr being the most common.
  • Factors such as ceftriaxone use during hospitalization and ESBL production were significantly linked to the presence of these resistant bacteria.
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Human subjects research protections have historically focused on mitigating risk of harm and promoting benefits for research participants. In many low-resource settings (LRS), complex and often severe challenges in daily living, poverty, geopolitical uprisings, sociopolitical, economic, and climate crises increase the burdens of even minimal risk research. While there has been important work to explore the scope of ethical responsibilities of researchers and research teams to respond to these wider challenges and hidden burdens in global health research, less attention has been given to the ethical dilemmas and risk experienced by frontline researcher staff as they perform research-related activities in LRS.

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Background: Poor maternal mental health during childhood hospitalization is associated with post-discharge child mortality. We aimed to establish if maternal PHQ-9 scores during hospitalization are associated with acute stressors or longer trends in mental health status.

Method: Mothers of children admitted to nine hospitals in six countries completed a PHQ-9 assessment during hospitalization and 45-days post-discharge.

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: Many acutely ill children in low- and middle-income settings have a high risk of mortality both during and after hospitalisation despite guideline-based care. Understanding the biological mechanisms underpinning mortality may suggest optimal pathways to target for interventions to further reduce mortality. The Childhood Acute Illness and Nutrition (CHAIN) Network ( www.

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Article Synopsis
  • The study aimed to investigate the link between gut permeability and growth/inflammation in hospitalized children from low- and middle-income countries.
  • It involved testing the gut permeability of young hospitalized children and comparing results to those of children from their communities, using various statistical models to analyze the data.
  • Although hospitalized children showed higher gut permeability, it did not correlate with significant changes in their growth after discharge, and differences in systemic inflammation indicators were noted between the two groups.
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Background: Current guidelines for the management of childhood wasting primarily focus on the provision of therapeutic foods and the treatment of medical complications. However, many children with wasting live in food-secure households, and multiple studies have demonstrated that the etiology of wasting is complex, including social, nutritional, and biological causes. We evaluated the contribution of household food insecurity, dietary diversity, and the consumption of specific food groups to the time to recovery from wasting after hospital discharge.

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Background: Children who have been discharged from hospital in sub-Saharan Africa remain at substantial risk of mortality in the post-discharge period. Antimicrobial resistance (AMR) may be an important factor. We sought to determine the prevalence and risk factors associated with AMR in commensal Escherichia coli (E.

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Objective: The purpose of this study was to assess the distribution of HIV-program staff and the extent to which their availability influences HIV programmatic and patient outcomes.

Methods: The study was a facility level cross-sectional survey. Data from October 2018 to September 2019 were abstracted from HIV program reports conducted in 18 districts of Côte d'Ivoire.

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