HIV testing among tuberculosis patients in the era of antiretroviral therapy: a population-based study in Brazil.

SETTING: Rio de Janeiro, Brazil, a city with 29862 cases of tuberculosis (TB) reported between January 1995 and June 1998. OBJECTIVES: To evaluate the counseling and testing practices for human immunodeficiency virus (HIV) infection among TB patients, and to identify the patient characteristics associated with HIV screening as antiretroviral therapy was introduced. DESIGN: Cross-sectional study of patients with TB who were reported to the health department and who initiated anti-TB treatment. The main outcome measure was screened versus not screened for HIV. RESULTS: The proportion of TB patients who received HIV screening increased from January 1995 through June 1998 (P < 0.001). Among young adults aged 20-49 years with TB, the independent predictors of HIV screening were a diagnosis of both pulmonary and extrapulmonary TB (odds ratio [OR] = 2.4, 95% confidence interval [CI] 2.1-2.8); TB meningitis (OR = 13.5, 95%CI 6.5-31.5); disseminated TB (OR = 8.2, 95%CI 5.3-12.9); lymphatic TB (OR = 5.6, 95%CI 4.7-6.6); and male sex (OR = 1.4, 95%CI 1.3-1.6). Patients with newly diagnosed TB who were women, lived in a low income neighborhood (OR = 0.7, 95%CI, 0.6-0.7), and sought TB treatment in their own residential neighborhood (OR = 0.3, 95%CI 0.3-0.4) were less likely to receive HIV counseling and testing. CONCLUSION: Health care providers in Rio de Janeiro selectively offered HIV counseling and testing to persons they perceived to be at risk for HIV and those with advanced stages of TB. HIV counseling and testing should be expanded and offered to all TB patients.     

Drug-resistant tuberculosis and HIV in Ukraine: a threatening convergence of two epidemics?

OBJECTIVE: To investigate anti-tuberculosis (TB) drug resistance rates in Donetsk Oblast, Ukraine, and to explore the association between the epidemics of human immunodeficiency virus (HIV) and multidrug-resistant TB (MDR-TB). METHODS: All consecutive newly diagnosed and previously treated patients with sputum smear-positive TB presenting to all TB units in Donetsk Oblast over 12 months were invited to take part in the study. A total of 1293 and 203 patients with TB were tested for HIV and MDR-TB in the civilian and penitentiary sectors, respectively. RESULTS: Of those enrolled for the study, 307 were HIV-positive, 379 had MDR-TB, and 97 had MDR-TB and HIV co-infection. MDR-TB rates in the civilian sector were respectively 15.5% (95%CI 13.1-17.8) and 41.5% (95%CI 36.4-46.5) in newly diagnosed and previously treated TB patients. Among prisoners, MDR-TB rates were 21.8% (95%CI 12.4-31.2) in new cases and 52.8% (95%CI 43.9-61.7) in previously treated TB cases. HIV status was significantly associated with MDR-TB (OR 1.7, 95%CI 1.3-2.3). CONCLUSIONS: High MDR-TB rates and a positive association between MDR-TB and HIV epidemics were found in Donetsk Oblast. Urgent measures to improve HIV prevention, control of drug-resistant TB and collaboration between HIV and TB control activities need to be implemented without further delay.     

Tolerability of anti-tuberculosis treatment and HIV serostatus.

SETTING: Tuberculosis (TB) is frequent in human immunodeficiency virus (HIV) infected patients, but its treatment is hampered by adverse events and paradoxical reactions. OBJECTIVE: To examine the impact of HIV infection and other factors on the risk and spectrum of adverse events related to anti-tuberculosis treatment in a prospective cohort study conducted between January 2003 and August 2004. RESULTS: Of 105 patients treated for TB, 30 were HIV-infected. The overall incidence of adverse events was 122.5 +/- 18.5 per 100 patient-years (py) and the incidence of severe adverse events was 45.2 +/- 11.3/100 py. Age >50 years (OR 2.2, 95%CI 1.01-4.8, P = 0.046) and HIV infection (OR 3.9, 95%CI 2.1-7.5, P < 0.001) were independently associated with a higher risk of adverse events. Hepatitis (30.5/100 py) and neuropathy (28.6/100 py) were the most frequent adverse events. Hepatitis C virus infection was associated with hepatitis (OR 4.2, 95%CI 1.2-15.0, P = 0.028) and neuropathy with HIV infection (OR 3.8, 95%CI 1.1-13.7, P = 0.040). CONCLUSION: Adverse reactions to anti-tuberculosis drugs are frequent. HIV infection and age >50 years are factors associated with such reactions, while hepatitis C virus infection is a risk factor for hepatitis.     

