Publications by authors named "Tom Heller"

Background: CNS infections cause approximately a third of HIV-related deaths. The Driving Reduced AIDS-Associated Meningo-encephalitis Mortality DREAMM study aimed to prospectively diagnose the aetiology of HIV-related CNS infection in five public hospitals in Cameroon, Malawi, and Tanzania.

Methods: DREAMM was a multicentre, hybrid type-2 implementation science project.

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Kaposi sarcoma-associated herpes virus (KSHV), also known as human herpes virus 8 (HHV-8), is the primary etiologic cause of Kaposi sarcoma (KS) and KSHV Inflammatory Cytokine Syndrome (KICS). Patients with KICS demonstrate symptoms of systemic inflammation, high KSHV viral load, elevation of inflammatory markers, and increased mortality. Management requires rapid diagnosis, treatment of underlying HIV, direct treatment of KS, and addressing the hyperimmune response.

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Background/objectives: Kaposi sarcoma (KS) is a common lymphatic endothelial cancer among children with and without HIV in central and eastern Africa. Despite its clinical heterogeneity, its various clinical phenotypes are often grouped together in staging and treatment algorithms. Patients with KS tumor-associated edema, referring to hard, non-pitting lesions which often lead to chronic disability, represent a unique, understudied subgroup of children with KS.

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Article Synopsis
  • - Syphilis is a sexually transmitted infection that progresses through different stages, and if left undiagnosed, can lead to serious health issues, including tertiary syphilis which causes unusual lesions called gummas.
  • - In a rare case involving an HIV patient, liver involvement was observed during primary syphilis, marked by elevated liver enzymes.
  • - Gummatous syphilis is not commonly reported, so healthcare providers should be aware of it as a possible diagnosis for patients showing positive syphilis tests and liver issues.
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Miliary tuberculosis is a form of disseminated tuberculosis that can be difficult to detect when the classic pattern is absent on chest radiograph and advanced cross-sectional imaging is not readily available. While the focused assessment with sonography for HIV-associated tuberculosis (FASH) protocol for extrapulmonary tuberculosis emphasizes easy-to-teach findings, experienced sonographers may detect additional, subtler signs that can aid in diagnosis. We report a case of a 20-year-old man with miliary tuberculosis diagnosed on computed tomography of the chest.

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Background: Chronic Hepatitis B (CHB) is prevalent worldwide and most related deaths occur in low-resource settings. Antiviral treatment of CHB is indicated in those with significant liver disease and markers of viral replication. However, recommended diagnostics such as elastography (a non-invasive imaging measure of fibrosis/cirrhosis) or HBV viral load are often lacking in these settings, which creates barriers to treatment.

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Article Synopsis
  • Millions of Africans on dolutegravir-based ART are facing challenges with dolutegravir resistance, as detailed clinical management is lacking.
  • A review of HIV drug resistance data shows that out of 89 cases, 24 exhibited dolutegravir resistance mutations, with older age and high NRTI resistance linked to this resistance.
  • Despite a high mortality rate post-treatment modification, most individuals who remained in the program achieved good viral load outcomes; further research on managing dolutegravir resistance in treatment-experienced patients is necessary.
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Point-of-care ultrasound (POCUS) to diagnose tuberculosis (TB) was assessed in 131 children under 5 years old hospitalized with severe acute malnutrition. Of these, 23% had confirmed or unconfirmed TB and 5% were HIV-infected. There were no POCUS findings associated with TB diagnosis.

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Article Synopsis
  • The FASH protocol has been used for over a decade to help diagnose extra-pulmonary tuberculosis in HIV-infected patients, but interpreting its results can be difficult due to overlapping features with other diseases.
  • A review analyzed ten studies on the FASH protocol's accuracy, revealing sensitivity and specificity rates for enlarged lymph nodes and spleen lesions that suggest it can effectively indicate tuberculosis but also requires careful consideration of other potential diagnoses.
  • The review recommends basic ultrasound training in the FASH protocol and ultrasound-guided diagnostic sampling to improve diagnosis, acknowledging that current evidence is limited and more research is needed.
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Article Synopsis
  • The DREAMM project aimed to reduce deaths from HIV-related central nervous system (CNS) infections in three African countries through improved diagnostic and treatment strategies.
  • It implemented a stepwise intervention including rapid testing and adherence to WHO guidelines while enhancing hospital care via education and systemic improvements.
  • By comparing 2-week mortality rates across phases, the project enrolled 501 participants between 2016 and 2021 and focused on those with advanced HIV, highlighting the need for effective management in HIV-related CNS conditions.
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Kaposi sarcoma (KS) is the most common cancer in people living with HIV (PLWH) in many countries where KS-associated herpesvirus is endemic. Treatment has changed little in 20 years, but the disease presentation has. This prospective cohort study enrolled 122 human immunodeficiency virus (HIV) positive KS patients between 2017 and 2019 in Malawi.

