Knowledge and Practice of the Referral System under the National Health Insurance Scheme among Medical and Dental Practitioners of A Large-Accredited Facility in Kano, Nigeria.

BACKGROUND: Studies on healthcare professionals' knowledge about the National Health Insurance Scheme (NHIS) are scarce. Therefore, we assessed the knowledge and practice of the NHIS referral system among Medical and Dental practitioners in a tertiary hospital in Northwest Nigeria. METHODS: This cross-sectional study involved 242 medical and dental practitioners randomly selected from nine departments for over 6-weeks. A structured self-administered questionnaire was used to collect data. Data were analyzed using descriptive and inferential statistics. RESULTS: The respondents' mean age was 35.7±6.0 years; they were predominantly males (64.9%). Their mean overall knowledge score was 58.9±23.0%, with 66.9% of respondents having inadequate overall knowledge of the NHIS referral system. Practice department (Fishers 2 exact, P=0.0019), perceived knowledge of the referral system (ꭓ =8.169, P=0.004), and having been referred as an enrolee (ꭓ2 = 6.358, P=0.012) were associated with overall-knowledge. Obstetrics-and-Gynaecology (odds ratio[OR]=0.29, 95% confident interval [CI] [0.88-0.98]), Dental and-Maxillofacial-Surgery (OR=0.08, 95%CI[0.01-0.98]), and Otorhinolaryngology (OR=0.18, 95%CI[0.04-0.80]) respondents were less likely to have adequate overall-knowledge.Although 56.2%, 50.4%, 20.7%, and 89.7% were enrolees, had received treatment as enrolees, had been referred as enrolees and treated other enrolees, respectively, an unimpressive proportion had sighted a referral letter (64.9%) or authorization code on the letter (25.2%), referred an enrolee from their department previously (51.2%) or used the NHIS referral form to write referrals (38.8%). CONCLUSION: The overall knowledge of the NHIS referral system was inadequate. The practice of the referral system was below expectation. Therefore, training medical and dental practitioners on the NHIS referral system is necessary. Training should target those who are least likely to have adequate overall knowledge.

CONTEXTE: Les études sur les connaissances des professionnels de la santé concernant le Régime d'assurance maladie national (NHIS) sont rares. Nous avons donc évalué les connaissances et la pratique du système de référence du NHIS parmi les médecins et dentistes d'un hôpital tertiaire du Nord-Ouest du Nigeria. MÉTHODES: Cette étude transversale a impliqué 242 médecins et dentistes sélectionnés de manière aléatoire dans neuf départements pendant plus de 6 semaines. Un questionnaire structuré auto-administré a été utilisé pour recueillir des données. Les données ont été analysées à l'aide de statistiques descriptives et inférentielles. RÉSULTATS: L'âge moyen des répondants était de 35,7 ± 6,0 ans ; ils étaient principalement des hommes (64,9 %). Leur score moyen global de connaissances était de 58,9 ± 23,0 %, avec 66,9 % des répondants ayant une connaissance globale insuffisante du système de référence du NHIS. Le département de pratique (test exact de Fisher, P=0,0019), la connaissance perçue du système de référence (ꭓ 2 =8,169, P=0,004) et avoir été référé en tant qu'adhérent (ꭓ 2 = 6,358, P=0,012) étaient associés à la connaissance globale. Les répondants en obstétrique-gynécologie (rapport des cotes [OR]=0,29, intervalle de confiance à 95 % [IC] [0,88-0,98]), en chirurgie dentaire et maxillo-faciale (OR=0,08, IC à 95 % [0,01-0,98]), et en oto-rhino-laryngologie (OR=0,18, IC à 95 % [0,04-0,80]) étaient moins susceptibles d'avoir une connaissance globale adéquate. Bien que 56,2 %, 50,4 %, 20,7 % et 89,7 % étaient adhérents, avaient reçu un traitement en tant qu'adhérents, avaient été référés en tant qu'adhérents et avaient traité d'autres adhérents, respectivement, une proportion peu impressionnante avait vu une lettre de référence (64,9 %) ou un code d'autorisation sur la lettre (25,2 %), avait référé un adhérent de leur département précédemment (51,2 %) ou avait utilisé le formulaire de référence du NHIS pour écrire des références (38,8 %). CONCLUSION: La connaissance globale du système de référence du NHIS était insuffisante. La pratique du système de référence était en deçà des attentes. Par conséquent, la formation des médecins et dentistes sur le système de référence du NHIS est nécessaire. La formation devrait cibler ceux qui sont moins susceptibles d'avoir une connaissance globale adéquate. MOTS-CLÉS: Connaissances et Pratiques, Professionnels de la santé, Régime national d'assurance maladie, Nigeria, Renvoi.

