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1.
Tuberculosis (TB) remains a global emergency and is responsible for 1.7 million deaths annually. Widespread global misuse of isoniazid and rifampicin over three decades has resulted in emergence of the ominous spread of multidrug‐resistant TB (MDR‐TB) and extensively drug‐resistant TB (XDR‐TB) globally. These difficult to treat resistant forms of TB are increasingly seen in Asia, Eastern Europe, South America and sub‐Saharan Africa, disrupting TB and HIV control programmes. We review the latest available global epidemiological and clinical evidence on drug‐resistant TB in HIV‐infected and uninfected populations, with focus on Africa where data are scanty because of poor diagnostic and reporting facilities. The difficult management and infection control problems posed by drug‐resistant TB in HIV‐infected patients are discussed. Given the increasing current global trends in MDR‐TB, aggressive preventive and management strategies are urgently required to avoid disruption of global TB control efforts. The data suggest that existing interventions, public health systems and TB and HIV programmes must be strengthened significantly. Political and funder commitment is essential to curb the spread of drug‐resistant TB.  相似文献   

2.
Objectives To describe the development and operation of integrated tuberculosis (TB) and HIV care at the Martin Preuss Centre, a multipartner organization bringing together governmental and non‐governmental providers of HIV and TB services in Lilongwe, Malawi. Methods We used a case study approach to describe the integrated TB/HIV service and to illustrate successes and challenges faced by service providers. We quantified effective TB and HIV integration using indicators defined by the World Health Organization. Results The custom‐designed building facilitates patient flow and infection control, and other important elements include coordinated leadership; joint staff training and meetings; and data systems prompting coordinated care. Some integrated services have worked well from the outset, such as promoting HIV testing among patients with TB (96% of patients with TB had documented HIV status in 2009). Other aspects of integrated care have been more challenging, for example achieving high uptake of antiretroviral therapy among HIV‐positive TB patients and combining data from paper and electronic systems. Good TB treatment outcomes (>85% cure or completion) have been achieved among both HIV‐positive and HIV‐negative individuals. Conclusions High‐quality integrated services for TB and HIV care can be provided in a resource‐limited setting. Lessons learned may be valuable for service providers in other settings of high HIV and TB prevalence.  相似文献   

3.
Objective To determine the clinical profile and outcomes of health care workers (HCWs) with extensively drug resistant tuberculosis (XDR‐TB) in the Eastern and Western Cape Provinces of South Africa. Method Retrospective case record review of 334 patients with XDR‐TB reported during the period 1996–2008 from Western and Eastern Cape Province, Cape Town, South Africa. Case records of HCWs with XDR‐TB were analysed for clinical and microbiological features, and treatment outcomes. Results From 334 case records of patients with XDR‐TB, 10 HCWs were identified. Eight of ten were HIV‐uninfected, and four of 10 had died of XDR‐TB despite treatment. All 10 HCWs had received an average of 2.4 courses of TB treatment before being diagnosed as XDR‐TB. Conclusions In the Eastern and Western Cape provinces of South Africa XDR‐TB affects HCWs, is diagnosed rather late, does not appear to be related to HIV status and carries a high mortality. There is an urgent need for the South African government to implement WHO infection control recommendations and make available rapid drug susceptibility testing for HCWs with suspected multidrug‐resistant (MDR)/XDR‐TB. Further studies to establish the actual risk and sources of infection (nosocomial or community) are required.  相似文献   

4.
Objective To measure the burden and improve management of tuberculosis (TB), HIV‐associated TB and MDR TB in Tak Province, Thailand, which borders Myanmar. Methods From September 2006 to August 2007, we collected uniform data about TB cases and enhanced human immunodeficiency virus (HIV) counselling and testing. We provided mycobacterial culture and drug‐susceptibility testing in public or non‐governmental organization facilities. Patients were classified by nationality and, for non‐Thais, by migration status. Results Of 1662 TB cases in the 12‐month period, 1087 (65%) occurred in non‐Thais. Of non‐Thais, 415 (38%) lived in Myanmar but crossed the border for healthcare. HIV infection was diagnosed in 18% of Thais compared with 12% of non‐Thais (P < 0.01); HIV status was unknown for 22% of Thais and 27% of non‐Thais (P = 0.02). Overall, multidrug‐resistant (MDR) TB was diagnosed in 27 patients, 19 (70%) in non‐Thais. Among TB cases never previously treated for TB, no MDR cases were diagnosed in Thais or in Myanmar refugees, but six cases were diagnosed in migrants from Myanmar. Conclusions In Thailand, TB, HIV‐associated TB and MDR TB in migrants from Myanmar are important public health problems; they need to be resolved in both the countries.  相似文献   