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Background: Sub-Saharan Africa is one of the regions in the world with the highest numbers of uncontrolled hypertension as well as people living with HIV/AIDS (PLHIV). However, the association between hypertension and antiretroviral therapy is controversial.

Methods: Participant demographics, medical history, laboratory values, WHO clinical stage, current medication, and anthropometric data were recorded at study entry and during study visits at 1, 3, 6 months, and every 6 months thereafter until month 36.

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Background: Focused Assessment with Sonography for HIV-associated TB (FASH) is a diagnostic tool for extra-pulmonary tuberculosis (TB) in symptomatic patients with advanced HIV. As Kaposi's sarcoma (KS) is also prevalent in this patient population, changes due to KS may mimic TB findings and clinical interpretation of target FASH findings can be challenging. We aimed to describe sonographic findings in patients with KS.

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Article Synopsis
  • * Portable ultrasound devices and specific protocols like FASH for HIV-related TB are helping improve diagnostic accuracy in these settings.
  • * A case study of bacillary angiomatosis in an advanced HIV patient highlights the effectiveness of combining clinical skills with ultrasound and biopsy for accurate diagnosis and treatment.
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Background: The spleen is frequently scanned in workup of infections. Hypoechoic splenic micro-abscesses are known signs of disseminated tuberculosis in HIV co-infected patients. The spleen of HIV patients is thus often scanned using high-frequency transducers.

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Dolutegravir HIV drug resistance (HIVDR) data from Africa remain sparse. We reviewed HIVDR results of Malawians on dolutegravir-based antiretroviral therapy (November 2020-September 2021). Of 6462 eligible clients, 33 samples were submitted to South Africa, 27 were sequenced successfully, and 8 (30%) had dolutegravir HIVDR.

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Setting: 100 bed medical ward in referral hospital, Lilongwe, Malawi.

Objective: HIV positive patients admitted to hospital often have advanced HIV disease (AHD) and are at risk for mortality. WHO guidelines suggest a package of care for AHD; these are often not implemented, especially in inpatient settings.

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Background: In resource-limited settings, many HIV-infected patients with advanced HIV-related disease need specialized care not represented in guidelines. Training opportunities for healthcare providers on advanced HIV care are limited. The aim of this study was to evaluate the educational content and acceptability of mobile instant messaging (MIM) as a training and telemedicine tool for HIV care providers in Malawi.

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Background: Visceral leishmaniasis (VL) is predominantly a neglected tropical parasitic disease but may also be acquired by travellers. We aimed at summarizing knowledge on sonographic presentation of VL to better understand sonographic features of VL.

Methods: PubMed was searched for studies and case reports presenting original data on sonographic findings of VL, published before August 13th, 2019.

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Introduction: Point-of-care (POC) technologies in resource-limited settings can circumvent challenges of centralized laboratory testing, improving clinical management. However, higher device costs and uncertain indications for use have inhibited scaling up POC modalities. To address this gap, we investigated the feasibility and cost of targeted near-POC viral load (VL) testing in 2 large HIV clinics in Lilongwe, Malawi.

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Melioidosis is endemic in many rural areas in Southeast Asia where facilities for culture and identification of are often limited. We performed a prospective observational study in patients presenting with fever to Mahosot Hospital, the primary referral hospital in Laos, to establish whether the detection of abscesses on ultrasound could support a presumptive diagnosis of melioidosis. All patients underwent ultrasound examination to detect abscesses in the liver, spleen, prostate, or, if indicated, subcutaneous tissue.

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