Publications by authors named "Khosa C"

Background: In 2021, there were approximately 450,000 cases of drug-resistant tuberculosis (DR-TB) worldwide. The treatment of DR-TB historically included expensive and toxic injectable drugs leading to adverse effects including ototoxicity and Electrocardiogram (ECG) abnormalities. This study described the perspectives of healthcare providers and people with DR-TB on the usability of simplified audiometry and ECG for monitoring treatment adverse effects.

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Objectives: Chest x-ray (CXR) plays an important role in childhood tuberculosis (TB) diagnosis, but access to quality CXR remains a major challenge in resource-limited settings. Digital CXR (d-CXR) can solve some image quality issues and facilitate their transfer for quality control. We assess the implementation of introducing d-CXR in 12 district hospitals (DHs) in 2021-2022 across Cambodia, Cameroon, Ivory Coast, Mozambique, Sierra Leone and Uganda as part of the TB-speed decentralisation study on childhood TB diagnosis.

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Article Synopsis
  • Chest X-ray (CXR) misinterpretation poses a significant challenge to accurately diagnosing tuberculosis (TB) in children, and implementing external quality assurance (EQA) can improve the skills of CXR readers.
  • In a study across six resource-limited countries, 60.8% of eligible CXRs were selected for re-reading under EQA, showing a decrease in discordant interpretations over time and a 100% sensitivity in clinician readings following EQA.
  • The primary challenges faced included the transfer of CXRs and the workload of re-readers, indicating that while EQA can enhance diagnosis, operational issues need to be addressed for success.
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  • Researchers looked into how to test kids under 15 for tuberculosis, a serious illness that can be missed in many children.
  • They studied data from five countries and included children who showed signs of the disease, while excluding very sick kids or those already on treatment.
  • Out of 975 kids tested, 25% were confirmed to have tuberculosis, 29% were thought to have it but not confirmed, and 46% were unlikely to have it.
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Background: As a result of shared social and structural risk factors, people in households affected by tuberculosis may have an increased risk of chronic conditions; at the same time, tuberculosis screening may be an opportunity for interventions. We sought to describe the prevalence of HIV, nutritional disorders, and noncommunicable diseases (NCDs) among members of tuberculosis-affected households in 3 African countries.

Methods And Findings: A part of a multicountry cohort study, we screened for tuberculosis, HIV, nutritional disorders (underweight, anaemia, overweight/obesity), and NCDs (diabetes, hypertension, and chronic lung disease) among members of tuberculosis-affected households aged ≥10 years in Mozambique, Tanzania, and Zimbabwe.

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Introduction: Tuberculosis (TB) is an important cause of morbidity and mortality among people living with HIV (PLHIV). Current WHO-recommended strategies for diagnosing TB among hospitalized PLHIV rely on symptom screening and disease severity to assess eligibility for urine lipoarabinomannan lateral flow (LF-LAM) and molecular testing. Despite these recommendations, autopsy studies show a large burden of undiagnosed TB among admitted PLHIV.

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Background: Chest X-ray (CXR) interpretation is challenging for the diagnosis of paediatric TB. We assessed the performance of a three half-day CXR training module for healthcare workers (HCWs) at low healthcare levels in six high TB incidence countries.

Methods: Within the TB-Speed Decentralization Study, we developed a three half-day training course to identify normal CXR, CXR of good quality and identify six TB-suggestive features.

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In 2020, it was estimated that there were 155 million survivors of TB alive, all at risk of possible post TB disability. The 2 International Post-Tuberculosis Symposium (Stellenbosch, South Africa) was held to increase global awareness and empower TB-affected communities to play an active role in driving the agenda. We aimed to update knowledge on post-TB life and illness, identify research priorities, build research collaborations and highlight the need to embed lung health outcomes in clinical TB trials and programmatic TB care services.

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Article Synopsis
  • The study examines the potential benefits of decentralizing childhood tuberculosis diagnosis to lower health system levels, aiming to improve case detection and reduce under-diagnosis.
  • It compares two strategies: one focused on district hospitals and another on primary health centers, against the standard of care across six countries.
  • The results indicate that while the district hospital approach may be more cost-effective in some settings, both strategies require significant budget increases for implementation, varying by country.
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  • Childhood tuberculosis (TB) is often underdiagnosed due to low awareness and limited access to necessary diagnostic tools in healthcare settings.
  • An operational research study in several African and Asian countries tested a comprehensive diagnostic approach by decentralizing TB diagnostics to district hospitals and primary health centers for children under 15 years old.
  • The intervention significantly increased TB detection rates, with diagnoses rising from 0.08% pre-intervention to 0.23% during the intervention, highlighting the effectiveness of decentralized health services.
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  • People with HIV (PWH) treated for tuberculosis (TB) may develop a condition called TB-associated immune reconstitution inflammatory syndrome (TB-IRIS) after starting antiretroviral therapy (ART), which includes integrase inhibitors like raltegravir and non-nucleoside reverse transcriptase inhibitors like efavirenz.
  • A study analyzed data from the Reflate TB 2 trial, which compared the occurrence of TB-IRIS in PWH receiving either raltegravir or efavirenz-based ART while undergoing standard TB treatment.
  • The results showed that the incidence of TB-IRIS was similar in both ART groups, with 48 participants developing TB-IRIS, and identified risk factors such as low CD4
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Tuberculosis is recognised as a disease of the economically disadvantaged people due to its association with financial vulnerability. Mozambique still faces the challenge of the high burden of TB and associated costs. We aimed to understand the social and economic impacts of TB and the need for social support among people with TB in Mozambique.

