Tracking cryptococcal meningitis to monitor HIV program success during the Treat-All era: an analysis of national data in Botswana.

BACKGROUND: Cryptococcal meningitis causes substantial mortality in high-HIV prevalence African countries despite advances in disease management and increasing antiretroviral therapy coverage. Reliable diagnosis of cryptococcal meningitis is cheap and more accessible than other indicators of AHD burden such as CD4 testing or investigation for disseminated tuberculosis; therefore, monitoring cryptococcal meningitis incidence has the potential to serve as a valuable metric of HIV programmatic success. METHODS: Botswana national meningitis surveillance data from 2015 to 2022 were obtained from electronic health records. All electronic laboratory records from cerebrospinal fluid samples analysed within government healthcare facilities in Botswana were extracted from a central online repository. Adjustments for missing data were made through triangulation with prospective cohort study datasets. Cryptococcal meningitis case frequency was enumerated using a case definition and incidence calculated using national census data. RESULTS: A total of 1,744 episodes of cryptococcal meningitis were identified; incidence declined from 15.0 (95% CI 13.4-16.7) cases/100,000 person-years in 2015 to 7.4 (95% CI 6.4-8.6) cases/100,000 person-years in 2022. However, the rate of decline slowed following the introduction of universal treatment in 2016. The highest incidence was observed in men and individuals aged 40-44. The proportion of cases diagnosed through cryptococcal antigen testing increased from 35.5% to 86.3%. CONCLUSION: Cryptococcal meningitis incidence has decreased in Botswana following expansion of ART coverage but persists at a stubbornly high incidence. Most cases are now diagnosed through the cheap and easy-to-use cryptococcal antigen test highlighting the potential of using cryptococcal meningitis as key metric of programme success in the Treat All era.

Prevalence of Emergent Dolutegravir Resistance Mutations in People Living with HIV: A Rapid Scoping Review.

BACKGROUND: Dolutegravir (DTG) is a cornerstone of global antiretroviral (ARV) therapy (ART) due to its high efficacy and favorable tolerability. However, limited data exist regarding the risk of emergent integrase strand transfer inhibitor (INSTI) drug-resistance mutations (DRMs) in individuals receiving DTG-containing ART. METHODS: We performed a PubMed search using the term "Dolutegravir", last updated 18 December 2023, to estimate the prevalence of VF with emergent INSTI DRMs in people living with HIV (PLWH) without previous VF on an INSTI who received DTG-containing ART. RESULTS: Of 2131 retrieved records, 43 clinical trials, 39 cohorts, and 6 cross-sectional studies provided data across 6 clinical scenarios based on ART history, virological status, and co-administered ARVs: (1) ART-naïve PLWH receiving DTG plus two NRTIs; (2) ART-naïve PLWH receiving DTG plus lamivudine; (3) ART-experienced PLWH with VF on a previous regimen receiving DTG plus two NRTIs; (4) ART-experienced PLWH with virological suppression receiving DTG plus two NRTIs; (5) ART-experienced PLWH with virological suppression receiving DTG and a second ARV; and (6) ART-experienced PLWH with virological suppression receiving DTG monotherapy. The median proportion of PLWH in clinical trials with emergent INSTI DRMs was 1.5% for scenario 3 and 3.4% for scenario 6. In the remaining four trial scenarios, VF prevalence with emergent INSTI DRMs was ≤0.1%. Data from cohort studies minimally influenced prevalence estimates from clinical trials, whereas cross-sectional studies yielded prevalence data lacking denominator details. CONCLUSIONS: In clinical trials, the prevalence of VF with emergent INSTI DRMs in PLWH receiving DTG-containing regimens has been low. Novel approaches are required to assess VF prevalence with emergent INSTI DRMs in PLWH receiving DTG in real-world settings.

Treatment Emergent Dolutegravir Resistance Mutations in Individuals Naïve to HIV-1 Integrase Inhibitors: A Rapid Scoping Review.

