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In the nearly 30 years since the inception of the Global Polio Eradication Initiative (GPEI) by the World Health Organization (WHO), polio eradication efforts have decreased the number of wild [...]

Background: The contacts of people with pulmonary tuberculosis (PTB) have a high risk of becoming infected and developing tuberculosis (TB). Our aim was to determine the incidence of TB and its risk factors in a cohort of contacts with latent TB infection (LTBI) detected through contact tracing of smear-positive PTB cases. Methods and findings: We performed a population-based retrospective cohort study including contacts that had LTBI, and were contacts of people with PTB who started treatment between 2008 and 2014. We followed up contacts until they developed TB or until the end date for follow-up (31st December 2016). We used Kaplan-Meier curves to compute incidence at 2 and 5 years, and Cox regression to compute hazard ratios (HR) and their 95% confidence intervals (CI). We analyzed 3097 close contacts of 565 PTB cases. After exclusion of 81 co-prevalent TB cases, 953 contacts had LTBI, of which 14 developed TB. Their risk of developing TB after two and five years was 0.7% (CI: 0.3–1.6) and 1.8% (CI: 1.1–3.1) respectively. Contacts who had not been referred for LTBI treatment had a 1.0% (CI: 0.2–4.0) risk at 5 years. Risk of developing TB at 5 years was 1.2% (CI: 0.5–3.0) among people who completed treatment, and 11.1% (CI: 5.1–23.3) for those who did not. Risk factors for TB were not completing LTBI treatment (HR 9.4, CI: 2.9–30.8) and being female (HR 3.5, CI: 1.1-11-3). Conclusions: LTBI treatment plays a fundamental role in decreasing the risk of developing TB. It is necessary to achieve a maximum contact tracing coverage and the highest possible compliance with LTBI treatment. [ABSTRACT FROM AUTHOR]

Introduction: The aim of the study was to describe the long-term incidence of whooping cough in a large city., Methods: Descriptive study of the cases reported in the notifiable disease registry between 1999 and 2011 in Barcelona., Results: An increase in incidence was observed, especially in children and in the year 2011. Children younger than one year still were most affected, with a specific rate of 426.87/100,000 in 2011., Conclusion: A new approach in adolescent and adult vaccination is needed to provide more protection to younger children, as well as research to assess a possible shift in the bacteria itself., (Copyright © 2012 Elsevier España, S.L. All rights reserved.)