Outcome of Community-Based Antiretroviral Drug Refill among Stable Human Immunodeficiency Virus Patients Accessing Care at a Tertiary Center in Abuja, Nigeria: A 3-Year Review.

INTRODUCTION: Community-based delivery of antiretroviral therapy (ART) is an innovative approach that delivers HIV treatment services closer to the people, removing logistical barriers to clinic access, thereby improving ART uptake and retention in care. The United States Emergency Plan for AIDS Relief (PEPFAR) program in Nigeria involved community-based private sector pharmacies to expand uptake of ART. We aimed at evaluating the effectiveness of this innovation by comparing the CD4 cell count, weight and viral load of stable HIV patients before and after they were devolved to community pharmacies. METHODOLOGY: This study was a facility-based retrospective study that analysed the data of HIV patients accessing care at the University of Abuja Teaching Hospital (UATH) Gwagwalada, Abuja, who were devolved to community pharmacies from June 2018 to May 2021. We compared their mean CD4 cell count, weight and viral load before they were devolved and 1 year after devolvement. RESULTS: A total of 171 patients who met the eligibility criteria were devolved to community pharmacies during the study period. Majority (67.3%) of the patients were females. The age range was 24 years to 72 years with a median age of 42.8 years [inter-quartile range (IQR) 32, 62]. Their mean CD4 cell count (p=0.001) and weight (p=0.006) were higher after devolvement to community pharmacies compared to when they were at the clinic. They all maintained viral suppression after devolvement. CONCLUSION: ART refill through community pharmacies is effective in maintaining viral suppression in stable HIV patients and may lead to increase in CD4 cell count and weight.

INTRODUCTION: La prestation communautaire de la thérapie antirétrovirale (TAR) est une approche innovante qui permet de fournir des services de traitement du VIH plus près des gens, en éliminant les obstacles logistiques à l'accès aux cliniques, améliorant ainsi l'adoption de la TAR et la rétention dans les soins. Le programme du Plan d'urgence des États-Unis pour la lutte contre le sida (PEPFAR) au Nigéria a fait appel à des pharmacies communautaires du secteur privé pour développer l'utilisation du TAR. Nous avons cherché à évaluer l'efficacité de cette innovation en comparant le nombre de cellules CD4, le poids et la charge virale de patients VIH stables avant et après leur dévolution aux pharmacies communautaires. MÉTHODOLOGIE: Cette étude est une étude rétrospective basée sur l'établissement qui a analysé les données des patients VIH accédant aux soins à l'hôpital universitaire d'Abuja (UATH) Gwagwalada, Abuja, qui ont été dévolus aux pharmacies communautaires de juin 2018 à mai 2021. Nous avons comparé leur nombre moyen de cellules CD4, leur poids et leur charge virale avant leur dévolution et 1 an après la dévolution. RÉSULTATS: Un total de 171 patients répondant aux critères d'éligibilité ont été dévolus aux pharmacies communautaires pendant la période d'étude. La majorité (67,3 %) des patients étaient des femmes. La fourchette d'âge allait de 24 à 72 ans avec un âge médian de 42,8 ans [intervalle interquartile (IQR) 32, 62]. Leur nombre moyen de cellules CD4 (p=0,001) et leur poids (p=0,006) étaient plus élevés après le transfert vers les pharmacies communautaires que lorsqu'ils étaient à la clinique. Ils ont tous maintenu une suppression virale après la dévolution. CONCLUSION: Le renouvellement de l'ART par les pharmacies communautaires est efficace pour maintenir la suppression virale chez les patients VIH stables et peut conduire à une augmentation du nombre de cellules CD4 et du poids. Mots clés: Thérapie antirétrovirale, pharmacies communautaires, VIH, suppression virale, numération des CD4, poids.

