Publications by authors named "Castelnuovo B"

Differentiated service delivery (DSD) models in resource-limited settings have reduced strain on health services and improved client experience, retention and viral suppression, but little is known about the impact of HIV DSD models on quality of life (QoL), which is essential for optimizing person-centered care. This study assessed the impact of DSD models on QoL, loss to follow-up (LTFU), and mortality among persons living with HIV (PLHIV) on ART over time at a large urban HIV clinic in Uganda. We analyzed records of 1,000 PLHIV who had been on ART for 10 years and followed up for eight years, starting in 2014 or 2015 at the Infectious Diseases Institute clinic in Kampala, Uganda.

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Introduction: Tuberculosis (TB) is the leading infectious cause of death globally. Despite WHO recommendations for TB preventive therapy (TPT), challenges persist, including incompletion of treatment and adverse drug reactions (ADRs). There is limited data on the 3-month isoniazid and rifapentine (3HP) pharmacokinetics, pharmacogenomics and their relation with ADRs.

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Article Synopsis
  • Older people living with HIV in sub-Saharan Africa, particularly women, face a high prevalence of geriatric syndromes, with a study in Kampala, Uganda, finding that 94.4% of participants aged 60 and older had at least one syndrome.
  • Women demonstrated significantly higher rates of frailty, cognitive impairment, and falls compared to men, revealing important sex differences in health outcomes.
  • Factors such as older age, low education, being underweight, advanced HIV stages, and having multiple non-communicable diseases were associated with a greater number of geriatric syndromes, highlighting the need for targeted healthcare strategies for this population.
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Introduction: Chronic kidney disease (CKD) is often complicated by disorders in multiple body systems, associated with higher mortality and morbidity. Young people living with HIV (YPLHIV) have an increased risk of multisystem chronic comorbidities. However, there are few data describing comorbidities associated with CKD among YPLHIV.

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Article Synopsis
  • * The cross-sectional study involved 500 participants aged 10-24, with assessments of kidney function through urine and blood samples, showing that CKD prevalence ranged from 0 to 23%, depending on the assessment methods used.
  • * Key findings indicated that factors like age and male sex were significantly associated with CKD, highlighting the need for improved early diagnosis and monitoring strategies for YPLHIV.
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  • P. falciparum is a major health concern, particularly in sub-Saharan Africa, contributing to 99% of malaria infections, with symptoms ranging from asymptomatic to severe based on various factors like host immunity and genetic diversity.
  • A study conducted on 225 malaria patients in Uganda utilized seven microsatellite markers to analyze the genetic diversity and multiplicity of infection (MOI) in P. falciparum infections among asymptomatic and symptomatic individuals.
  • Results showed high genetic diversity in both groups, with no significant difference in MOI, indicating a prevalence of polyclonal infections, and notable linkage disequilibrium between different infection types, while genetic differentiation among parasite populations was low.
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  • * A systematic review and meta-analysis were conducted, evaluating 15 studies that reported CKD prevalence, with findings showing a pooled prevalence of 12% but a wide variation among the studies (from 0.8% to 53.1%).
  • * The analysis provided insights into the quality of the included studies and confirmed the robustness of the findings, showing no publication bias and identifying a significant degree of variability in CKD estimates.
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Pharmacokinetic studies are important for understanding drug disposition in the human body. However, pregnant and lactating women are often excluded from primary pharmacokinetic studies and as such there is often limited dosing information regarding drug use in pregnant and/or lactating women. The objectives of this interim analysis were to define the transfer of rifampicin to a breastfed infant and to determine the area under the concentration-time curve of rifampicin in maternal plasma, breastmilk and infant plasma.

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Background: People living with HIV (PLWH) are at risk of kidney function impairment due to HIV-related inflammation, antiretroviral therapy (ART), diabetes mellitus, and hypertension. Older persons may experience a higher burden of chronic kidney disease (CKD) as kidney function declines with increasing age. There is a paucity of data comparing the prevalence of kidney function impairment in older PLWH to that in people without HIV in sub-Saharan Africa.

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Introduction: Young people living with HIV (YPLHIV) are at increased risk of developing chronic kidney disease (CKD) which is associated with high mortality and morbidity. Early diagnosis is important to halt progression. We aimed to estimate the prevalence and factors associated with CKD among YPLHIV in Kampala, Uganda, and to compare serum creatinine and cystatin C for early diagnosis of CKD in this population.

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Objectives: The main aim was to determine the diagnostic performance of an albuminuria point-of-care test (POC) for diagnosis of chronic kidney disease among young people living with HIV (YPLHIV) in Uganda.

Design: We conducted a cross-sectional study comparing the diagnostic performance of MicroalbuPHAN (Erba Lachema, Czech Republic), an albuminuria POC test against the laboratory-measured albumin and creatinine as the reference standard.

Setting: The study was set in seven HIV clinics in Kampala, Uganda that provide antiretroviral therapy to adults and children living with HIV.

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Introduction: The presence of hypertension could reduce the health-related quality of life (HRQoL) of people with HIV (PWH). Yet, literature describing the HRQoL of PWH who have hypertension in Uganda is scarce making the design of locally adapted interventions cumbersome. In our study, we compared HRQoL scores of people with HIV with and without hypertension on long term antiretroviral therapy (ART) in Uganda.