Background: Dolutegravir (DTG)-based antiretroviral therapy (ART) rarely leads to virological failure (VF) and drug resistance in integrase strand transfer inhibitor (INSTI)-naïve persons living with HIV (PLWH). As a result, limited data are available on INSTI-associated drug resistance mutations (DRMs) selected by DTG-containing ART regimens. Methods: We reviewed studies published through July 2023 to identify those reporting emergent major INSTI-associated DRMs in INSTI-naïve PLWH receiving DTG and those containing in vitro DTG susceptibility results using a standardized assay. Results: We identified 36 publications reporting 99 PLWH in whom major nonpolymorphic INSTI-associated DRMs developed on a DTG-containing regimen and 21 publications containing 269 in vitro DTG susceptibility results. DTG-selected DRMs clustered into four largely non-overlapping mutational pathways characterized by mutations at four signature positions: R263K, G118R, N155H, and Q148H/R/K. Eighty-two (82.8%) viruses contained just one signature DRM, including R263K (n = 40), G118R (n = 24), N155H (n = 9), and Q148H/R/K (n = 9). Nine (9.1%) contained ≥1 signature DRM, and eight (8.1%) contained just other DRMs. R263K and G118R were negatively associated with one another and with N155H and Q148H/K/R. R263K alone conferred a median 2.0-fold (IQR: 1.8-2.2) reduction in DTG susceptibility. G118R alone conferred a median 18.8-fold (IQR:14.2-23.4) reduction in DTG susceptibility. N155H alone conferred a median 1.4-fold (IQR: 1.2-1.6) reduction in DTG susceptibility. Q148H/R/K alone conferred a median 0.8-fold (IQR: 0.7-1.1) reduction in DTG susceptibility. Considerably higher levels of reduced susceptibility often occurred when signature DRMs occurred with additional INSTI-associated DRMs. Conclusions: Among INSTI-naïve PLWH with VF and treatment emergent INSTI-associated DRMs, most developed one of four signature DRMs, most commonly R263K or G118R. G118R was associated with a much greater reduction in DTG susceptibility than R263K.

Five years after Treat All implementation: Botswana's HIV response and future directions in the era of COVID-19.

BACKGROUND: As the relentless coronavirus disease-2019 (COVID-19) pandemic continues to spread across Africa, Botswana could face challenges maintaining the pathway towards control of its HIV epidemic. OBJECTIVE: Utilising the Spectrum GOALS module (GOALS-2021), the 5-year outcomes from the implementation of the Treat All strategy were analysed and compared with the original 2016 Investment Case (2016-IC) projections. Future impact of adopting the new Joint United Nations Programme on HIV/AIDS (UNAIDS) Global AIDS Strategy (2021-2026) targets and macroeconomic analysis estimating how the financial constraints from the COVID-19 pandemic could impact the available resources for Botswana's National HIV Response through 2030 were also considered. METHOD: Programmatic costs, population demographics, prevention and treatment outputs were determined. Previous 2016-IC data were uploaded for comparison, and inputs for the GOALS, AIM, DemProj, Resource Needs and Family Planning modules were derived from published reports, strategic plans, programmatic data and expert opinion. The economic projections were recalibrated with consideration of the impact of the COVID-19 pandemic. RESULTS: Decreases in HIV infections, incidence and mortality rates were achieved. Increases in laboratory costs were offset by estimated decreases in the population of people living with HIV (PLWH). Moving forward, young women and others at high risk must be targeted in HIV prevention efforts, as Botswana transitions from a generalised to a more concentrated epidemic. CONCLUSION: The Treat All strategy contributed positively to decreases in new HIV infections, mortality and costs. If significant improvements in differentiated service delivery, increases in human resources and HIV prevention can be realised, Botswana could become one of the first countries with a previously high-burdened generalised HIV epidemic to gain epidemic control, despite the demands of the COVID-19 pandemic.

Etonogestrel concentrations among contraceptive implant users in Botswana using and not using dolutegravir-based antiretroviral therapy.