Prevalence of Doppler-Derived Left Ventricular Diastolic Dysfunction Among Newly Diagnosed Hypertensive Patients.

BACKGROUND: The initial sign of hypertensive heart disease (HHD) is left ventricular diastolic dysfunction (LVDD), which is caused by remodeling of the left ventricle and left atrium, resulting in impaired relaxation of the left ventricle. LVDD is also partly due to left ventricular hypertrophy (LVH). If left untreated, LVDD can progress to diastolic heart failure and systolic heart failure. In Western countries, the prevalence of LVDD in long-term hypertensive patients ranges from 40.3% to 60%, but it is more common among hypertensive Nigerians. Since systemic hypertension can be asymptomatic in the early stages, it is important to evaluate LVDD early and control blood pressure to slow down its progression. AIMS AND OBJECTIVES: The study aims to highlight the prevalence of LVDD and to determine the stages of LVDD among newly diagnosed hypertensive patients at the University of Maiduguri Teaching Hospital (UMTH). METHOD: The study design is a hospital-based, cross-sectional, observational study. The study population consists of 352 consecutive treatment Naïve hypertensive adult patients aged 18 years and above who presented to the Cardiology Clinic of UMTH from June 2019 to June 2021. The study used the diagnostic criteria for LVDD and LVH which were based on the American Society of Echocardiography and the European Association of Cardiovascular Imaging. RESULTS: A total of 352 newly diagnosed hypertensive patients were recruited, with a mean age of 50.9 ± 11.8 years, and 54.3% were female. The majority of patients (63.6%) were overweight or obese, with a mean body mass index (BMI) of 28.5 ± 4.6 kg/m2. The mean systolic blood pressure (SBP) was 155.7 ± 16.9 mmHg, and the mean diastolic blood pressure (DBP) was 92.8 ± 10.8 mmHg. LVDD was found in 58.5% of the patients, with stage 1 LVDD being the most common (42.6%), followed by stage 2 LVDD (15.9%). The prevalence of LVDD was significantly higher in females compared to males. Patients with LVDD were significantly older and had higher BMI, higher systolic and DBP, higher pulse pressure, higher LAVI, and higher LVMI compared to those without LVDD (P < 0.05). CONCLUSION: LVDD is highly prevalent among newly diagnosed hypertensive patients, with stage 1 being the most common. Female gender, older age, higher BMI, higher blood pressure, higher LAVI, and higher LVMI were significant predictors of LVDD. Early detection and appropriate management of LVDD may help to prevent adverse cardiovascular outcomes in hypertensive patients.

Enhanced birefringence in conventional and hybrid anti-resonant hollow-core fibers.

A hollow-core anti-resonant fiber (HC-ARF) design based on hybrid silica/silicon cladding is proposed for single-polarization, single-mode and high birefringence. We show that by adding silicon layers in a semi-nested HC-ARF, one of the polarization states can be strongly suppressed while simultaneously maintaining low propagation loss for other polarization states, single-mode and high birefiringence. The optimized HC-ARF design exhibits propagation loss, high birefringence, and polarization-extinction ratio of 0.05 dB/m, 0.5 × 10-4, >300 respectively for y-polarization while the loss of x-polarization is >5 dB/m at 1064 nm. The fiber also has low bend-loss and thus can be coiled to a small bend radii of 5 cm having ≈0.06 dB/m bend loss.

Thermally tunable dispersion modulation in a chalcogenide-based hybrid optical fiber.

A hybrid optical fiber comprising metal electrodes, high performance polymers, and a highly nonlinear glass core is presented in this work as a novel, to the best of our knowledge, platform for mid-infrared nonlinear devices. The fiber allows for electrical tuning of the temperature by joule heating using a set of embedded tungsten wires. Unlike temperature tuning by an external heater, this results in a strong modulation, which introduces alternating signs of its dispersion. Enhanced spectral broadening through supercontinuum generation in the mid-infrared due to this modulation is investigated numerically.

Multi-wavelength high-energy gas-filled fiber Raman laser spanning from 1.53 µm to 2.4 µm.