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Article Synopsis
  • The study aimed to investigate blood glucose outcomes in people with HIV (PWH) who have pre-diabetes and are starting treatment with dolutegravir compared to those with normal glucose levels.
  • Researchers conducted a matched cohort study with 44 PWH with pre-diabetes and 88 with normal glucose, measuring changes in fasting and 2-hour blood glucose levels at various points over 48 weeks.
  • Results showed that while those with normal glucose experienced an increase in fasting blood glucose, those with pre-diabetes saw a significant decrease, indicating improvement in glucose metrics, questioning the need for intensive glucose monitoring in the initial months of dolutegravir treatment.
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Background: Globally, more than half of women take medicines whilst breastfeeding. Data concerning the exposure of the breastfed infant to drugs and any related risks are sparce. Lactation studies are only rarely performed close to licensing for medicines anticipated to be widely used in women of childbearing age.

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BACKGROUNDEngaging private health providers and community healthcare workers (CHWs) in the provision of TB care services can increase TB case notification and limit community transmission. We determined whether private pharmacy and community engagement could affect access to TB diagnostic and treatment services in Uganda.METHODSWe conducted a cross-sectional study on patients diagnosed with TB through three different pathways; by private pharmacies, CHWs, and public health facilities.

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Background: The HIV care cascade is a framework to examine effectiveness of HIV programs and progress toward global targets to end the epidemic but has been conceptualized as a unidirectional process that ignores cyclical care patterns. We present a dynamic cascade that accounts for patient "churn" and apply novel analytic techniques to readily available clinical data to robustly estimate program outcomes and efficiently assess progress toward global targets.

Methods: Data were assessed for 35,649 people living with HIV and receiving care at 78 clinics in East Africa between 2014 and 2020.

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Background: HIV-associated alterations innate and adaptive immune cell compartments are reminiscent of the process of immune aging.

Objectives: We described immune aging phenotypes among ART-treated HIV-infected adults relative to age-matched HIV-negative counterparts.

Methods: In a cross-sectional comparative study of HIV-infected adults with CD4≥500 cells/μl after at least 12 years of suppressive ART and age-and-gender-matched HIV-negative individuals, immune activation and immune aging phenotypes were measured, using multi-color flowcytometry.

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Everybody deserves access to evidence-based information to make decisions about their health. However, in many situations, clinical trial eligibility criteria mean that specific data do not exist for certain groups of individuals. These include pregnant and breastfeeding women, children, older people, those with hepatic and renal dysfunction, those with acute severe illness, and those with multiple co-morbidities and interacting medications.

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Introduction: Tuberculosis (TB) is the leading infectious cause of death globally. Despite WHO recommendations for Tuberculosis Preventive Therapy (TPT), challenges persist, including incompletion of treatment and adverse drug reactions (ADRs). There is limited data on the 3-month isoniazid and rifapentine (3HP) pharmacokinetics, pharmacogenomics and their relation with ADRs.

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Background: People living with HIV (PLWH) are at risk of kidney function impairment due to HIV-related inflammation, antiretroviral therapy (ART), diabetes mellitus, and hypertension. Older persons may experience a higher burden of chronic kidney disease (CKD) as kidney function declines with increasing age. There is a paucity of data comparing the prevalence of kidney function impairment in older PLWH to that in HIV-uninfected people in sub-Saharan Africa.

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Background: Dolutegravir (DTG)-based antiretroviral therapy (ART) is currently the preferred first-line treatment for persons living with HIV (PLHIV) including children and adolescents in many low- and middle-income countries including Uganda. However, there are concerns about excessive weight gain associated with DTG especially in adults. There remains paucity of current information on weight-related outcomes among adolescents on DTG.

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Background: In sub-Saharan Africa (SSA), Plasmodium falciparum causes most of the malaria cases. Despite its crucial roles in disease severity and drug resistance, comprehensive data on Plasmodium falciparum genetic diversity and multiplicity of infection (MOI) are sparse in SSA. This study summarizes available information on genetic diversity and MOI, focusing on key markers (msp-1, msp-2, glurp, and microsatellites).

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Objective: Older people living with HIV (OPWH) often have lower quality of life (QoL) compared to general population. Measuring their QoL is an important step in HIV care to ensure they have long healthy lives. This study aimed to evaluate the quality of life and its associated factors among people living with HIV aged 60 years and above in Uganda.

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Citizens juries (CJ) are a method of deliberative action research that have been utilized in countries with well-funded health care systems to address questions about access to health data. Uganda is classified as a low-income country and utilizes a predominantly paper-based health record system. The burgeoning electronic health record in the central area represents an opportunity to collect and analyze longitudinal data on patients living with long term HIV infection and multiple diseases, a hitherto unexplored disease mapping exercise We set out to understand the public perception towards the use of data for research purposes such as this among Ugandans utilizing an adapted strategy sensitive to the local culture.

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We explored the barriers and facilitators to viral load (VL) suppression after three or more intensive adherence counseling (IAC) sessions among adolescents and adults living with human immunodeficiency virus (HIV) on a first-line anti-retroviral therapy (ART) with initially unsuppressed VL in Kampala, Uganda. Using a qualitative study, data were collected through in-depth interviews with people living with HIV (PLHIV) with unsuppressed and suppressed VL and caregivers of younger adolescents living with HIV after three or more IAC sessions. We held key informant interviews with health workers involved in IAC implementation, namely ART/HIV focal persons, IAC Team Leaders, and linkage facilitators.

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