Prevalence of M. tuberculosis infection and tuberculosis disease among HIV-infected people in Spain.

OBJECTIVE: To study the prevalence of Mycobacterium tuberculosis infection (MTBI) and past/current tuberculosis (TB) among human immunodeficiency virus (HIV) infected persons in Spain. DESIGN: Longitudinal study conducted between 2000 and 2003 at 10 HIV hospital-based clinics. Data were drawn from clinical records. Associations were measured using odds ratios (ORs) and their 95% confidence intervals (95%CI). RESULTS: Of the 1242 persons who met the eligibility criteria, most were male (75%), aged <40 years (75%) and unemployed (40%). HIV infection occurred through intravenous drug use (53%), heterosexual sex (29%) and sex between men (16%). In the initial evaluation, 315 subjects had evidence of MTBI: 84 (6.8%) had a history of TB, 23 (1.8%) current TB and 208 (16.8%) latent tuberculosis infection (LTBI). MTBI was associated with male sex, age 30-49 years, contact with a TB case, homelessness, poor education, and negatively with CD4 <100 cells/mm(3). Among subjects with MTBI, past/current TB was associated with retirement/disability (OR 6, 95%CI 1.6-22.5), CD4 <200 cells/mm(3) (OR 9.7, 95%CI 3.8-24.6), viral load >55,000 copies (OR 5.3, 95%CI 1.4-20.0), and negatively, with skilled work (OR 0.4, 95%CI 0.1-1.0) or administrative/managerial/professional work (OR 0.05, 95%CI 0.01-0.4). CONCLUSION: Social context has an impact on the effectiveness of HIV and TB control programmes even in industrialised countries with free access to health care.     

INH preventive therapy among adult HIV-infected patients in Thailand.

SETTING: Two HIV/AIDS clinics in Bangkok. OBJECTIVE: Although isoniazid (INH) preventive therapy (IPT) can reduce the risk of active TB among HIV-infected individuals, preventive therapy is rarely used in developing countries. The WHO recommends INH prophylaxis for tuberculin skin test (TST) positive HIV positives or for all HIV positives in countries with a high prevalence of latent TB if TST is unfeasible. It is not known whether IPT without TST will affect adherence. DESIGN: Prior to receiving IPT, 914 HIV-infected patients in Bangkok were randomized to TST or not. Adherence, measured by self-report and pill counts, and proportion completing therapy were evaluated. RESULTS: Adherence was 84.5% and 79.7%, by self-report, and 81.8% and 73.9% by pill count, respectively, in PPD-positive and non-TST-screened subjects (adjusted OR 1.44, 95%CI 0.79-2.64 and 1.53, 95%CI 0.45-5.26). The drop-out rate before treatment was 6.3% in the TST-screened and 1.7% in the non-TST screened subjects (OR 3.93, 95%CI 1.18-16.04). CONCLUSION: TST screening was not a predictor of adherence to IPT once therapy began, but it was associated with a higher drop-out rate prior to therapy. Acceptable levels of adherence were observed with both regimens.     

Factors associated with an increased case-fatality rate in HIV-infected and non-infected South African gold miners with pulmonary tuberculosis.

SETTING: A gold mining company in the Free State Province, South Africa. AIM AND DESIGN: A retrospective cohort study to investigate factors associated with an increased case-fatality rate (CFR) at 6 months in human immunodeficiency virus (HIV) positive and negative tuberculosis (TB) patients. RESULTS: Between April 1993 and March 1997, there were 2236 men with culture-confirmed pulmonary TB in whom HIV status and treatment outcome were known. The overall CFR within the first 6 months of therapy was low (3.6%). After adjusting for confounding factors, HIV infection (OR 15.0, 95%CI 7.4-30.6), self-presentation compared to detection by the active radiological screening programme (OR 5.6, 95%CI 2.6-12.2) and presence of silicosis (OR 3.0, 95%CI 1.4-6.3) were significantly associated with an increased CFR. Opportunistic infections accounted for 56.2% (36/64) of deaths in HIV-positive men. Cryptococcal disease accounted for 75% (27/36) of deaths from opportunistic infections. CONCLUSION: HIV infection and silicosis are both powerful risk factors for TB and are associated with an increased risk of death. Strategies aimed at reducing these two risk factors within the workforce could reduce TB incidence and mortality. In settings with functional DOTS programmes and sufficient resources, expanding the DOTS programme to include active case detection should be explored as a means of reducing TB prevalence and mortality.     