In this work, we present a high-pulse-energy multi-wavelength Raman laser spanning from 1.53 µm up to 2.4 µm by employing the cascaded rotational stimulated Raman scattering effect in a 5 m hydrogen (H2)-filled nested anti-resonant fiber, pumped by a linearly polarized Er/Yb fiber laser with a peak power of ∼13kW and pulse duration of ∼7ns in the C-band. The developed Raman laser has distinct lines at 1683 nm, 1868 nm, 2100 nm, and 2400 nm, with pulse energies as high as 18.25 µJ, 14.4 µJ, 14.1 µJ, and 8.2 µJ, respectively. We demonstrate how the energy in the Raman lines can be controlled by tuning the H2 pressure from 1 bar to 20 bar.

An open label, randomised controlled trial of rifapentine versus rifampicin based short course regimens for the treatment of latent tuberculosis in England: the HALT LTBI pilot study.

BACKGROUND: Ending the global tuberculosis (TB) epidemic requires a focus on treating individuals with latent TB infection (LTBI) to prevent future cases. Promising trials of shorter regimens have shown them to be effective as preventative TB treatment, however there is a paucity of data on self-administered treatment completion rates. This pilot trial assessed treatment completion, adherence, safety and the feasibility of treating LTBI in the UK using a weekly rifapentine and isoniazid regimen versus daily rifampicin and isoniazid, both self-administered for 12 weeks. METHODS: An open label, randomised, multi-site pilot trial was conducted in London, UK, between March 2015 and January 2017. Adults between 16 and 65 years with LTBI at two TB clinics who were eligible for and agreed to preventative therapy were consented and randomised 1:1 to receive either a weekly combination of rifapentine/isoniazid ('intervention') or a daily combination of rifampicin/isoniazid ('standard'), with both regimens taken for twelve weeks; treatment was self-administered in both arms. The primary outcome, completion of treatment, was self-reported, defined as taking more than 90% of prescribed doses and corroborated by pill counts and urine testing. Adverse events were recorded. RESULTS: Fifty-two patients were successfully enrolled. In the intervention arm 21 of 27 patients completed treatment (77.8, 95% confidence interval [CI] 57.7-91.4), compared with 19 of 25 (76.0%, CI 54.9-90.6) in the standard of care arm. There was a similar adverse effect profile between the two arms. CONCLUSION: In this pilot trial, treatment completion was comparable between the weekly rifapentine/isoniazid and the daily rifampicin/isoniazid regimens. Additionally, the adverse event profile was similar between the two arms. We conclude that it is safe and feasible to undertake a fully powered trial to determine whether self-administered weekly treatment is superior/non-inferior compared to current treatment. TRIAL REGISTRATION: The trial was funded by the NIHR, UK and registered with ISRCTN ( 26/02/2013-No.04379941 ).

Spectral broadening of ultraviolet dispersive waves in gas-filled hollow-core fiber using pump pulse modulation.

UV supercontinuum laser sources based on resonant dispersive wave (RDW) generation in gas-filled hollow-core (HC) fibers offer an attractive architecture for numerous applications. However, the narrow UV spectral peak inherent to RDW generation limits the suitability for applications that require broad spectral coverage within the UV region such as spectroscopic scatterometry. In this Letter, we demonstrate how the UV spectrum can be shaped by modulating the peak power of the pump pulses driving the RDW generation, thereby creating a broadened and flattened UV spectrum. Using an argon-filled anti-resonant HC fiber, we generate a UV spectrum with a center wavelength of 323.6 nm with an FWHM of 51.7 nm, corresponding to a relative bandwidth of 16.1%.

High pulse energy and quantum efficiency mid-infrared gas Raman fiber laser targeting CO2 absorption at 4.2 µm.

In this Letter, we demonstrate a high pulse energy and linearly polarized mid-infrared Raman fiber laser targeting the strongest absorption line of ${\rm CO}_2$CO2 at $\sim{4.2}\;\unicode {x00B5} {\rm m}$∼4.2µm. This laser was generated from a hydrogen (${\rm H}_2$H2)-filled antiresonant hollow-core fiber, pumped by a custom-made 1532.8 nm Er-doped fiber laser delivering 6.9 ns pulses and 11.6 kW peak power. A quantum efficiency as high as 74% was achieved, to yield 17.6 µJ pulse energy at 4.22 µm. Less than 20 bar ${\rm H}_2$H2 pressure was required to maximize the pulse energy since the transient Raman regime was efficiently suppressed by the long pump pulses.

