Scientific brief
8 April 2020
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.
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National AIDS and STI Control Program
n the countries of the Region of the Americas, there are different forms of organization of health services at the first level of care. Some countries include certain laboratory, dental and diagnostic imaging practices in the first level of care, while other countries centralize these practices in t...he second and third levels of care. Consequently, so that the List of Priority Medical Devices (LPMD) could be adapted to these different forms of organization of health systems in the region of the Americas, modular lists were developed that complement the main list. In this way, to use the LPMD, only those modules that are planned to be offered in a first-level care center are selected, and it is those lists that are analyzed.
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The leishmaniases are a group of diseases caused by Leishmania spp., which occur in cutaneous, mucocutaneous and visceral forms. They are neglected tropical diseases (NTDs), which disproportionately affect marginalized populations who have limited access to health care. HIV co-infected patients with... Leishmania infection are highly infectious to sandflies, and an increase in the coinfection rate in an endemic area is likely to increase the effective infective reservoir.
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These guidelines have been prepared by the Sub directorate: Maternal Health for the guidance of health workers (doctors and midwives) providing obstetric, surgical and anaesthetic services for pregnant women in district clinics, health centres and district hospitals. These guidelines are intended fo...r use in clinics, community health centres and district hospitals where specialist services are not normally available. The guidelines deal mainly with the diagnosis and especially the management of common and serious pregnancy problems. The assumption is made that the reader has a basic knowledge and understanding about the care of pregnant women. With a few exceptions (e.g. pre-eclampsia), there is no mention of aetiology and pathogenesis of the conditions described.https://www.knowledgehub.org.za/elibrary/guidelines-maternity-care-south-africa-2016
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The speed of developing diagnostics for SARS-CoV-2, the causative agent of coronavirus disease 2019 (COVID-19), has been quite remarkable. Diagnostics have focused on nucleic acid amplification testing (NAAT) to identify infected individuals in acute-phase disease for timely implementation of mitiga...tion strategies and case management. More and more immunodiagnostics, mostly rapid diagnostic tests, are being made available as an alternative to NAATs. This type of test can be used out-of-laboratory conditions at large scale.
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NATIONAL TUBERCULOSIS AND LEPROSY PROGRAMME
A healthcare worker manual. 2nd edition
The development of this National Manual for the Management of HIV-related Opportunistic Infections and Conditions for use by health care workers at the frontline of our fight against HIV/AIDS is intended to improve their understanding of the causes, preventio...n and appropriate management of opportunistic infections and conditions in adults and adolescents (OIs in children is covered effectively in the Integrated Management of Childhood Illnesses – IMCI – materials). It is also intended to be a practical guide at the clinic level, so as to improve quality of life, treatment outcomes and survival of PLHA. Crucially, this manual uses a “symptom-based” approach to support health care workers at the most basic primary level to be able to effectively initiate the care of PLHA with OIs and refer patients as appropriate (effective triage of patients at the primary care level). The result of this will be to move the management of OIs closer to the patient while ensuring that referral links with higher-level facilities and care is cultivated.
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“Continuum of HIV services refers to a comprehensive package of HIV prevention, diagnostic, treatment, care and support services provided for people at risk of HIV infection or living with HIV and their families”
August, 2018