OBJECTIVES: To evaluate whether etonogestrel concentrations are reduced to a level that could potentially reduce contraceptive efficacy when the etonogestrel contraceptive implant is used concomitantly with dolutegravir-based antiretroviral therapy (ART). STUDY DESIGN: We conducted a non-randomized, open-label, cross-sectional pharmacokinetic study among women using single-rod etonogestrel contraceptive implants in Botswana. We compared plasma etonogestrel concentrations, sampled at a single time-point between 3 and 12 months from implant insertion, among implant users living with HIV and receiving dolutegravir-based ART with HIV-negative implant users. We also assessed concentrations among implant users living with HIV and receiving efavirenz-based ART. We compared geometric mean etonogestrel concentrations analyzing data from 142 participants: 97 HIV-negative, 30 using dolutegravir, and 15 using efavirenz. RESULTS: The groups were similar. Duration of implant use was between 3 and 12 months (median = 5). Geometric mean etonogestrel plasma concentrations and 90% confidence intervals of the mean were 227.5(212.4-243.8), 289.6(251.8-333.0) and 76.4(63.9-91.4) pg/mL among the HIV-negative, dolutegravir- and efavirenz-based ART groups, respectively. All women in the HIV-negative and dolutegravir-based ART groups had etonogestrel concentrations above 90 pg/mL; 9/15 women (60%) using efavirenz-based ART had concentrations below 90 pg/mL. On average, etonogestrel levels were lower among individuals who had implants inserted for longer durations. CONCLUSIONS: Implant users receiving dolutegravir-based ART had a higher mean etonogestrel concentration compared to HIV-negative women, and none had etonogestrel concentrations below the posited threshold for ovulation suppression. In contrast, women in the efavirenz-group had much lower etonogestrel concentrations. Overall, these data provide evidence that the etonogestrel implant may be effectively combined with dolutegravir-based ART regimens. IMPLICATIONS: The etonogestrel implant remains a highly effective contraceptive option for women living with HIV who use dolutegravir-based ART.

Discussing matters of sexual health with children: what issues relating to disclosure of parental HIV status reveal.

Little is published about the disclosure of parents' own HIV status to their children in Africa. Research shows that keeping family secrets from children, including those related to a parent's HIV status, can be detrimental to their psychological well-being and to the structure of the family. Further, children with HIV-positive parents have been shown to be more vulnerable to poorer reproductive health outcomes. This qualitative study in Botswana conducted in-depth interviews among 21 HIV-positive parents on antiretroviral therapy. The data revealed that parents found discussing the issue of HIV with children difficult, including disclosing their own HIV status to them. Reasons for disclosing included: children being HIV positive, the rest of the family knowing, or the parent becoming very sick. Reasons for not disclosing included: believing the child to be too young, not knowing how to address the issue of HIV, that it would be "too painful" for the child/ren. Concern that other people might find out about their status or fear of children experiencing stigmatising behaviour. Interviews elucidated the difficulty that parents have in discussing their own HIV status and more general sexual health issues with their children. Parents and other guardians require support in managing age-appropriate disclosure to their children. This may further enable access to forums that can help children cope with their fears about the future and develop life skills in preparation for dealing with relationships of a sexual nature and sexual health as children move into adulthood. In developing such support mechanisms, changing family roles in Botswana need to be taken into consideration and the role of other family members in the upbringing of children in Tswana society need to be recognised and utilised.

Comparison of an in-house 'home-brew' and commercial ViroSeq integrase genotyping assays on HIV-1 subtype C samples.

BACKGROUND: Roll-out of Integrase Strand Transfer Inhibitors (INSTIs) such as dolutegravir for HIV combination antiretroviral therapy (cART) in sub-Saharan Africa necessitates the development of affordable HIV drug resistance (HIVDR) assays targeting the Integrase gene. We optimised and evaluated an in-house integrase HIV-1 drug resistance assay (IH-Int) and compared it to a commercially available assay, ViroSeq™ Integrase Genotyping kit (VS-Int) amongst HIV-1 clade C infected individuals. METHODS: We used 54 plasma samples from treatment naïve participants and one plasma sample from a patient failing INSTI based cART. Specimens were genotyped using both the VS-Int and IH-Int assays. Stanford HIV drug resistance database were used for integrase resistance interpretation. We compared the major and minor resistance mutations, pairwise nucleotide and amino-acid identity, costs and assay time. RESULTS: Among 55 specimens tested with IH-Int, 53 (96.4%) successfully amplified compared to 45/55 (81.8%) for the VS-Int assay. The mean nucleotide and amino acid similarity from 33 paired sequences was 99.8% (SD ± 0.30) and 99.8% (SD ± 0.39) for the IH-Int and VS-Int assay respectively. The reagent cost/sample were 32 USD and 147 USD for IH-Int and VS-Int assay, respectively. All sequenced samples were confirmed as HIV-1 subtype C. CONCLUSIONS: The IH-Int assay had a high amplification success rate and high concordance with the commercial assay. It is significantly cheaper compared to the commercial assay. Our assay has the needed specifications for routine monitoring of participants on Dolutegravir based regimens in Botswana.