Protocol for a cluster randomised control trial evaluating the efficacy and safety of treatment for latent tuberculosis infection in recent migrants within primary care: the CATAPuLT trial.

BACKGROUND: The identification and treatment of LTBI is a key component of the WHO's strategy to eliminate TB. Recent migrants from high TB-incidence countries are recognised to be at risk TB reactivation, and many high-income countries have focused on LTBI screening and treatment programmes for this group. However, migrants are the group least likely to complete the LTBI cascade-of-care. This pragmatic cluster-randomised, parallel group, superiority trial investigates whether a model of care based entirely within a community setting (primary care) will improve treatment completion compared with treatment in specialist TB services (secondary care). METHODS: The CATAPuLT trial (Completion and Acceptability of Treatment Across Primary Care and the community for Latent Tuberculosis) randomised 34 general practices in London, England, to evaluate the efficacy and safety of treatment for LBTI in recent migrants within primary care. GP practices were randomised to either provide management for LTBI entirely within primary care (GPs and community pharmacists) or to refer patients to secondary care. The target recruitment number for individuals is 576. The primary outcome is treatment completion (defined as taking at least 90% of antibiotic doses). The secondary outcomes assess adherence, acceptance of treatment, the incidence of adverse effects including drug-induced liver injury, the rates of active TB, patient satisfaction and cost-effectiveness of LTBI treatment. This protocol adheres to the SPIRIT Checklist. DISCUSSION: The CATAPuLT trial seeks to provide implementation research evidence for a patient-centred intervention to improve treatment completion for LTBI amongst recent migrants to the UK. TRIAL REGISTRATION: NCT03069807, March 2017, registered retrospectively.

Discordance in latent tuberculosis (TB) test results in patients with end-stage renal disease.

OBJECTIVES: This natural experiment was designed to assess the impact of exposure to an active case of tuberculosis (TB) on a group of immunosuppressed individuals, with end-stage renal disease over an extended follow-up. STUDY DESIGN: Close contacts of people with sputum smear-positive Mycobacterium tuberculosis are at high risk of infection, particularly immunosuppressed individuals. An infectious TB healthcare worker worked in a renal dialysis unit for a month before diagnosis, with 104 renal dialysis patients, was exposed for ≥8 h. METHODS: Patients were informed and invited for screening 8-10 weeks postexposure. They either underwent standard two-step assessment with tuberculin skin test (TST) and QuantiFERON®-TB Gold (Cellestis GmbH; QFN) interferon-gamma release assay (IGRA) or after consent, enrolled in a study where these two tests were performed simultaneously with T-SPOT®-TB (Oxford Immunotec Ltd; TSPOT). Patients within the study were followed up for 2 years from exposure, with QFN and TSPOT repeated at months 3 and 6 from the first testing. RESULTS: Of 104 exposed individuals, 75 enrolled in the study. There was a high degree of discordance among QFN, TSPOT and TST. This was seen at both the first time point and also over time in subjects who were retested. No patients had active TB at the baseline testing. None received treatment for latent TB infection. Over the following 2 years, no one developed TB disease. CONCLUSION: This study suggests that there is a low risk of progression to active TB in low-incidence countries even in high-risk groups. This plus the degree of the test result discordance emphasises the complexities of managing TB in such settings as it is unclear which of these tests, if any, provides the best diagnostic accuracy.

Assessing uncertainty in the burden of hepatitis C virus: Comparison of estimated disease burden and treatment costs in the UK.