5.
Objectives To investigate the burden and outcome of HIV infection and other morbidities amongst a Mozambican hospital staff. Methods Within an occupational health service set up in April 2008 in the provincial hospital of Tete, Mozambique, we offered to all staff members an initial clinical, laboratory and radiological screening and followed them up prospectively until April 2010. Results A total of 47.5% of 423 health workers attended the program. The cohort (female‐to‐male ratio: 2.2; mean age: 39 years) consisted mostly of auxiliary staff (43%) and nurses (29.8%). At initial screening, 71% were asymptomatic. HIV infection (28.4%) and tuberculosis (TB) (21%) were the main reported antecedent illnesses. Laboratory screening revealed anaemia (haemoglobin level <10 mg/dl) in 9% participants, abnormal liver enzymes in 23.9% and a reactive non‐treponemal syphilis test in 5%. Of 145 performed chest X‐rays, 13% showed abnormalities. All 113 health workers not recently tested for HIV were screened, and 31 were newly diagnosed with HIV infection (resulting in an overall HIV prevalence of 43.8%). Nine cases of TB were diagnosed at screening/during follow‐up. In April 2010, all but one of the participants were alive. All HIV‐infected health workers under antiretroviral therapy were actively followed‐up. Conclusion Serious conditions were frequently diagnosed in health workers, in particular HIV infection. Mid‐term outcome was favourable within this program. Creation of screening and care services dedicated to caregivers should be of highest priority in similar African settings.  相似文献   

6.
Objective To investigate the effects of nutritional supplementation on the outcome and nutritional status of south Indian patients with tuberculosis (TB) with and without human immunodeficiency virus (HIV) coinfection on anti‐tuberculous therapy. Method Randomized controlled trial on the effect of a locally prepared cereal–lentil mixture providing 930 kcal and a multivitamin micronutrient supplement during anti‐tuberculous therapy in 81 newly diagnosed TB alone and 22 TB–HIV‐coinfected patients, among whom 51 received and 52 did not receive the supplement. The primary outcome evaluated at completion of TB therapy was outcome of TB treatment, as classified by the national programme. Secondary outcomes were body composition, compliance and condition on follow‐up 1 year after cessation of TB therapy and supplementation. Results There was no significant difference in TB outcomes at the end of treatment, but HIV–TB coinfected individuals had four times greater odds of poor outcome than those with TB alone. Among patients with TB, 1/35 (2.9%) supplemented and 5/42(12%) of those not supplemented had poor outcomes, while among TB–HIV‐coinfected individuals, 4/13 (31%) supplemented and 3/7 (42.8%) non‐supplemented patients had poor outcomes at the end of treatment, and the differences were more marked after 1 year of follow‐up. Although there was some trend of benefit for both TB alone and TB–HIV coinfection, the results were not statistically significant at the end of TB treatment, possibly because of limited sample size. Conclusion Nutritional supplements in patients are a potentially feasible, low‐cost intervention, which could impact patients with TB and TB–HIV. The public health importance of these diseases in resource‐limited settings suggests the need for large, multi‐centre randomized control trials on nutritional supplementation.  相似文献   