The relationship of acceptance or denial of HIV-status to antiretroviral adherence among adult HIV patients in urban Botswana.

Adherence to antiretroviral therapy among HIV patients is the most important patient-enabled factor related to virological failure and can lead to drug resistance. It is important to avoid virological failure, especially in resource-limited settings where treatment options are limited and the effects of treatment failure are profound. This qualitative study aimed to identify the psycho-social factors related to adherence behaviour in Gaborone, Botswana, a high prevalence setting in southern Africa. One-to-one, in-depth interviews were conducted with adult antiretroviral patients in the private and public health sectors who had been on antiretroviral therapy for a minimum of 6 months. A grounded theory approach was adopted and patients were selected purposively and theoretical sampling determined the final sample size. Thirty-two patients were interviewed, 22 from the public-sector, the mean age was 9.5 years and 53% were women. We found that acceptance of HIV-status, the ability to avoid internalising stigmatising attitudes and identification of an encouraging confidante were key factors related to good adherence. Encouraging confidantes (including clinicians) and contributed to promoting hope and acceptance of HIV-status, enabling patients to develop a positive therapeutic relationship with their antiretrovirals and make lifestyle changes that promoted adherence. Active participation in a social network and a desire to avoid being thin and visibly identifiable as HIV-positive were also adherence-motivating factors. Conversely, participants who expressed some degree of denial about their HIV-status tended to express emotions associated with depression, and internalised stigma that inhibited the development of a relationship with a confidante. We feel it is important to identify individuals with HIV who are still in some degree of denial about their status and to identify depression among patients on antiretrovirals. This will enable more targeted, individualised support in the management of individuals' HIV disease.

Four-class drug-resistant HIV-1 subtype C in a treatment experienced individual on dolutegravir-based antiretroviral therapy in Botswana.

: There are limited data on the effectiveness of dolutegravir (DTG)-based combination antiretroviral therapy (ART) in real-life settings in southern Africa where HIV-1 subtype C predominates. We report a patient infected with HIV-1 subtype C on DTG-based ART previously exposed to raltegravir who developed multidrug resistance mutations to four antiretroviral classes. There is need for drug resistance monitoring and clinical vigilance to ensure effectiveness of HIV treatment programs even in the era of DTG-based ART.

Effects of HIV type 1 infection on hematopoiesis in Botswana.

Clinical observations suggest that HIV-1 infection causes higher anemia rates in patients in southern Africa than in those in the United States. To explore this difference we performed a cross-sectional exploratory study on the effect of HIV-1 infection on hematopoiesis in Botswana by examining hematological presentation, HIV disease state, hematopoietic progenitor cell number, and circulating viral levels in HIV-infected patients and HIV-uninfected controls. We found significant associations between CD34(+) and CD4(+) cell counts in HIV-positive patients. Significant relationships were also seen between the CD34(+) CD4(+) cell population and hemoglobin levels, as well as colony-forming ability. These associations, however, were not seen in uninfected controls. Circulating viral p24 levels were found to correlate significantly with CD34(+) cell count, CD34(+) CD4(+) cell count, and colony-forming ability. These results demonstrate a direct association between HIV-1 infection in southern Africa and hematopoietic progenitor cell health.

Serological evidence of HIV-associated infection among HIV-1-infected adults in Botswana.

In industrialized countries, it is recommended that adults with human immunodeficiency virus type 1 (HIV-1) infection undergo baseline screening for pathogens that might cause latent or active infections, such as syphilis, hepatitis B, hepatitis C, infection due to Toxoplasma gondii, and cytomegalovirus infection. A paucity of data exist from sub-Saharan Africa describing the prevalence of these pathogens. We report data for HIV-1-infected adults referred for initiation of highly active antiretroviral therapy in Botswana.

Establishment of a public antiretroviral treatment clinic for adults in urban Botswana: lessons learned.

Countries in sub-Saharan Africa are under significant pressure to open large-scale, public antiretroviral treatment clinics. Many lessons have been learned in Botswana, where the first public antiretroviral treatment clinic in Africa was established. The availability of core, well-trained medical staff will be the primary factor that limits a rapid scale-up of antiretroviral treatment programs.

