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Epidemiology and aetiologies of cryptococcal meningitis in Africa, 1950–2017: protocol for a systematic review
  1. Tinashe K Nyazika1,2,3,
  2. Joseph Kamtchum Tatuene1,4,
  3. Alain Kenfak-Foguena5,
  4. Paul E Verweij3,
  5. Jacques F Meis3,6,
  6. Valerie J Robertson7,
  7. Ferry Hagen6,8
  1. 1 Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi
  2. 2 Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
  3. 3 Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
  4. 4 Brain Infections Group, Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
  5. 5 Division of Infectious Diseases, Department of Internal Medicine, Lausanne University Hospital (CHUV), Lausanne, Switzerland
  6. 6 Department of Medical Microbiology and Infectious Diseases, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands
  7. 7 Department of Medical Microbiology, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe
  8. 8 Department of Medical Mycology, Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
  1. Correspondence to Tinashe K Nyazika; tknyazika{at}gmail.com

Abstract

Introduction Cryptococcal meningitis is a neglected disease and an AIDS-defining illness, responsible for 15% of all AIDS-related deaths globally. In 2014, the estimated number of incident cryptococcal meningitis cases was 223 100, with 73% of them occurring in Africa. Currently available data on the prevalence, incidence, aetiologies and mortality of cryptococcal meningitis across Africa are sparse and of limited quality. We propose to conduct the first systematic review to summarise the epidemiological data available on cryptococcal meningitis and its aetiological causes in Africa.

Methods and analysis We will search PubMed, MEDLINE, Excerpta Medica Database, ISI Web of Science, Africa Index Medicus, Cumulative Index to Nursing and Allied Health for studies on cryptococcal meningitis published between 1st January 1950 and 31st December 2017, involving adults and/or children residing in Africa. After study selection, full text paper acquisition and data extraction, we will use validated tools and checklists to assess the quality of reporting and risk of bias for each study. Heterogeneity across studies will be assessed using the χ2 test on Cochrane’s Q statistic and a random effect meta-analysis will be used to estimate the overall prevalence, incidence density and mortality of cryptococcal meningitis across studies with similar characteristics. This protocol is prepared and presented in accordance with the 2015 Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols guidelines. Reporting of the results will be compliant with the Meta-Analysis Of Observational Studies in Epidemiology (MOOSE) guidelines.

Ethics and dissemination There is no requirement for ethical approval since we will be using data from published studies. The final report will be published in a peer-reviewed journal and further presented at conferences. This study is expected to provide useful contextual estimates needed to inform treatment policies on the African continent and assess the impact of diagnostic and prevention strategies on the burden of cryptococcal meningitis in the post antiretroviral therapy era.

PROSPERO registration number CRD42017081312.

  • cryptococcal meningitis
  • cryptococcus
  • epidemiology
  • HIV/AIDS
  • Africa

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Footnotes

  • TKN and JKT contributed equally.

  • Contributors TKN and JKT: conceived the study and drafted the manuscript. AK-F, PEV, JFM, VJR and FH: revised the manuscript. All authors approved the final version of the manuscript. TKN: is the guarantor of this systematic review protocol.

  • Competing interests None declared.

  • Patient consent Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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