7.
Objective To review the activities, progress, achievements and challenges of the Zambia Ministry of Health tuberculosis (TB)/HIV collaborative activities over the past decade. Methods Analysis of Zambia Ministry of Health National TB and HIV programme documents and external independent programme review reports pertaining to 2000–2010. Results The number of people testing for HIV increased from 37 557 persons in 2003 to 1 327 995 persons in 2010 nationally. Those receiving anti‐retroviral therapy (ART) increased from 143 in 2003 to 344 304 in 2010. The national HIV prevalence estimates declined from 14.3% in 2001 to 13.5% in 2009. The proportion of TB patients being tested for HIV increased from 22.6% in 2006 to 84% in 2010 and approximately 70% were HIV positive. The proportion of the HIV‐infected TB patients who: (i) started on ART increased from 38% in 2006 to 50% in 2010; (ii) commenced co‐trimoxazole preventive therapy (CPT) increased from 31% in 2006 to 70% in 2010; and (iii) were successfully treated increased to an average of 80% resulting in decline of deaths from 13% in 2006 to 9% in 2010. Conclusions The scale‐up of TB/HIV collaborative programme activities in Zambia has steadily increased over the past decade resulting in increased testing for TB and HIV, and anti‐retroviral (ARV) rollout with improved treatment outcomes among TB patients co‐infected with HIV. Getting service delivery points to adhere to WHO guidelines for collaborative TB/HIV activities remains problematic, especially those meant to reduce the burden of TB in people living with HIV/AIDS (PLWHA).  相似文献   

8.
9.
There is increasing consensus on the importance of strengthening global health research to meet health and development goals. Three key global health research aims are to ensure that research (i) addresses priority health needs, (ii) contributes to policy development, and (iii) adds value to investments in developing countries through South–South collaboration and capacity‐strengthening in the South. The ALPHA network (Analysing Longitudinal Population‐based HIV/AIDS data on Africa) is an illustrative example of how these global health research aims can be translated into action. The network facilitates additional collaborative HIV epidemiological research among six independent research projects in Africa studying population‐based cohorts. Under the first of the earlier mentioned aims, the network addresses key epidemiology research issues in HIV/AIDS which are crucial to making progress and monitoring progress in the response against HIV/AIDS. Under the second aim, the network’s scientific programme of research has contributed to strengthening the evidence base on HIV epidemiology in Africa and has informed policy development in areas such as targeted HIV prevention, social support, monitoring epidemic response and epidemic forecasting. Under the third aim, investment in the network has added value to the research investment in the individual projects through capacity development among African researchers as well as through the collaborative research outputs of the individual projects. Lessons from the network are relevant to collaborations facing similar challenges in other areas of global health research. These include the importance of establishing transparent and efficient governance for research collaborations, developing advance consensus on data sharing, ensuring effective communication for networking and demonstrating the added value of research investment in South–South collaborations.  相似文献   

10.
Objectives This study assesses the outcome of current treatment guidelines and the effect of highly active antiretroviral therapy (HAART) on survival of HIV/TB‐coinfected patients in a resource‐limited setting. Methods Observational cohort study at the pediatric HIV Clinic, RML Hospital, Delhi. All HIV‐infected patients who visited the clinic for the diagnosis of TB between 2002 and 2006 were observed until 31 March 2010. TB was diagnosed either at the time of enrolment or during follow‐up visits. Clinical and epidemiological data were registered. We compared children who were given HAART with TB treatment at time of diagnosis [simultaneous therapy (ST)] and children who received delayed HAART. Survival was assessed by Kaplan–Meier method and Cox regression model. Results Among the 298 children, 126 (42.2%) had TB, including 96 who received ST (76% of 126) and 30 who did not. There were no differences between the two groups except for a lower CD4 count in patients undergoing ST. ST was associated with improved survival [hazard ratio (HR), 0.35; 95% CI, 0.20–0.74; P = 0.002] and so were year of TB diagnosis and other AIDS‐defining conditions. Multivariate analysis revealed that ST was a powerful predictor of survival (HR, 0.30; 95% CI, 0.14–0.68; P = 0.003). After adjusting for other prognostic variables such as age, gender, CD4 count at time of TB diagnosis, by Cox multivariate analysis, ST remained robustly associated with improved survival (HR, 0.32; 95% CI, 0.17–0.71; P = 0.001). Conclusions Starting HAART during tuberculosis therapy significantly improves survival and provides further impetus for the integration of TB and HIV services.  相似文献   