Mutations and polymorphisms associated with antiretroviral drugs in HIV-1C-infected African patients.

To detect and characterize polymerase gene (pol) polymorphisms and mutation patterns in HIV-1C-infected Batswana patients treated with reverse transcriptase inhibitors, samples from AIDS patients treated with highly active antiretroviral therapy (HAART) were sequenced for the region encompassing the entire HIV-1 protease (PR) and the first 335 amino acids of reverse transcriptase (RT). Amongst the 16 patients treated with antiretroviral (ARV) drugs, eight started HAART regimens containing didanosine, stavudine and nevirapine (ddI/d4T/NVP) or efavirenz (EFV) (arm A) while the others started with zidovudine (AZT) and lamivudine (3TC) given together as combivir (CBV) with either NVP or EFV as arm B. Arm B is the first line regimen currently provided by the Botswana ARV national programme. Greater efficacy, in terms of treatment duration, was observed in patients in arm B (14 months) as compared with patients in arm A (9 months); P<0.05, n=8. Appearance of the M184V mutation in the arm B patients coincided with a rebound of viral load (VL) (4.3 +/-0.1 log10 RNA copies/ml) and a significantly improved immunological parameter (deltaCD4=207.0+/-48.1 cells/microl; P<0.05). Interestingly, patients developing the M184V mutation preferentially harboured polymorphisms Q174K and/or I178L located in close proximity to pol position 184. The M184V mutation occurred following a clear clinical benefit consisting of increased CD4 cell counts and lower plasma viral loads. Primary mutations known to be associated with NNRTI and NRTI resistance for HIV-1B were observed in 10 of the 16 treated patients.

Outcomes of the Botswana national HIV/AIDS treatment programme from 2002 to 2010: a longitudinal analysis.

BACKGROUND: Short-term mortality rates among patients with HIV receiving antiretroviral therapy (ART) in sub-Saharan Africa are higher than those recorded in high-income countries, but systematic long-term comparisons have not been made because of the scarcity of available data. We analysed the effect of the implementation of Botswana's national ART programme, known as Masa, from 2002 to 2010. METHODS: The Masa programme started on Jan 21, 2002. Patients who were eligible for ART according to national guidelines had their data collected prospectively through a clinical information system developed by the Botswana Ministry of Health. A dataset of all available electronic records for adults (≥18 years) who had enrolled by April 30, 2010, was extracted and sent to the study team. All data were anonymised before analysis. The primary outcome was mortality. To assess the effect of loss to follow-up, we did a series of sensitivity analyses assuming varying proportions of the population lost to follow-up to be dead. FINDINGS: We analysed the records of 126,263 patients, of whom 102,713 had documented initiation of ART. Median follow-up time was 35 months (IQR 14-56), with a median of eight follow-up visits (4-14). 15,270 patients were deemed lost to follow-up by the end of the study. 63% (78,866) of the study population were women; median age at baseline was 34 years for women (IQR 29-41) and 38 years for men (33-45). 10,230 (8%) deaths were documented during the 9 years of the study. Mortality was highest during the first 3 months after treatment initiation at 12·8 deaths per 100 person-years (95% CI 12·4-13·2), but decreased to 1·16 deaths per 100 person-years (1·12-1·2) in the second year of treatment, and to 0·15 deaths per 100 person-years (0·09-0·25) over the next 7 years of follow-up. In each calendar year after the start of the Masa programme in 2002, average CD4 cell counts at enrolment increased (from 101 cells/µL [IQR 44-156] in 2002, to 191 cells/µL [115-239] in 2010). In each year, the proportion of the total enrolled population who died in that year decreased, from 63% (88 of 140) in 2002, to 0·8% (13 of 1599) in 2010. A sensitivity analysis assuming that 60% of the population lost to follow-up had died gave 3000 additional deaths, increasing overall mortality from 8% to 11-13%. INTERPRETATION: The Botswana national HIV/AIDS treatment programme reduced mortality among adults with HIV to levels much the same as in other low-income or middle-income countries. FUNDING: The African Comprehensive HIV/AIDS Partnerships.

Implementing HIV-1 genotypic resistance testing in antiretroviral therapy programs in Africa: needs, opportunities, and challenges.