Hepatitis C virus (HCV) is a major and growing public health concern. We need to know the expected health burden and treatment cost, and understand uncertainty in those estimates, to inform policymaking and future research. Two models that have been important in informing treatment guidelines and assessments of HCV burden were compared by simulating cohorts of individuals with chronic HCV infection initially aged 20, 35 and 50 years. One model predicts that health losses (measured in quality-adjusted life-years [QALYs]) and treatment costs decrease with increasing initial age of the patients, whilst the other model predicts that below 40 years, costs increase and QALY losses change little with age, and above 40 years, they decline with increasing age. Average per-patient costs differ between the models by up to 38%, depending on the patients' initial age. One model predicts double the total number, and triple the peak annual incidence, of liver transplants compared to the other model. One model predicts 55%-314% more deaths than the other, depending on the patients' initial age. The main sources of difference between the models are estimated progression rates between disease states and rates of health service utilization associated with different disease states and, in particular, the age dependency of these parameters. We conclude that decision-makers need to be aware that uncertainties in the health burden and economic cost of HCV disease have important consequences for predictions of future need for care and cost-effectiveness of interventions to avert HCV transmission, and further quantification is required to inform decisions.

What are the most efficacious treatment regimens for isoniazid-resistant tuberculosis? A systematic review and network meta-analysis.

INTRODUCTION: Consensus on the best treatment regimens for patients with isoniazid-resistant TB is limited; global treatment guidelines differ. We undertook a systematic review and meta-analysis using mixed-treatment comparisons methodology to provide an up-to-date summary of randomised controlled trials (RCTs) and relative regimen efficacy. METHODS: Ovid MEDLINE, the Web of Science and EMBASE were mined using search terms for TB, drug therapy and RCTs. Extracted data were inputted into fixed-effects and random-effects models. ORs for all possible network comparisons and hierarchical rankings for different regimens were obtained. RESULTS: 12 604 records were retrieved and 118 remained postextraction, representing 59 studies-27 standalone and 32 with multiple papers. In comparison to a baseline category that included the WHO-recommended regimen for countries with high levels of isoniazid resistance (rifampicin-containing regimens using fewer than three effective drugs at 4 months, in which rifampicin was protected by another effective drug at 6 months, and rifampicin was taken for 6 months), extending the duration of rifampicin and increasing the number of effective drugs at 4 months lowered the odds of unfavourable outcomes (treatment failure or the lack of microbiological cure; relapse post-treatment; death due to TB) in a fixed-effects model (OR 0.31 (95% credible interval 0.12-0.81)). In a random-effects model all estimates crossed the null. CONCLUSIONS: Our systematic review and network meta-analysis highlight a regimen category that may be more efficacious than the WHO population level recommendation, and identify knowledge gaps where data are sparse. SYSTEMATIC REVIEW REGISTRATION NUMBER: PROSPERO CRD42014015025.

The prospective evaluation of the TB strain typing service in England: a mixed methods study.

BACKGROUND: In response to rising TB notification rates in England, universal strain typing was introduced in 2010. We evaluated the acceptability, effectiveness and cost-effectiveness of the TB strain typing service (TB-STS). METHODS: We conducted a mixed-methods evaluation using routine laboratory, clinic and public health data. We estimated the effect of the TB-STS on detection of false positive Mycobacterium tuberculosis diagnoses (2010-2012); contact tracing yield (number of infections or active disease per pulmonary TB case); and diagnostic delay. We developed a deterministic age-structured compartmental model to explore the effectiveness of the TB-STS, which informed a cost-effectiveness analysis. RESULTS: Semi-structured interviews explored user experience. Strain typing identified 17 additional false positive diagnoses. The TB-STS had no significant effect on contact tracing yield or diagnostic delay. Mathematical modelling suggested increasing the proportion of infections detected would have little value in reducing TB incidence in the white UK-born population. However, in the non-white UK-born and non-UK-born populations, over 20 years, if detection of latent infection increases from 3% to 13% per year, then TB incidence would decrease by 11%; reducing diagnostic delay by one week could lead to 25% reduction in incidence. The current TB-STS was not predicted to be cost-effective over 20 years (£95 628/quality-adjusted life-years). Interviews found people had mixed experiences, but identified broader benefits, of the TB-STS. CONCLUSIONS: To reduce costs, improve efficiency and increase effectiveness, we recommend changes to the TB-STS, including discontinuing routine cluster investigations and focusing on reducing diagnostic delay across the TB programme. This evaluation of a complex intervention informs the future of strain typing in the era of rapidly advancing technologies.

A multi-perspective service evaluation exploring tuberculosis contact screening attendance among adults at a North London hospital.

