Etiology of Severe Febrile Illness in Low- and Middle-Income Countries: A Systematic Review

Namrata Prasad, David R Murdoch, Hugh Reyburn, John A Crump, Namrata Prasad, David R Murdoch, Hugh Reyburn, John A Crump

Abstract

Background: With apparent declines in malaria worldwide during the last decade and more widespread use of malaria rapid diagnostic tests, healthcare workers in low-resource areas face a growing proportion of febrile patients without malaria. We sought to describe current knowledge and identify information gaps of the etiology severe febrile illness in low-and middle-income countries.

Methods and findings: We conducted a systematic review of studies conducted in low-and-middle income countries 1980-2013 that prospectively assessed consecutive febrile patients admitted to hospital using rigorous laboratory-based case definitions. We found 45 eligible studies describing 54,578 patients; 9,771 (17.9%) had a positive result for ≥1 pathogen meeting diagnostic criteria. There were no eligible studies identified from Southern and Middle Africa, Eastern Asia, Oceania, Latin American and Caribbean regions, and the European region. The median (range) number of diagnostic tests meeting our confirmed laboratory case definitions was 2 (1 to 11) per study. Of diagnostic tests, 5,052 (10.3%) of 49,143 had confirmed bacterial or fungal bloodstream infection; 709 (3.8%) of 18,142 had bacterial zoonosis; 3,488 (28.5%) of 12,245 had malaria; and 1,804 (17.4%) of 10,389 had a viral infection.

Conclusions: We demonstrate a wide range of pathogens associated with severe febrile illness and highlight the substantial information gaps regarding the geographic distribution and role of common pathogens. High quality severe febrile illness etiology research that is comprehensive with respect to pathogens and geographically representative is needed.

Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1. PRISMA flow diagram of selection…
Fig 1. PRISMA flow diagram of selection of reports, systematic review of etiology of severe febrile illness in low- and middle-income countries, 1980–2013.
Fig 2. Febrile illness etiology study locations…
Fig 2. Febrile illness etiology study locations by United Nations population division regions in low- and middle-income countries, 1980–2013.

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