Tremendous progress has been made with the scale-up of antiretroviral therapy in Africa, with an estimated seven million people now receiving antiretroviral therapy in the region. The long-term success of antiretroviral therapy programs depends on appropriate strategies to deal with potential threats, one of which is the emergence and spread of antiretroviral drug resistance. Whilst public health surveillance forms the mainstay of the World Health Organization approach to antiretroviral drug resistance, there is likely to be increasing demand for access to drug resistance testing as programs mature and as HIV clinical management becomes more complex. African-owned research initiatives have helped to develop affordable resistance testing appropriate for use in the region, and have developed delivery models for resistance testing at different levels of the public health system. Some upper-middle-income countries such as Botswana and South Africa have introduced drug resistance testing for selected patient groups to guide clinical management. The scale-up of resistance testing will require substantial expansion of clinical and laboratory capacity in the region, but the expertise and resources exist in Africa to support this. The long-term population health impact and cost-effectiveness of resistance testing in the region will also require further investigation.

Five-year follow up of genotypic resistance patterns in HIV-1 subtype C infected patients in Botswana after failure of thymidine analogue-based regimens.

OBJECTIVE: Our objective was to establish genotypic resistance profiles among the 4% of Batswana patients who experienced virologic failure while being followed within Botswana's National Antiretroviral Treatment Program between 2002 and 2007. METHODS: At the beginning of the national program in 2002, almost all patients received stavudine (d4T), together with didanosine (ddI), as part of their first nucleoside reverse transcriptase inhibitor (NRTI)-based regimen (Group 1). In contrast, the standard of care for all patients subsequently enrolled (2002-2007) included zidovudine/lamivudine (ZDV/3TC) (Group 2). Genotypes were analyzed in 26 patients from Group 1 and 37 patients from Group 2. Associations between mutations were determined using Pearson's correlation coefficient and Jaccard's coefficient of similarity. RESULTS: Seventy-eight percent of genotyped patients possessed mutations associated with protease inhibitor (PI) resistance while 87% and 90%, respectively, exhibited mutations associated with NRTIs and non-nucleoside reverse transcriptase inhibitors (NNRTIs). The most frequent PI mutations involving resistance to NFV were L90M (25.2%) and D30N (16.2%), but mutations at positions K45Q and D30N were often observed in tandem (P = 60.5, J = 50; p = 0.002; Group 2) alongside Q61E in 42.8% of patients who received ZDV/3TC. Both major patterns of thymidine analogue mutations, TAM 1 (48%) and TAM 2 (59%), were represented in patients from Group 1 and 2, although M184V was higher among individuals who had initially received ddI (61% versus 40.5%). In contrast, L74V was more frequent among individuals from Group 2 (16.2% versus 7.7%). Differences in regard to NNRTI mutations were also observed between Group 1 and Group 2 patients. CONCLUSION: Despite a low rate of therapeutic failure (4%) among these patients, those who failed possessed high numbers of resistance mutations as well as novel resistance mutations and/or polymorphisms at sites within reverse transcriptase and protease.

Overestimates of survival after HAART: implications for global scale-up efforts.

BACKGROUND: Monitoring the effectiveness of global antiretroviral therapy scale-up efforts in resource-limited settings is a global health priority, but is complicated by high rates of losses to follow-up after treatment initiation. Determining definitive outcomes of these lost patients, and the effects of losses to follow-up on estimates of survival and risk factors for death after HAART, are key to monitoring the effectiveness of global HAART scale-up efforts. METHODOLOGY/PRINCIPAL FINDINGS: A cohort study comparing clinical outcomes and risk factors for death after HAART initiation as reported before and after tracing of patients lost to follow-up was conducted in Botswana's National Antiretroviral Therapy Program. 410 HIV-infected adults consecutively presenting for HAART were evaluated. The main outcome measures were death or loss to follow-up within the first year after HAART initiation. Of 68 patients initially categorized as lost, over half (58.8%) were confirmed dead after tracing. Patient tracing resulted in reporting of significantly lower survival rates when death was used as the outcome and losses to follow-up were censored [1-year Kaplan Meier survival estimate 0.92 (95% confidence interval, 0.88-0.94 before tracing and 0.83 (95% confidence interval, 0.79-0.86) after tracing, log rank P<0.001]. In addition, a significantly increased risk of death after HAART among men [adjusted hazard ratio 1.74 (95% confidence interval, 1.05-2.87)] would have been missed had patients not been traced [adjusted hazard ratio 1.41 (95% confidence interval, 0.65-3.05)]. CONCLUSIONS/SIGNIFICANCE: Due to high rates of death among patients lost to follow-up after HAART, survival rates may be inaccurate and important risk factors for death may be missed if patients are not actively traced. Patient tracing and uniform reporting of outcomes after HAART are needed to enable accurate monitoring of global HAART scale-up efforts.