Prevalence of drug-resistant tuberculosis in an HIV endemic area in northern Thailand.

SETTING: Chiang Rai Province in Northern Thailand, where human immunodeficiency virus (HIV) infection has been prevalent since the 1990s. OBJECTIVE: To observe the prevalence of drug-resistant tuberculosis (TB) and investigate the factors related to the level of drug resistance in an HIV endemic area. DESIGN: Population-based surveillance study covering the whole province. METHOD: Drug susceptibility testing was performed at the Thai Ministry of Public Health laboratory for all sputum smear-positive TB patients diagnosed in hospitals in Chiang Rai Province over a 25-month period in 1996-1998. Patient characteristics were obtained through interview by trained personnel. HIV testing was performed with informed consent. RESULTS: Among the 1077 incident patients without previous history of treatment, the proportion of patients with resistance to isoniazid was 13.2%, 10.8% to rifampicin, 15.6% to streptomycin, and 5.8% to ethambutol. Multidrug resistance (MDR), i.e., resistance to at least both isoniazid and rifampicin, was observed in 6.3%. Factors associated with primary MDR-TB were HIV positivity (OR 2.2, 95%CI 1.3-3.9), age <50 years (OR 2.0), and treatment in the provincial hospital (OR 2.3), compared to patients treated in the community and private hospitals. Stratified analysis shows a significantly high prevalence of primary MDR-TB among HIV-positive patients treated in the provincial hospital against HIV-negative patients or HIV-positive patients in other hospitals. CONCLUSION: The prevalence of primary MDR-TB in this area was high. It is necessary to strengthen TB control activities in order to reduce the burden of MDR-TB.     

Risk factors associated with default among new pulmonary TB patients and social support in six Russian regions.

SETTING: Tuberculosis (TB) services in six Russian regions in which social support programmes for TB patients were implemented. OBJECTIVE: To identify risk factors for default and to evaluate possible impact of social support. METHODS: Retrospective study of new pulmonary smear-positive and smear-negative TB patients registered during the second and third quarters of the 2003. Data were analysed in a case-control study including default patients as cases and successfully treated patients as controls, using multivariate logistic regression modelling. RESULTS: A total of 1805 cases of pulmonary TB were enrolled. Default rates in the regions were 2.3-6.3%. On multivariate analysis, risk factors independently associated with default outcome included: unemployment (OR 4.44; 95%CI 2.23-8.86), alcohol abuse (OR 1.99; 95%CI 1.04-3.81), and homelessness (OR 3.49; 95%CI 1.25-9.77). Social support reduced the default outcome (OR 0.13; 95%CI 0.06-0.28), controlling for age, sex, region, residence and acid-fast bacilli (AFB) smear of sputum. CONCLUSION: Unemployment, alcohol abuse and homelessness were associated with increased default outcome among new TB patients, while social support for TB patients reduced default. Further prospective randomised studies are necessary to evaluate the impact and to determine the most cost-effective social support for improving treatment outcomes of TB in patients in Russia, especially among populations at risk of default.     