BACKGROUND: Non-attendance at TB contact screening clinics has been highlighted as a common phenomenon across a number of sites during recruitment to the PREDICT TB Study. This has obvious implications for the safety of patients, their communities and for NHS resources. The objective of this study was to explore why adults who have been in contact with TB do, and do not, attend their screening appointment, thereby allowing identification of interventions to reduce non-attendance. METHODS: A multi-method approach was taken using 15 questionnaires with adults who attended for screening, 15 telephone questionnaires with adults who did not attend and in-depth interviews with 8 TB nurses. Interviews were coded to trace emerging descriptive themes, then refined through an iterative process of interpretation and recoding. RESULTS: Findings from the questionnaires and interviews were categorized into three principle themes following analysis: awareness, hospital factors and leadership. These themes deconstruct the complex phenomena of patients' lack of attendance at this TB contact screening service. CONCLUSION: Recommendations related to issues of leadership, outreach services, flexibility of clinic timing and awareness amongst both the local community and GPs were made.

The impact of genomics on public health practice.

INTRODUCTION: Genomic science is developing rapidly, and engagement of public health professionals will be necessary to appraise new technologies and use them effectively. SOURCES OF DATA: We use established domains of public health and draw on the literature and expert knowledge to illustrate how genomic technologies give rise to new applications. AREAS OF AGREEMENT: Genomic technologies are useful in rare inherited disease, including population screening programmes, in health care and for surveillance, diagnosis and treatment of infectious disease. AREAS OF CONTROVERSY: It is less clear when and how genetic susceptibility testing will be used for common chronic disease prevention or protection from environmental hazards. GROWING POINTS: Developments in public health practice will be necessary to ensure rapid and effective implementation of genomic science. AREAS TIMELY FOR DEVELOPING RESEARCH: Public health researchers should address how to accelerate the implementation of genomics for health benefit in developed and developing countries.

Epidemiology of tuberculosis in big cities of the European Union and European Economic Area countries.

This cross-sectional survey aimed to examine the epidemiology of tuberculosis (TB) in European Union (EU) and European Economic Area (EEA) cities with populations greater than 500,000. National TB programme managers were asked to provide data on big city population size, total number of notified TB cases in big cities and national notification rate for 2009. A rate ratio was calculated using the big city TB notification rate as a numerator and country TB notification rate, excluding big city TB cases and population, as a denominator. Twenty of the 30 EU/EEA countries had at least one big city. Pooled rate ratios were 2.5, 1.0, and 0.7 in low-, intermediate- and high-incidence countries respectively. In 15 big cities, all in low-incidence countries, rate ratios were twice the national notification rate. These data illustrate the TB epidemiology transition, a situation whereby TB disease concentrates in big cities as national incidence falls, most likely as a result of the higher concentration of risk groups found there. This situation requires targeted interventions and we recommend that big city TB data, including information about patients' risk factors, are collected and analysed systematically, and that successful interventions are shared.

Tuberculosis control in big cities and urban risk groups in the European Union: a consensus statement.

In low-incidence countries in the European Union (EU), tuberculosis (TB) is concentrated in big cities, especially among certain urban high-risk groups including immigrants from TB high-incidence countries, homeless people, and those with a history of drug and alcohol misuse. Elimination of TB in European big cities requires control measures focused on multiple layers of the urban population. The particular complexities of major EU metropolises, for example high population density and social structure, create specific opportunities for transmission, but also enable targeted TB control interventions, not efficient in the general population, to be effective or cost effective. Lessons can be learnt from across the EU and this consensus statement on TB control in big cities and urban risk groups was prepared by a working group representing various EU big cities, brought together on the initiative of the European Centre for Disease Prevention and Control. The consensus statement describes general and specific social, educational, operational, organisational, legal and monitoring TB control interventions in EU big cities, as well as providing recommendations for big city TB control, based upon a conceptual TB transmission and control model.

A pilot cross-sectional study of non-communicable diseases in TB household contacts.

