Improving survival with tuberculosis & HIV treatment integration: A mini-review

The impact of delay in HIV diagnosis on patient survival: analysis of HIV infection trends from 2007 to 2023

BACKGROUND AND PURPOSE

HIV disease is one of the major public health challenges and its early diagnosis and timely management play a vital role in reducing mortality. This study examines factors affecting the mortality of HIV patients and the effect of delay in diagnosis on survival.

METHODS

In this retrospective cohort study, data from the ART Center of Koppal District Hospital, India, from April 2007 to August 2023 were used. Of the 11,799 patients, 8,092 with complete data were included in the final analysis. Demographic and clinical variables including age, gender, HIV status, treatment, laboratory parameters, TB infection and survival were investigated. Delayed diagnosis was defined as CD4 ≤ 350. Statistical analyzes were performed with Cox regression and survival curves (Kaplan-Meier).

RESULTS

Out of 8092 patients, 5897 (72.8%) had delayed diagnosis. The average survival time for patients with delay was 61.55 months and without delay was 84.09 months. Delay in diagnosis increases the risk of death with HR 3.01 (95% CI: 2.67-3.40) in univariate analysis and HR 1.70 (95% CI: 1.48-1.96) in multivariate analysis. TS/TG patients had a higher risk of death than women with a HR of 1.64 (95% CI: 1.52-1.78) and patients over 45 with a HR of 2.17 (95% CI: 1.94-2.43) compared to those under 30. AIDS stage patients had a higher risk of death with HR 2.54 (95% CI: 2.34-2.75) and TB patients with HR 1.43 (95% CI: 1.31-1.56).

CONCLUSION

delay in diagnosis, age, disease stage and the presence of TB are important factors of mortality in patients with HIV. Early diagnosis and timely management of the disease can reduce the risk of death and increase the life expectancy of patients. Programs to increase awareness and access to diagnostic and treatment services should be strengthened.

Innovations in TB Screening and Preventive Therapy Services for PLHIV in Yogyakarta City, Indonesia

Tuberculosis preventive therapy (TPT) for people living with HIV (PLHIV) has been recommended by Indonesia's National TB Program since 2014 but has seen limited implementation. This study describes TB screening and TPT initiation from 2019 to 2022 among eight healthcare facilities supported by the Zero TB Yogyakarta (ZTB) project. ZTB assigned a dedicated nurse to assist with active TB screening among PLHIV and recommended the immediate initiation of TPT as an innovation implemented. Data were obtained from the national HIV program reporting system, routinely reported by ART clinics from 2019 to 2022. We conducted a descriptive analysis, comparing the pre-intervention and intervention periods. During the intervention, there was a significant increase in PLHIV visits to healthcare facilities where TPT eligibility was assessed. At health centers, TB screening coverage for PLHIV decreased toward the end of the baseline period but recovered during the intervention. The number of PLHIV starting TPT also rose during the intervention. While the direct impact of ZTB is difficult to measure, the changes observed indicate progress in integrating TB/HIV services and enhancing TB prevention among PLHIV. Ongoing support, training, and supervision of healthcare facilities are crucial for improving TB screening and TPT provision.

Treatment response of patients with tuberculosis and HIV co-infection: a retrospective analysis of secondary data from Shanghai, China, 2010-2020

Background

At present, there is a need for more substantial real-world evidence on the factors influencing the effectiveness of tuberculosis (TB) treatment in HIV/TB co-infected patients.

Objectives

This retrospective study aims to identify factors affecting TB treatment effectiveness in HIV/TB co-infected patients.

Design

Retrospective cross-sectional study.

Methods

We included 461 HIV/TB co-infected patients, deriving 742 samples based on each initial positive TB test period. A total of 7788 valid treatment records corresponding to 17 TB drug compositions and 150 clinical indicators (each > 100 records) were used for analysis. Data mining techniques were employed, including consensus clustering, Fisher's exact test, stratified analysis, multivariate logistic regression analysis, and three modeling approaches (logistic regression, support vector machine, and random forest).