结核病与艾滋病低流行地区MTB/HIV双重感染患者发现模式的效果评价

目的 回顾性分析上海市近10年在结核病患者与HIV/AIDS人群中对HIV抗体和活动性结核病双向筛查的数据,评价MTB/HIV双重感染患者发现模式的效果,为进一步完善相关政策提供依据。 方法 通过《中国结核病信息管理系统》收集2012—2020年结核病患者(68155例)HIV抗体检测结果及结核病诊断、治疗相关资料;通过《结核菌/艾滋病病毒双重感染防治管理工作年度报表》收集2012—2020年HIV/AIDS人群接受结核病相关检查情况。采用线性回归模型评价筛查阳性率随年度的变化趋势,并计算年度变化百分比(APC)和需筛查人数(NNS),评价筛查效果;采用单因素方差分析和多因素logistic回归分析评价2012—2019年上海市长宁区、浦东新区10769例肺结核患者中HIV阳性的影响因素。 结果 2012—2020年上海市累积发现MTB/HIV双重感染患者308例,其中新确诊HIV感染者64例,占全部MTB/HIV双重感染患者的20.78%。2012—2020年间,结核病患者中HIV抗体检测阳性率由2.42%(32/1322)下降到0.50%(20/3995),总体呈下降趋势(APC=-16.64,t=-7.007,P<0.001);HIV/AIDS人群中活动性结核病确诊率由1.02%(50/4912)下降到0.21%(25/11878),同样呈下降趋势(APC=-14.27,t=-4.038,P=0.005)。多因素logistic回归分析显示,男性[OR(95%CI)=5.386(2.306~12.581)],年龄36~75岁[36~45、46~55、56~65、66~75岁OR(95%CI)值分别为26.243(3.230~213.244)、32.736(3.993~268.358)、20.309(2.482~166.144)、13.461(1.692~107.059)],在结核病治疗过程中死亡[OR(95%CI)=14.875(3.192~69.312)],并发肺外结核[OR(95%CI)=3.451(1.607~7.409)]是MTB/HIV双重感染的危险因素。 结论 上海市目前采取的 MTB/HIV双重感染患者发现模式取得了较好的效果,结核病患者的HIV阳性率和HIV/AIDS人群的活动性结核病确诊率均迅速下降。男性、年龄36~75岁、在治疗过程中死亡、并发肺外结核是MTB/HIV双重感染的危险因素。     

Yield of tuberculin screening among injection drug users.

BACKGROUND: Regardless of their HIV status, injection drug users (IDUs) are at increased risk of developing active tuberculosis (TB) if they have latent TB infection (LTBI). We quantified the prevalence and predictors of LTBI and level of adherence to medical evaluation in a population of IDUs in Montreal. METHODS: Participants were recruited from an ongoing dynamic cohort of IDUs followed for HIV seroconversion risk behaviour. Subjects with a tuberculin skin test (TST) of > or =5 mm were referred to designated TB clinics for medical evaluation. A financial incentive was provided for TST readings. RESULTS: Of the 262 subjects tested, 246 (94%) returned for TST reading. The overall prevalence of positive TSTs was 22% (5% in HIV-positive, 28% in HIV-negative participants). Older age at first injection drug use (OR per 10 year increase in age 1.4, 95%CI 1.2-1.8), duration of injection drug use (OR per 10 year increase 1.6, 9.5%CI 1.5-2.2) and negative HIV status (OR 11.2, 95%CI 3.2-4.0) were independent predictors of a positive TST. Nine per cent of all TST-positive participants completed LTBI treatment. CONCLUSION: TB screening activities with incentives can be successful in detecting TST-positive individuals, but better strategies are needed for medical follow-up in this high-risk group.     

Causes and costs of hospitalization of tuberculosis patients in the United States.

OBJECTIVE: To examine the costs, lengths of stay and patient characteristics associated with tuberculosis (TB) hospitalizations. METHODS: A prospective cohort study of 1493 TB patients followed from diagnosis to completion of therapy at 10 public health programs and area hospitals in the US. The main outcome measures were the following: 1) occurrence, 2) cost, and 3) length of stay of TB-related hospitalizations. RESULTS: There were 821 TB-related hospitalizations among the study participants; 678 (83%) were initial hospitalizations and 143 (17%) were hospitalizations during the treatment of TB. Patients infected with human immunodeficiency virus (HIV) (OR 1.8, 95% CI 1.2-2.6), and homeless patients (OR, 1.7 95% CI 1.1-2.8) were at increased risk of being hospitalized at diagnosis. Homeless patients (RR 2.5, 95%CI 1.5-4.3), patients who used alcohol excessively (RR 1.9, 95% CI 1.2-3.0), and patients with multidrug-resistant TB (RR 5.7, 95% CI 2.7-11.8) were at increased risk of hospitalization during treatment. The median length of stay varied from 9 to 17 days, and median costs per hospitalization varied from $6441 to $12968 among the sites. CONCLUSION: Important social factors, HIV infection, and local hospitalization practice patterns contribute significantly to the high cost of TB-related hospitalizations. Efforts to address these specific factors are needed to reduce the cost of preventable hospitalizations.     

An evaluation of symptom and chest radiographic screening in tuberculosis prevalence surveys.

