Clinical Illness and Outcomes in Patients with Ebola in Sierra Leone

John S. Schieffelin, Jeffrey G. Shaffer, Augustine Goba, Michael Gbakie, Stephen K. Gire, Andres Colubri, Rachel S.G. Sealfon, Lansana Kanneh, Alex Moigboi, Mambu Momoh, Mohammed Fullah, Lina M. Moses, Bethany L. Brown, Kristian G. Andersen, Sarah Winnicki, Stephen F. Schaffner, Daniel J. Park, Nathan L. Yozwiak, Pan Pan Jiang, David KargboSimbirie Jalloh, Mbalu Fonnie, Vandi Sinnah, Issa French, Alice Kovoma, Fatima K. Kamara, Veronica Tucker, Edwin Konuwa, Josephine Sellu, Ibrahim Mustapha, Momoh Foday, Mohamed Yillah, Franklyn Kanneh, Sidiki Saffa, James L.B. Massally, Matt L. Boisen, Luis M. Branco, Mohamed A. Vandi, Donald S. Grant, Christian Happi, Sahr M. Gevao, Tom Fletcher, Robert A. Fowler, Daniel G. Bausch, Pardis C. Sabeti, S. Humarr Khan, Robert F. Garry, Lassa Fever Program KGH Lassa Fever Program

Research output: Contribution to journalArticlepeer-review

470 Citations (Scopus)

Abstract

Background

Limited clinical and laboratory data are available on patients with Ebola virus disease (EVD). The Kenema Government Hospital in Sierra Leone, which had an existing infrastructure for research regarding viral hemorrhagic fever, has received and cared for patients with EVD since the beginning of the outbreak in Sierra Leone in May 2014.

Methods

We reviewed available epidemiologic, clinical, and laboratory records of patients in whom EVD was diagnosed between May 25 and June 18, 2014. We used quantitative reverse-transcriptase–polymerase-chain-reaction assays to assess the load of Ebola virus (EBOV, Zaire species) in a subgroup of patients.

Results

Of 106 patients in whom EVD was diagnosed, 87 had a known outcome, and 44 had detailed clinical information available. The incubation period was estimated to be 6 to 12 days, and the case fatality rate was 74%. Common findings at presentation included fever (in 89% of the patients), headache (in 80%), weakness (in 66%), dizziness (in 60%), diarrhea (in 51%), abdominal pain (in 40%), and vomiting (in 34%). Clinical and laboratory factors at presentation that were associated with a fatal outcome included fever, weakness, dizziness, diarrhea, and elevated levels of blood urea nitrogen, aspartate aminotransferase, and creatinine. Exploratory analyses indicated that patients under the age of 21 years had a lower case fatality rate than those over the age of 45 years (57% vs. 94%, P=0.03), and patients presenting with fewer than 100,000 EBOV copies per milliliter had a lower case fatality rate than those with 10 million EBOV copies per milliliter or more (33% vs. 94%, P=0.003). Bleeding occurred in only 1 patient.

Conclusions

The incubation period and case fatality rate among patients with EVD in Sierra Leone are similar to those observed elsewhere in the 2014 outbreak and in previous outbreaks. Although bleeding was an infrequent finding, diarrhea and other gastrointestinal manifestations were common. (Funded by the National Institutes of Health and others.)

Original languageEnglish
Pages (from-to)2092-2100
Number of pages9
JournalNew England Journal of Medicine
Volume371
Issue number22
DOIs
Publication statusPublished - 27 Nov 2014

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