11.
Objective To identify health facility and patient‐specific factors associated with TB treatment default in HIV‐infected patients, in a TB clinic on the campus of Mulago National Referral Hospital in Kampala, Uganda. Methods Unmatched case–control study between March and May 2009. Cases were TB patients known to have defaulted on their anti‐TB treatment, defined as a TB patient who had documented discontinuation of TB medication for two or more consecutive months due to reasons other than physician’s advice and who did not access care at another facility. Controls were TB patients who completed 8 months of anti‐TB treatment without interruption of two or more months. Data on health facility‐specific factors and individual characteristics were collected using semi‐structured questionnaires. Results Factors associated with defaulting from TB treatment were: distance from home to clinic (OR 2.22; 1.21–4.06); long waiting time at the clinic (OR 4.18; 2.18–8.02); poor drug availability (OR 4.75; 2.29–9.84); conduct of staff (OR 2.72; 1.02–7.25); lack of opportunity to express feelings (OR 3.47; 1.67–7.21). Other patient‐related factors were lack of health education, i.e. not being aware of the duration of treatment or the risk of discontinuing it (OR 5.31; 1.94–14.57); not knowing that TB can be cured (OR 44.11; 13.66–142.41); length of TB treatment (OR 10.77; 5.18–22.41), and side effects of treatment OR 5.53 (2.25–13.61). Conclusions Defaulting is influenced by health systems, staff factors, and patient misinformation. Health education on TB directed at patients combined with staff sensitization could help to improve adherence to TB treatment.  相似文献   

12.
Objective Diabetes is associated with pulmonary tuberculosis (TB), possibly due to impaired immunity, and diabetes may exacerbate the clinical manifestations of TB. Our aim was to assess the role of diabetes in the clinical manifestations of TB. Methods We studied 1250 patients with pulmonary TB in an urban population in a cross‐sectional study in Tanzania. All participants were tested for diabetes and HIV co‐infection, and TB culture intensity was assessed. Levels of white blood cells, haemoglobin, acute phase reactants, CD4 count and HIV viral load were measured, and a qualitative morbidity questionnaire was used to identify the prevalence of disease‐related symptoms. Results Tuberculosis patients with diabetes had a higher neutrophil count (B 0.5 × 109 cells/l, 95% CI 0.2; 0.9, P = 0.001) than non‐diabetic TB patients. Serum C‐reactive protein (B 18.8 mg/l, CI 95% 8.2; 29.4, P = 0.001) and alpha‐1‐acid glycoprotein (B 0.2 g/l, CI 95% 0.03; 0.3, P = 0.02) were similarly higher in patients with diabetes. Diabetes did not affect culture intensity or HIV status, but self‐reported fever was three times higher among participants with diabetes than in those without diabetes (OR 2.9, CI 95% 1.5; 5.7, P = 0.002). Conclusion Diabetes is associated with small changes in the manifestations of TB, but may have little clinical significance.  相似文献   

13.
Objective To evaluate retrospectively the microbiological profile of Mycobacterium species isolated from HIV‐infected patients attending the HIV/TB reference health care units in São José do Rio Preto, Brazil. Method Retrospective evaluation of all HIV‐1 positive patients whose IAL‐SJRP laboratorial analysis was positive for Mycobacterium sp. after diagnosis of HIV Infection, from January 2000 to December 2006. Results Of 198 patients, acid‐fast staining detected mycobacteria early in 41%. Culture revealed 52.5% to be infected with Mycobacterium tuberculosis (MT). 42.4% had non‐tuberculous mycobacteria (NTM) and 5.1% had MT/NTM positive cultures. Eleven per cent of MT strains were resistant to at least one of the antimycobacterial drugs and 3.1% were multidrug resistant. 39.4% of isolated mycobacteria were NTM species. Conclusion Our data may serve as a starting point for further comparisons with other Brazilian regions and other developing countries. The data may provide important clues to the future understanding, prevention and control of such co‐infections around the world.  相似文献   

14.
Tuberculosis (TB) is an international public health priority and kills almost two million people annually. TB is out of control in Africa due to increasing poverty and HIV coinfection, and drug‐resistant TB threatens to destabilize TB control efforts in several regions of the world. Existing diagnostic tools and therapeutic interventions for TB are suboptimal. Thus, new vaccines, immunotherapeutic interventions and diagnostic tools are urgently required to facilitate TB control efforts. An improved understanding of the immunopathogenesis of TB can facilitate the identification of correlates of immune protection, the design of effective vaccines, the rational selection of immunotherapeutic agents, the evaluation of new drug candidates, and drive the development of new immunodiagnostic tools. Here we review the immunology of TB with a focus on aspects that are clinically and therapeutically relevant. An immunologically orientated approach to tackling TB can only succeed with concurrent efforts to alleviate poverty and reduce the global burden of HIV.  相似文献   