SETTING: A tuberculosis (TB) prevalence survey was performed in 2002 in two urban communities in Cape Town, South Africa. The population was 36,334 in 2001, and the TB notification rate was 341 per 100,000 population for new smear-positive TB in 2002. OBJECTIVE: To evaluate the relative contributions of symptom and chest radiographic (CXR) screening in the detection of subjects with smear- and/or culture-positive TB in prevalence surveys. DESIGN: Information on symptoms, CXR abnormalities, sputum smear and culture was gathered from a random cluster sample of 1170 adults (aged > or = 15 years). Smear and/or culture-positive TB was used as the gold standard. RESULTS: Of 1170 adults, 29 had bacteriologically positive TB (smear- and/or culture-positive). The presence of any abnormalities on CXR had the highest sensitivity for detecting subjects with bacteriologically positive TB (0.97, 95%CI 0.90-1.00). Specificity for any abnormalities on CXR was 0.67 (95%CI 0.64-0.70). The specificity of any of five TB-related symptoms was 0.68 (95%CI 0.65-0.71). Individual symptoms had low sensitivities, ranging from 0.10 for fever to 0.54 for cough of > or = 2 weeks. CONCLUSION: In this TB prevalence survey, CXR screening, but not symptom screening, was a sensitive alternative to sputum examination of all participants.     

Tuberculin skin testing to assess the occupational risk of Mycobacterium tuberculosis infection among health care workers in Abidjan, C?te d'Ivoire.

SETTING: Tuberculin skin test (TST) survey of health care workers (HCWs) in selected clinical services in Abidjan, C?te d'Ivoire. OBJECTIVE: To assess whether HCWs in Abidjan are at increased risk for occupationally acquired Mycobacterium tuberculosis infection. DESIGN: From October 1996 to January 1997, consenting HCWs from four services where tuberculosis (TB) prevalence among patients was high and two services where it was low were evaluated with a questionnaire, TST (including evaluation of anergy) and chest radiograph. RESULTS: Of the 512 participants, 405 (79%) had a TST reaction of > or =10 mm, eight (2%) were anergic, five (1%) had a radiograph compatible with TB, and two had confirmed TB. Using a cut-off of 10 mm, we found a higher prevalence of TST positivity in services with high TB prevalence than in those with low TB prevalence (92% vs 72%; odds ratio [OR] 4.3; 95% confidence interval [CI] 2.3-8.0]) and among HCWs with direct (87%; OR 2.9; 95%CI 1.6-5.1) and indirect patient contact (80%, OR 1.7; 95%CI 1.0-2.3) than among those with minimal patient contact (69%). CONCLUSION: These findings indicate that TST positivity among HCWs is related to level of exposure to TB patients, and suggest that HCWs in Abidjan are at risk for the nosocomial transmission of TB.     

The association between hepatitis C virus and HIV-1 in preparatory cohorts for HIV vaccine trials in Thailand

OBJECTIVES: To study the association between hepatitis C virus (HCV) and HIV-1, and HCV seropositivity as an indicator of HIV-1 risk behavior for HIV vaccine preparatory cohorts in Thailand. DESIGN: Cross-sectional study of HIV-1-infected persons identified at screening for potential HIV vaccine trial cohort studies. METHODS: Sera from HIV-1-infected and uninfected volunteers was matched by age, sex, and community, and tested for HCV reactivity. Logistic regression methods were used to measure associations between HIV-1, HCV and other risk factors for HIV infection. RESULTS: The prevalence of HCV among HIV-negative controls was 8.3% (6/72) for men and 4.2% (5/118) for women. Co-infection with HIV and occurred in 50.7% (37/73) of men and 3.4% (4/118) of women. Among men who reported injection drug use (IDU), 96.4% (27/28) were HCV seropositive. No women reported IDU. HCV was associated with HIV infection [odds ratio (OR), 11.3; 95% confidence interval (CI), 4.4-29.3] and IDU (OR, 12.0; 95% CI, 3.4-41.9) among men, but not women (OR, 0.8; 95% CI, 0.2-3.0). After adjustment for potential confounding, HCV, but not IDU, remained strongly associated with HIV-1 infection among men (OR, 9.4; 95% CI, 2.7-32.6). CONCLUSIONS: The strong associations between HCV seropositivity, HIV-1 infection, and IDU history suggest that IDU was reported accurately in this study. The surprisingly high prevalence of HCV among HIV-1-infected young men may assist health policy makers in the choice of behavioral interventions for this important subgroup of the population.     