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Background: In 2020, the WHO-approved Molbio Truenat platform and MTB assays to detect Mycobacterium tuberculosis complex (MTB) and resistance to rifampicin directly on sputum specimens. This primary health care center-based trial in Mozambique and Tanzania investigates the effect of Truenat platform/MTB assays (intervention arm) combined with rapid communication of results compared to standard of care on TB diagnosis and treatment initiation for microbiologically confirmed TB at 7 days from enrolment.

Methods: The Tuberculosis Close the Gap, Increase Access, and Provide Adequate Therapy (TB-CAPT) CORE trial employs a pragmatic cluster randomized controlled design to evaluate the impact of a streamlined strategy for delivery of Truenat platform/MTB assays testing at primary health centers.

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Introduction: Abortion law reforms have been hypothesized to influence reproductive, maternal, and neonatal health services and health outcomes, as well as social inequalities in health. In 2014, Mozambique legalized abortion in specific circumstances. However, due to challenges implementing the law, there is concern that it may have negatively influenced neonatal outcomes.

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Article Synopsis
  • Childhood tuberculosis is a significant health issue due to difficulties in diagnosing the disease, and there's a need for improved diagnostic tests using easily obtained samples.
  • The study evaluated the diagnostic accuracy of the Cepheid MTB-HR test in detecting tuberculosis in children under 15 years across multiple sites in Africa and India, analyzing results against established medical standards.
  • Although the MTB-HR test showed high specificity (90.3%), its sensitivity was modest, indicating limitations in identifying the disease, especially among children with HIV.
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Spirometry is considered relevant for the diagnosis and monitoring of post-TB lung disease. However, spirometry is rarely done in newly diagnosed TB patients. Newly diagnosed, microbiologically confirmed TB patients were recruited for the study.

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Article Synopsis
  • * A study in various African countries assessed healthcare workers' experiences with a comprehensive tuberculosis diagnosis package, highlighting that while systematic screening increased awareness, it also increased their workload.
  • * Healthcare workers generally felt confident with certain diagnostic procedures like nasopharyngeal aspirations and molecular testing, but expressed concerns about logistical issues, cultural barriers for stool collection, and the need for ongoing training to improve self-efficacy in clinical evaluations.
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Objective: People with tuberculosis (TB) and their households face severe socioeconomic consequences, which will only be mitigated by intersectoral collaboration, especially between the health and social sectors. Evidence suggests that key factors for successful collaboration include shared goals, trust, commitment, resource allocation, efficient processes and effective communication and motivation among collaborating parties. This study aimed to understand healthcare and social support sector policymakers' perspectives on potential solutions to mitigate financial impact among people with TB and their households in Mozambique.

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The mycobacteriological analysis of sputum samples is the gold standard for tuberculosis diagnosis and treatment monitoring. However, sputum production can be challenging after the initiation of TB treatment. As a possible alternative, we therefore investigated the dynamics of neutrophil-derived soluble inflammatory mediators during TB treatment in relation to HIV ART status and the severity of lung impairment.

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Article Synopsis
  • A study was conducted to compare the effectiveness of antiretroviral therapy (ART) for people with HIV who were also being treated for tuberculosis across four countries involved in two clinical trials.
  • The analysis included 550 participants from Brazil, Côte d'Ivoire, Mozambique, and Vietnam, finding that 65.8% achieved virologic success, with higher rates in Brazil (75.0%) compared to Côte d'Ivoire (58.2%).
  • Results indicated that the initial level of HIV-1 RNA was the main factor influencing treatment success, rather than the country of treatment.
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  • An estimated 1.2 million children develop tuberculosis (TB) annually, with 240,000 dying due to missed diagnoses, prompting the need for improved diagnostic tools.
  • The RaPaed-TB study aimed to evaluate the diagnostic accuracy of various TB tests by recruiting 1,000 children under 15 years from five countries and conducting thorough assessments, including symptom checks, radiography, and various sampling methods.
  • This large-scale study employs a complex methodology to determine the effectiveness of new testing strategies for enhancing TB detection in vulnerable pediatric populations, potentially leading to better healthcare outcomes.
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  • In the Reflate TB2 trial, researchers studied factors linked to virologic success and adherence in people with HIV and tuberculosis receiving raltegravir or efavirenz treatment.
  • Out of 444 participants, 65% achieved virologic success (HIV-1 RNA <50 copies/mL) and maintained adherence (≥95% pill count) over 48 weeks, with several factors influencing these outcomes.
  • Key findings indicated that female sex, lower baseline HIV-1 RNA levels, and optimal adherence were associated with virologic success, while a higher antiretroviral pill burden negatively impacted adherence.
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Background: Tuberculosis diagnosis might be delayed or missed in children with severe pneumonia because this diagnosis is usually only considered in cases of prolonged symptoms or antibiotic failure. Systematic tuberculosis detection at hospital admission could increase case detection and reduce mortality.

Methods: We did a stepped-wedge cluster-randomised trial in 16 hospitals from six countries (Cambodia, Cameroon, Côte d'Ivoire, Mozambique, Uganda, and Zambia) with high incidence of tuberculosis.

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Background: Tuberculosis (TB) is a difficult-to-treat disease requiring the combination of four antibiotics for a minimum of 6 months. Rapid and quantitative biomarkers to monitor treatment response are urgently needed for individual patient management and clinical trials. C-reactive protein (CRP) is often used clinically as a rapid marker of inflammation caused by infection.

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