Results

The TB treatment effectiveness of CD4+ T cell count ⩽ 42 is significantly lower than that of the sample group > 42 (aOR: 1.77, 95% CI: 1.15-2.74, p = 0.010). The TB treatment effectiveness of the "rifabutin and levofloxacin alone or in combination" group is significantly higher than that of the "other first- and second-line anti-TB drugs in combination" group (aOR: 0.10, 95% CI: 0.01-0.64, p = 0.022). Significant differences exist in factors between TB treatment effective and ineffective groups, including age (aOR: 2.12, 95% CI: 1.10-4.20, p = 0.027), pre-treatment high-density lipoprotein (HDL) cholesterol (aOR: 0.47, 95% CI: 0.25-0.89, p = 0.022), pre-treatment CD8+ T cell count (aOR: 0.55, 95% CI: 0.33-0.90, p = 0.019), pre-treatment neutrophil percentage (aOR: 0.68, 95% CI: 0.48-0.96, p = 0.030), rifabutin (aOR: 1.59, 95% CI: 1.09-2.32, p = 0.016), and cycloserine (aOR: 0.21, 95% CI: 0.03-0.77, p = 0.041). The best area under the receiver operating characteristic curve of the test set under three modeling methods is 0.560-0.763. Rate of lymphocyte percentage recovering to normal is significantly higher in the TB treatment-effective group than in the treatment-ineffective group (aOR: 1.83, 95% CI: 1.09-3.10, p = 0.022).

Conclusion

CD4+ T cell count of 42/μL assists TB treatment effectiveness evaluation. Rifabutin and levofloxacin show more therapeutic benefits. Lymphocyte percentage can serve as an effective TB therapeutic and diagnostic target. Age, pre-treatment factors (HDL cholesterol, CD8+ T cell count, and neutrophil percentage), rifabutin, and cycloserine are significantly associated with TB treatment effectiveness. Factors affecting TB treatment effectiveness for HIV/TB co-infected patients need more evidence.

The Proviral Reservoirs of Human Immunodeficiency Virus (HIV) Infection

Human Immunodeficiency Virus (HIV) proviral reservoirs are cells that harbor integrated HIV proviral DNA within their nuclear genomes. These cells form a heterogeneous group, represented by peripheral blood mononuclear cells (PBMCs), tissue-resident lymphoid and monocytic cells, and glial cells of the central nervous system. The importance of studying the properties of proviral reservoirs is connected with the inaccessibility of integrated HIV proviral DNA for modern anti-retroviral therapies (ARTs) that block virus reproduction. If treatment is not effective enough or is interrupted, the proviral reservoir can reactivate. Early initiation of ART improves the prognosis of the course of HIV infection, which is explained by the reduction in the proviral reservoir pool observed in the early stages of the disease. Different HIV subtypes present differences in the number of latent reservoirs, as determined by structural and functional differences. Unique signatures of patients with HIV, such as elite controllers, have control over viral replication and can be said to have achieved a functional cure for HIV infection. Uncovering the causes of this phenomenon will bring humanity closer to curing HIV infection, potential approaches to which include stem cell transplantation, clustered regularly interspaced short palindromic repeats (CRISPR)/cas9, "Shock and kill", "Block and lock", and the application of broad-spectrum neutralizing antibodies (bNAbs).

Advancing Diagnosis and Treatment in People Living with HIV and Tuberculosis Meningitis

PURPOSE OF REVIEW

Tuberculous meningitis (TBM) is the most severe form of tuberculosis. Inadequate diagnostic testing and treatment regimens adapted from pulmonary tuberculosis without consideration of the unique nature of TBM are among the potential drivers. This review focuses on the progress being made in relation to both diagnosis and treatment of TBM, emphasizing promising future directions.

RECENT FINDINGS

The molecular assay GeneXpert MTB/Rif Ultra has improved sensitivity but has inadequate negative predictive value to "rule-out" TBM. Evaluations of tests focused on the host response and bacterial components are ongoing. Clinical trials are in progress to explore the roles of rifampin, fluoroquinolones, linezolid, and adjunctive aspirin. Though diagnosis has improved, novel modalities are being explored to improve the rapid diagnosis of TBM. Multiple ongoing clinical trials may change current therapies for TBM in the near future.

Clinical Characteristics Associated with Poor Prognosis of Acquired Immunodeficiency Syndrome Patients Complicated with Disseminated Talaromycosis marneffei

Purpose

To analyze the clinical characteristics of AIDS with dTSM, especially in patients with poor prognosis.