5' dinucleotide repeat polymorphism of NRAMP1 and susceptibility to tuberculosis among Caucasian patients in Houston, Texas.

SETTING: Houston Tuberculosis Initiative (HTI) and Baylor College of Medicine, Houston, Texas. OBJECTIVE: To further explore the association between the polymorphisms of NRAMP1 and human susceptibility/resistance to tuberculosis (TB), specifically to determine whether the reported association shown for blacks and Asians holds true for Caucasian populations. DESIGN: In a case-control study, 135 adult Caucasian TB patients and 108 adult Caucasian HIV-seronegative non-TB controls were analyzed for the association between the polymorphisms in NRAMP1 gene and clinical TB. RESULTS: Heterozygote at 5'(GT)n, a dinucleotide repeat polymorphism in the promoter of NRAMP1, was observed at significantly higher frequencies among HIV-negative patients with pulmonary TB (41.6%; OR 2.02; 95%CI 1.11-3.64), extra-pulmonary TB (66.7%; OR 4.80; 95%CI 1.34-17.15), and HIV-seropositive TB patients (50%; OR 3.77; 95%CI 1.33-10.66) in comparison with the controls (27.8%). Homozygotes (GT)(10,10) were over-represented among HIV-positive TB patients (18.2%; OR 6.86; 95%CI 1.55-30.21) compared to the controls (5.5%). CONCLUSION: These findings suggest that the 5'(GT)n polymorphism of NRAMP1 modifies TB susceptibility in this Caucasian population, and could possibly be related to the site of infection among HIV-negative individuals and HIV-coinfected TB.     

TB prevention in HIV clinics in New York City.

SETTING: Ten hospital-based human immunodeficiency virus (HIV) clinics in New York City. OBJECTIVE: To evaluate tuberculosis (TB) prevention in HIV clinics based on the prevalence and incidence of TB and the efficacy of preventive therapy with isoniazid (INH). DESIGN: The medical records of 2393 HIV-infected patients with a first clinic visit in 1995 were reviewed retrospectively. Deaths and TB cases through December 1997 were ascertained through a match with the TB and AIDS registries. RESULTS: At first visit, 92 patients (4%) had a history of TB, 98 (4%) were being treated for TB, and six (<1%) were diagnosed with TB. During follow-up, 23 cases were diagnosed, an incidence of 0.53 per 100 person-years (py) (95%CI 0.34-0.77). Among 439 tuberculin skin test (TST) positive patients, the incidence of TB/100 py was 1.63 (95%CI 0.27-5.02) in patients with no INH, 1.28 (95%CI 0.40-2.98) in patients with <12 months of INH, and 1.06 (95%CI 0.38-2.28) in patients with 12 months of INH. The incidence/100 py was 0.0 (95%CI 0.0-0.78) in TST-negative patients and 0.37 (95%CI 0.09-0.95) in anergic patients. The relative risk of TB was 0.65 (95%CI 0.14-4.56) in TST-positive patients with 12 months of INH (vs. none). CONCLUSIONS: The benefits of TB prevention efforts in these HIV clinics from 1995 to 1997 were limited because most TB occurred before the first clinic visit. Methods for reaching HIV-infected patients earlier should be identified.     

Diabetes mellitus is strongly associated with tuberculosis in Indonesia.

SETTING: Diabetes mellitus is a known risk factor for tuberculosis (TB), but no studies have been reported from South-East Asia, which has a high burden of TB and a rapidly growing prevalence of diabetes. OBJECTIVE: To examine if and to what extent diabetes is associated with an increased risk of TB in an urban setting in Indonesia. DESIGN: Case-control study comparing the prevalence of diabetes mellitus (fasting blood glucose level >126 mg/dl) among newly diagnosed pulmonary TB patients and matched neighbourhood controls. RESULTS: Patients and control subjects had a similar age (median 30 years) and sex distribution (52% male), but malnutrition was more common among TB patients (median body mass index 17.7 vs. 21.5 kg/m2). HIV infection was uncommon (1.5% of patients). Diabetes mellitus was present in 60 of 454 TB patients (13.2%) and 18 of 556 (3.2%) control subjects (OR 4.7; 95%CI 2.7-8.1). Adjustment for possible confounding factors did not reduce the risk estimates. Following anti-tuberculosis treatment, hyperglycaemia reverted in a minority (3.7%) of TB patients. CONCLUSION: Diabetes mellitus is strongly associated with TB in young and non-obese subjects in an urban setting in Indonesia. This may have implications for TB control and patient care in this region.     

