This report investigates the impact of potential misclassification of samples on HIV prevalence estimates for 23 surveys conducted from 2010-2014. In addition to visual inspection of laboratory results, we examined how accounting for potential misclassification of HIV status through Bayesian latent ...class models affected the prevalence estimates. Two types of Bayesian models were specified: a model that only uses the individual dichotomous test results and a continuous model that uses the quantitative information of the EIA (i.e., the signal-to-cutoff values). Overall, we found that adjusted prevalence estimates matched the surveys’ original results, with overlapping uncertainty intervals. This suggested that misclassification of HIV status should not affect the prevalence estimates in most surveys. However, our analyses suggested that two surveys may be problematic. The prevalence could have been overestimated in the Uganda AIDS Indicator Survey 2011 and the Zambia Demographic and Health Survey 2013-14, although the magnitude of overestimation remains difficult to ascertain. Interpreting results from the Uganda survey is difficult because of the lack of internal quality control and potential violation of the multivariate normality assumption of the continuous Bayesian latent class model. In conclusion, despite the limitations of our latent class models, our analyses suggest that prevalence estimates from most of the surveys reviewed are not affected by sample misclassification.
more
Infection prevention and control practices need to be implemented to guarantee the safety of healthcare workers and patients in healthcare settings, it is fundamental to prevent cross contamination and containment of spread of COVID 19. As of the day of this publication, the following precautions ar...e recommended for the care of patients with suspected or confirmed cases of COVID-19: - For any suspected or confirmed cases of COVID-19: standard + contact + droplet precautions. -For any suspected or confirmed cases of COVID-19 and Aerosol Generated Procedure: standard + contact + airborne precautions. - The results of the application of this evaluation tool, in addition to other tools, will provide an overview regarding compliance with the activities of prevention and control of infections associated with provision of care in acute healthcare services in a health setting, without making judgments about the individual risk of patients, nor on particular cases. By its nature, this tool is only an external diagnostic to support IPC professionals and managers to assess the gaps and take corrective measures. To provide a tool for assessment of infection prevention and control practices in isolation areas in acute healthcare settings in the context of the novel coronavirus (COVID-19). These recommendations are preliminary and subject to review as new evidence becomes available.
more