15.
Objectives To describe initial registration characteristics of adult and paediatric TB patients at a large, public, integrated TB and HIV clinic in Lilongwe, Malawi, between January 2008 and December 2010. Methods Routine data on patient with TB category and TB type, stratified by HIV and ART status, were used to explore differences in proportions among TB only, TB/HIV co‐infected patients not on ART and TB/HIV co‐infected patients on ART using chi‐square tests. Trends over time illustrate strengths and weaknesses of integrated service provision. Results Among 10 143 adults, HIV ascertainment and ART uptake were high and increased over time. The proportion of relapse was highest among those on ART (5%). The proportion of smear‐positive pulmonary TB (PTB) was highest among HIV‐negative patients with TB (34.9%); extra‐pulmonary TB (EPTB) was lowest among TB only (16.2%). Among 338 children <15 years, EPTB and smear‐positive PTB were more common among TB‐only patients. Time trends showed significant increases in the proportion of adults with smear‐positive PTB and the proportion of adults already on ART before starting TB treatment. However, some co‐infected patients still delay ART initiation. Conclusions HIV ascertainment and ART uptake among co‐infected patients are successful and improving over time. However, delays in ART initiation indicate some weakness linking TB/HIV patients into ART during TB follow‐up care. Improved TB diagnostics and screening efforts, especially for paediatric patients, may help improve quality care for co‐infected patients. These results may aid efforts to prioritise TB and HIV prevention, education and treatment campaigns for specific populations.  相似文献   

16.
Objective To describe a participatory approach to implement and evaluate ways to integrate and train community care workers (CCWs) to enhance collaborative TB/HIV/PMTCT activities, and home‐based HIV counseling and testing (HCT) at community level. Methods The intervention study was conducted in Sisonke, a rural district of KwaZulu Natal, South Africa. A baseline household (HH) survey was conducted in 11 villages. Six villages were randomly selected into intervention and control clusters. Training was provided first to CCWs from the intervention cluster (IC) followed by the control cluster (CC). Routine monthly data from CCWs were collected from March–December 2010. The data was subjected to bivariate tests. Results The baseline HH survey revealed that of 3012 HH members visited by CCWs in 2008, 21% were screened for TB symptoms, 7% were visited for TB adherence support and 2% for ART adherence, and 1.5% were counselled on infant feeding options. A total of 89 CCWs were trained. Data show that during the study period in IC, 684 adults were offered HCT by CCWs, 92% accepted HCT and tested and 7% tested HIV‐positive and were referred to the clinic for further care. Of 3556 adults served in IC, 44% were screened for TB symptoms and 32% for symptoms of sexually transmitted infections (STIs) and 37% of children were traced as TB contact. Out of 6226 adults served in CC, 10% were screened for TB symptoms and 7% for STI symptoms. The differences in uptake of services between IC and CC were statistically significant (p < 0.05). Conclusion The findings of this study suggest higher uptake of TB and STI symptoms screening, TB contact tracing and home based HCT in the intervention clusters. This study suggests that up‐skilling CCWs could be one avenue to enhance TB/HIV case finding, TB contact tracing and linkages to care.  相似文献   

17.
Objectives To quantify the risk of infection and disease in spouses of tuberculosis patients and the extent to which intervention could reduce the risk in this highly exposed group. Methods We compared HIV prevalence, TB prevalence and incidence and tuberculin skin test (TST) results in spouses of TB patients and community controls. HIV‐positive spouses were offered isoniazid preventive therapy (IPT), and TST was repeated at 6, 12 and 24 months. Results We recruited 148 spouses of smear‐positive patients ascertained prospectively and 3% had active TB. We identified 203 spouses of previously diagnosed smear‐positive patients, 11 had already had TB, and the rate of TB was 2.4 per 100 person years(py) over 2 years (95% CI 1.15–5.09). 116 were found alive and recruited. HIV prevalence was 37% and 39% in the prospective and retrospective spouse groups and 17% in controls. TST was ≥10 mm in 80% of HIV negative and in 57% of HIV‐positive spouses ascertained retrospectively; 74% HIV negative and 62% HIV‐positive spouses ascertained prospectively, and 48% HIV negative and 26% HIV‐positive community controls. Of 54 HIV‐positive spouses, 18 completed 6‐month IPT. At 2 year follow‐up, 87% of surviving spouses had TST ≥10 mm and the rate of TB was 1.1 per 100 py (95% CI 0.34–3.29). Conclusions Spouses are a high‐risk group who should be screened for HIV and active TB. TST prevalence was already high by the time the spouses were approached but further infections were seen to occur. Uptake and adherence to IPT was disappointing, lessening the impact of short‐duration therapy.  相似文献   