Patients and Methods

One hundred and seventy AIDS patients were enrolled in this single-center retrospective study. The epidemiological characteristics, clinical manifestations, laboratory tests, imaging examination, and treatment outcome were collected. Logistic regression analysis was used to estimate the risk of mortality in AIDS patients with dTSM. The predictive value was evaluated using the receiver operating characteristic (ROC) curve.

Results

From 2015 to 2022, the incidence of AIDS with dTSM in the Wenzhou region increased yearly, mainly in young adults. The mortality rate was 16.47%. The most common clinical manifestations were lymph-node enlargement (92.35%) and fever (78.24%). Multivariate logistic regression analysis showed that procalcitonin (PCT), blood urea nitrogen (BUN), shock, and antiretroviral therapy (ART) were the risk factors for poor outcomes. The model comprised four risk factors and showed an excellent prediction performance, with an AUC of 0.987 in the training cohort (95% CI: 0.946-0.999) and 0.976 in the validation cohort (95% CI: 0.887-0.999).

Conclusion

This study suggested that PCT, BUN, shock, and ART were associated with the prognosis and outcome of AIDS with dTSM and had a specific predictive value.

Adherence measured using electronic dose monitoring is associated with emergent antiretroviral resistance and poor outcomes in patients co-infected with HIV/AIDS and multidrug-resistant tuberculosis

BACKGROUND

Medication adherence is known to challenge treatment of HIV/AIDS and multidrug-resistant tuberculosis (MDR-TB). We hypothesized that electronic dose adherence monitoring (EDM) would identify an ART adherence threshold for emergent ART resistance and predict treatment outcomes in patients with MDR-TB and HIV on ART and bedaquiline-containing TB regimens.

METHODS

A prospective cohort of adults with MDR-TB and HIV, on ART and initiating MDR-TB treatment with bedaquiline, were enrolled at a public TB referral hospital in KwaZulu-Natal, South Africa (PRAXIS Study, Clinicaltrials.gov NCT03162107). Participants received separate EDM devices measuring adherence to bedaquiline and ART (nevirapine or lopinavir/ritonavir). Adherence was calculated cumulatively over six months. Participants were followed through completion of MDR-TB treatment. HIV genome sequencing was performed at baseline, 2 and 6 months on samples with HIV RNA ≥1000 copies/mL.

FINDINGS

From November 2016 through February 2018, 198 MDR-TB and HIV co-infected participants were enrolled and followed (median 17.2 months, IQR 12.2 - 19.6). Eleven percent had baseline ART resistance mutations, and 7.5% developed emergent ART resistance at 6 months. ART adherence was independently associated with both emergent ART resistance and mortality. Modeling identified a significant (p<0.001), but linear association between ART adherence and emergent resistance, suggesting a strong association without a specific threshold.

INTERPRETATION

Our findings highlight the need for ART resistance testing, especially in MDR-TB HIV co-infected patients, which is currently not standard of care in resource-limited settings. Despite short follow-up duration, reduced ART adherence was significantly associated with emergent resistance and increased mortality.

Mortality in HIV and tuberculosis patients following implementation of integrated HIV-TB treatment: Results from an open-label cluster-randomized trial

BACKGROUND

HIV-TB treatment integration reduces mortality. Operational implementation of integrated services is challenging. This study assessed the impact of quality improvement (QI) for HIV-TB integration on mortality within primary healthcare (PHC) clinics in South Africa.

METHODS

An open-label cluster randomized controlled study was conducted between 2016 and 2018 in 40 rural clinics in South Africa. The study statistician randomized PHC nurse-supervisors 1:1 into 16 clusters (eight nurse-supervisors supporting 20 clinics per arm) to receive QI, supported HIV-TB integration intervention or standard of care (control). Nurse supervisors and clinics under their supervision, based in the study health districts were eligible for inclusion in this study. Nurse supervisors were excluded if their clinics were managed by municipal health (different resource allocation), did not offer co-located antiretroviral therapy (ART) and TB services, services were performed by a single nurse, did not receive non-governmental organisation (NGO) support, patient data was not available for > 50% of attendees. The analysis population consists of all patients newly diagnosed with (i) both TB and HIV (ii) HIV only (among patients previously treated for TB or those who never had TB before) and (iii) TB only (among patients already diagnosed with HIV or those who were never diagnosed with HIV) after QI implementation in the intervention arm, or enrolment in the control arm. Mortality rates was assessed 12 months post enrolment, using unpaired t-tests and cox-proportional hazards model. (Clinicaltrials.gov, NCT02654613, registered 01 June 2015, trial closed).