The validity of HIV testing using sputum from suspected tuberculosis patients, Botswana, 2001.

SETTING: The World Health Organization recommends that sentinel HIV surveillance be conducted on tuberculosis patients. However, serum HIV testing is complicated in the TB clinic context, and may not be acceptable to patients. DESIGN: To determine the utility of the OraQuick HIV-1/2 Assay for the detection of HIV antibodies in sputum, we consecutively enrolled adult in-patients in Botswana who had sputum sent for acid-fast bacilli testing and serum sent for HIV ELISA testing. OraQuick HIV-1/2 Assay was applied to gingival secretions according to manufacturer's guidelines, and was also dipped into sputum specimens. A subset of 60 sputum specimens was also serially tested up to 72 hours after collection. RESULTS: Of 377 patients, 84% were HIV-positive by serum ELISA. Compared with serum ELISA, the OraQuick HIV-1/2 Assay detected HIV in gingival secretions with 98.4% sensitivity and 98.3% specificity (95%CI 97-99 and 92-100, respectively), and 97.1% sensitivity and 98.3% specificity on initial sputum specimens (95%CI 95-99 and 92-100, respectively). OraQuick HIV-1/2 Assay performance on sputum declined slightly when tested up to 72 hours after collection. CONCLUSIONS: When applied to sputum specimens, the OraQuick HIV-1/2 Assay demonstrates sensitivity and specificity comparable to its intended application on gingival secretions. This novel testing method will be valuable in anonymous sentinel HIV surveillance surveys among tuberculosis patients.     

Contact screening and latent TB infection treatment in Singapore correctional facilities.

SETTING: Singapore, a city-state with a tuberculosis (TB) incidence rate of 47 per 100000 population in 2000. OBJECTIVES: 1) To report our experience with contact investigation and latent TB infection (LTBI) treatment in high-risk contacts with unknown human immunodeficiency virus (HIV) status in correctional facilities (CFs) (prisons/drug rehabilitation centres); and 2) to compare the yield of contact screening in this setting with that in the community (household/family) setting. METHODS: The tuberculin skin test (TST) readings of 704 CF contacts screened from 1999 to 2001 were compared with those of 2729 household/family contacts who underwent screening in 2000. RESULTS: Respectively eight (1.1%) and 20 (0.7%) active TB cases were detected among the CF and community contacts. A significantly higher proportion of CF contacts had first (non-conversion) TST readings > or =15 mm (39% vs. 22%, OR 2.3; 95%CI 1.9-2.7; P < 0.001), and 10-14 mm (26% vs. 18%, OR 1.6; 95%CI 1.3-2.0; P < 0.001) and TST conversion (43% vs. 20%, OR 2.9; 95%CI 1.7-4.9; P < 0.001). LTBI treatment was started in 65% of the CF contacts screened; 87% completed treatment. CONCLUSION: We found a high LTBI rate among CF contacts, presenting an opportunity for intervention.     

Tuberculosis risk among staff of a large public hospital in Kenya

SETTING: In sub-Saharan Africa, high rates of tuberculosis (TB) and human immunodeficiency virus (HIV) infection pose a serious threat for occupationally acquired TB among health care workers. OBJECTIVE: To identify factors associated with TB disease among staff of an 1800-bed hospital in Kenya. DESIGN: We calculated TB incidence among staff and conducted a case-control study where cases (n = 65) were staff diagnosed with TB and controls (n = 316) were randomly selected staff without recent TB. RESULTS: The annual incidence of TB from 2001 to 2005 ranged from 645 to 1115 per 100000 population. Factors associated with TB disease were additional daily hours spent in rooms with patients (adjusted odds ratio [aOR] 1.3, 95%CI 1.2-1.5), working in areas where TB patients received care (aOR 2.1, 95%CI 1.1-4.2), HIV infection (aOR 29.1, 95%CI 5.1-167) and living in a slum (aOR 4.7, 95%CI 1.8-12.5) or hospital-provided low-income housing (aOR 2.6, 95%CI 1.2-5.6). CONCLUSION: Hospital exposures were associated with TB disease among staff at this hospital regardless of their job designation, even after controlling for living conditions, suggesting transmission from patients. Health care facilities should improve infection control practices, provide quality occupational health services and encourage staff testing for HIV infection to address the TB burden in hospital staff.