18.
Objectives To identify key obstacles to operational integration of TB and HIV services and to suggest strategies to promote integration in the prevention, treatment and care of patients with TB and HIV. Methods This is a health systems research case study of operational integration of TB and HIV in South Africa. Peer‐reviewed and grey literature together with the experiences of the authors were used to identify key obstacles to integration in service implementation practices and community‐level care. Relevant legislation, policies and guidelines were analysed to determine whether they facilitated or undermined the integration of TB and HIV services. Results Obstacles to integration exist at contextual and epidemiological levels as well as at intervention design and implementation levels. Importantly, integration at an operational level is undermined by fundamentally different principles underpinning the design of TB and HIV programmes and national policies and legislation which mitigate against integration. Conclusion South Africa has an opportunity to effect changes that will facilitate TB/HIV integration and improve care for all those infected with TB, HIV or both conditions. An analytic approach necessary to understand the obstacles to and ensure effective strategies facilitating integration is required. This needs to be followed by mobilisation of clinical and health systems expertise, health infrastructure, commitment and experience in creative and appropriate ways for the variety of health care settings.  相似文献   

19.
The Stop TB Strategy and the Global Plan to Stop TB were launched in 2006 to achieve the tuberculosis (TB)‐related Millennium Development Goals and the Stop TB Partnership targets, and to address new challenges such as that of HIV‐associated TB and multi‐drug‐resistant TB. This paper reviews the historical and recent progress in TB control to show what has changed since the introduction of directly observed therapy (DOTS) in the mid‐1990s, why we needed the new strategy and what the global agenda is today. Major progress was seen in most countries in the last two decades. Globally, the estimated rates of TB prevalence and mortality are declining, but not quickly enough to reach the 2015 Stop TB Partnership targets of halving TB prevalence and death rates compared with 1990. In 2007, it was estimated that more than one‐third of TB patients were not detected or properly treated under proper conditions. Enhancing case detection, while maintaining high treatment success rates, is essential to achieve the 2015 targets. The ultimate goal of TB control is the elimination of the disease as a public health problem. The Stop TB Partnership aims at eliminating TB by 2050 by reaching a global incidence of disease of less than one case per million population. This target will not be achieved unless TB control efforts are further intensified and effective and affordable new technologies to prevent both disease and infection are developed and rapidly introduced in all countries worldwide.  相似文献   

20.
Chronic obstructive pulmonary disease (COPD) is an under recognized complication of HIV infection. It is estimated that up to 25% of HIV infected people may have COPD. HIV is associated with COPD as a result of a complex interplay of multiple factors such as pulmonary inflammation, recurrent pulmonary infections especially tuberculosis (TB), increased cigarette smoking, socio‐economic status, childhood respiratory illnesses and industrial and environmental exposures; each of which are risk factors for COPD in their own right. COPD presents at an earlier age in people with HIV infection. There are over 35 million people living with HIV, and most people infected with HIV live in developing regions of the world where they are faced with multiple risk factors for COPD and suboptimal access to health care. TB is the commonest infectious complication of HIV, and HIV infected persons often experience multiple episodes of TB. Cigarette smoking is increasing in developing countries where the greatest burden of TB and HIV is experienced. Cigarette smoking is associated with increased risk of TB and may be associated with acquisition of HIV infection and progression. It is not clear whether non‐infectious pulmonary inflammation persists in the lung when immune reconstitution occurs. Prevention and control of HIV infection must be part of the multiple interventions to reduce the global burden of COPD. A multidisciplinary approach, including behavioural science is required to address this challenge. It presents research opportunities that should be driven by the pulmonology community.  相似文献   

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