BACKGROUND: Data on the prevalence of non-communicable diseases (NCDs) in TB household contacts (HHCs) are limited, yet important to inform integrated screening and care for NCD within contact investigations. It is also unclear if screening these contacts reveals more people with NCDs than individuals in the same neighbourhood. METHOD: We conducted a pilot cross-sectional study in South Africa and Tanzania, enrolling adult HHCs of TB and individuals in neighbourhood households (controls). We inquired about known NCD and systematically measured blood pressure, and tested for spot blood glucose and haemoglobin A1c. RESULTS: We enrolled 203 adult contacts of 111 persons with TB and 160 controls. Among contacts, respectively 12.2% (95% CI 8.3-17.6) and 39.7% (95% CI 33.1-46.7) had diabetes and hypertension, compared to 14.1% (95% CI 9.2-21.0) and 44.7% (95% CI 36.9-52.7) among controls. More than half of NCDs were newly identified. We did not find a significant difference in the prevalence of at least one NCD between the two groups (OR 0.85, 95% CI 0.50-1.45, adjusted for age and sex). CONCLUSIONS: We found a high prevalence of undiagnosed NCDs among contacts, suggesting a potential benefit of integrating NCD screening and care within contact investigations. Screening in the same community might similarly find undiagnosed NCDs.

CONTEXTE: Les données sur la prévalence des maladies non transmissibles (NCD, pour l'anglais « non-communicable diseases ¼) chez les contacts familiaux (HHC, pour l'anglais « household contacts ¼) de personnes atteintes de TB sont restreintes, mais elles revêtent une grande importance pour le dépistage et la prise en charge intégrée des NCD dans le cadre des enquêtes sur les contacts. De plus, on ignore si le dépistage de ces contacts permet de détecter davantage de personnes atteintes de NCD par rapport aux les individus résidant dans le même quartier. MÉTHODE: Nous avons réalisé une étude pilote transversale en Afrique du Sud et en Tanzanie, au cours de laquelle nous avons recruté des adultes HHC de personnes atteintes de TB et des individus vivant dans les ménages voisins (témoins). Nous les avons interrogés sur les NCD connues et avons systématiquement mesuré la pression artérielle, ainsi que réalisé des tests de de glycémie et d'hémoglobine glyquée. RÉSULTATS: Un total de 203 contacts adultes de 111 personnes atteintes de TB et 160 témoins ont été répertoriés. Parmi ces contacts, respectivement 12,2% (IC à 95% 8,3­17,6) et 39,7% (IC à 95% 33,1­46,7) souffraient de diabète et d'hypertension, contre 14,1% (IC à 95% 9,2­21,0) et 44,7% (IC à 95% 36,9­52,7) chez les témoins. Plus de la moitié des NCD ont été récemment découvertes. Aucune disparité significative n'a été observée dans la prévalence d'au moins une NCD entre les deux groupes (OR 0,85 ; 95% CI 0,50­1,45, ajusté pour l'âge et le sexe). CONCLUSIONS: Nous avons observé une fréquence élevée de NCDs non diagnostiquées parmi les contacts, ce qui indique qu'il pourrait être potentiellement bénéfique d'inclure le dépistage et les soins des NCD dans les enquêtes sur les contacts. Le dépistage au sein de la même communauté pourrait également révéler des NCD non diagnostiquées.

Factors associated with being lost to follow-up before completing tuberculosis treatment: analysis of surveillance data.

Completion of treatment is key to tuberculosis control. Using national surveillance data we assessed factors associated with tuberculosis patients being lost to follow-up before completing treatment ('lost'). Patients reported in England, Wales and Northern Ireland between 2001 and 2007 who were lost 12 months after beginning treatment were compared to those who completed, or were still on treatment, using univariable and multivariable logistic regression. Of 41 120 patients, men [adjusted odds ratio (aOR) 1·29; 95% confidence interval (CI) 1·23-1·35], 15- to 44-year-olds (P<0·001), and patients with pulmonary sputum smear-positive disease (aOR 1·25, 95% CI 1·12-1·45) were at higher risk of being lost. Those recently arrived in the UK were also at increased risk, particularly those of the White ethnic group (aOR 6·39, 95% CI 4·46-9·14). Finally, lost patients had a higher risk of drug resistance (aOR 1·41, 95% CI 1·17-1·69). Patients at risk of being lost require enhanced case management and novel case retention methods are needed to prevent this group contributing towards onward transmission.