Five-year outcomes of initial patients treated in Botswana's National Antiretroviral Treatment Program.

BACKGROUND: Antiretroviral treatment (ART) initiatives have now been established in many sub-Saharan African countries showing early benefits. To date, few results are available concerning long-term clinical outcomes in these treatment programs. METHODS: Response to ART is described in the first HIV-1C-infected adults enrolled in the Botswana Antiretroviral Treatment Program in 2002. Data analysis was conducted on available longitudinal data up to 1st April 2007. RESULTS: Six hundred thirty-three severely immunodeficient patients with a median CD4+ cell count of 67 cells/microl were initiated on non-nucleoside reverse transcriptase inhibitor-based combination ART and followed for a median of 41.9 months. The median CD4+ cell count increases were 169, 302, and 337 cells/microl at 1, 3, and 5 years, respectively. The percentages of patients with a viral load of less than 400 copies/ml at 1, 3, and 5 years were 91.3, 90.1, and 98.3%, respectively. Seventy-five percent of patients did not miss a single, or missed only one, monthly ART pickup per year with a mean pickup rate of 92.5%. The Kaplan-Meier survival estimates [95% confidence interval (CI)] at 1, 3, and 5 years were 82.7% (81.2 and 84.3%), 79.3% (77.6 and 81.0%), and 79.0% (77.3 and 80.7%), respectively. At 6 months, the risk of treatment modification for anemia was 6.94% (5.9 and 8.0%) for cutaneous hypersensitivity reactions, 1.3% (0.8 and 1.7%), and 1.1% (0.7 and 1.6%) for hepatotoxicity. CONCLUSION: This initial group of adults on ART in Botswana had excellent sustained immunologic, virologic, and clinical outcomes for up to 5 years of follow-up with low mortality among those surviving into the second year of ART.

Strengthening healthcare capacity through a responsive, country-specific, training standard: the KITSO AIDS training program's support of Botswana's national antiretroviral therapy rollout.

In parallel with the rollout of Botswana's national antiretroviral therapy (ART) program, the Botswana Ministry of Health established the KITSO AIDS Training Program by entering into long-term partnerships with the Botswana-Harvard AIDS Institute Partnership for HIV Research and Education and others to provide standardized, country-specific training in HIV/AIDS care. The KITSO training model has strengthened human capacity within Botswana's health sector and been indispensable to successful ART rollout. Through core and advanced training courses and clinical mentoring, different cadres of health care workers have been trained to provide high-quality HIV/AIDS care at all ART sites in the country. Continuous and standardized clinical education will be crucial to sustain the present level of care and successfully address future treatment challenges.

Infection of hematopoietic progenitor cells by HIV-1 subtype C, and its association with anemia in southern Africa.

Reports from southern Africa, an area in which human immunodeficiency virus type 1 (HIV-1) infection is caused almost exclusively by subtype C (HIV-1C), have shown increased rates of anemia in HIV-infected populations compared with similar acquired immunodeficiency syndrome (AIDS) patients in the United States, an area predominantly infected with subtype B (HIV-1B). Recent findings by our group demonstrated a direct association between HIV-1 infection and hematopoietic progenitor cell health in Botswana. Therefore, using a single-colony infection assay and quantitative proviral analysis, we examined whether HIV-1C could infect hematopoietic progenitor cells (HPCs) and whether this phenotype was associated with the higher rates of anemia found in southern Africa. The results show that a significant number of HIV-1C, but not HIV-1B, isolates can infect HPCs in vitro (P < .05). In addition, a portion of HIV-1C-positive Africans had infected progenitor cell populations in vivo, which was associated with higher rates of anemia in these patients (P < .05). This represents a difference in cell tropism between 2 geographically separate and distinct HIV-1 subtypes. The association of this hematotropic phenotype with higher rates of anemia should be considered when examining anti-HIV drug treatment regimens in HIV-1C-predominant areas, such as southern Africa.