FINDINGS

Overall, 21 379 participants were enrolled between December 2016 and December 2018 in intervention and control arm clinics: 1329 and 841 HIV-TB co-infected (10·2%); 10 799 and 6 611 people living with Human Immunodeficiency Virus (HIV)/ acquired immunodeficiency syndrome (AIDS) (PLWHA) only (81·4%); 1 131 and 668 patients with TB only (8·4%), respectively. Average cluster sizes were 1657 (range 170-5782) and 1015 (range 33-2027) in intervention and control arms. By 12 months, 6529 (68·7%) and 4074 (70·4%) were alive and in care, 568 (6·0%) and 321 (5·6%) had completed TB treatment, 1078 (11·3%) and 694 (12·0%) were lost to follow-up, with 245 and 156 deaths occurring in intervention and control arms, respectively. Mortality rates overall [95% confidence interval (CI)] was 4·5 (3·4-5·9) in intervention arm, and 3·8 (2·6-5·4) per 100 person-years in control arm clusters [mortality rate ratio (MRR): 1·19 (95% CI 0·79-1·80)]. Mortality rates among HIV-TB co-infected patients was 10·1 (6·7-15·3) and 9·8 (5·0-18·9) per 100 person-years, [MRR: 1·04 (95% CI 0·51-2·10)], in intervention and control arm clusters, respectively.

INTERPRETATION

HIV-TB integration supported by a QI intervention did not reduce mortality in HIV-TB co-infected patients. Demonstrating mortality benefit from health systems process improvements in real-world operational settings remains challenging. Despite the study being potentially underpowered to demonstrate the effect size, integration interventions were implemented using existing facility staff and infrastructure reflecting the real-world context where most patients in similar settings access care, thereby improving generalizability and scalability of study findings.

FUNDING

Research reported in this publication was supported by South African Medical Research Council (SAMRC), and UK Government's Newton Fund through United Kingdom Medical Research Council (UKMRC).

Factors associated with survival in adult people living with HIV/AIDS (PLHAs) in Mumbai, India (2004-2019): A retrospective cohort study

Background:

Knowledge of factors that affect survival in People living with HIV/AIDS (PLHAs) on anti-retroviral therapy (ART) will help us develop and implement interventions to improve the clinical outcomes and survival in these individuals. The aim of this study was to estimate the survival in PLHAs on ART in the government ART programme in Mumbai, and the factors associated with survival in these individuals.

Methods:

It is a retrospective survival analysis of 28,345 adult PLHAs from 18 government ART centres in Mumbai (registration period 2004–2019). We estimated the mortality rates and their 95% confidence intervals [CIs], plotted the Kaplan Meier Survival curves, estimated incidence rate ratios (IRR) and hazard ratios (HR). There were done for the whole cohort and according to various demographic and clinical characteristics.

Results:

The mortality in PLHAs on ART was 9.04 per 1000 person years. The HR was significantly for those aged 50 years and more at the time of registration (HR: 3.01, 95% CI: 2.37, 3.83; P < 0.001), in those with baseline CD4 count of less than 200 higher hazard (HR: 1.83, 95% CI: 1.47, 2.27; P < 0.001), those with an adherence of 80–95% (HR; 5.58, 95% CI: 4.61, 6.75; P < 0.001) and adherence of <80% (HR: 9.37, 95% CI: 7.74, 11.33; P < 0.001). Furthermore, the hazard was significantly higher in those with TB compared those without TB (HR: 3.28, 95% CI: 2.87, 3.75; P < 0.001). Time from diagnosis (per month increase) to initiation of ART was not significantly associated with mortality.

Conclusions:

Increasing awareness about HIV testing and early detection of HIV in those who have high-risk behaviours, prompt diagnosis and management of TB among those infected, and developing and implementing strategies (such as enhanced counselling, telephone-based applications, messages, or reminders) to ensure ART adherence of more than 95% in those on ART will potentially help improve survival in PLHAs in India.