Undiagnosed Acute Viral Febrile Illnesses, Sierra Leone
ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD
Pagination or Media Count:
Sierra Leone in West Africa is in a Lassa fever hyperendemic region that also includes Guinea and Liberia. Each year, suspected Lassa fever cases result in submission of 500 700 samples to the Kenema Government Hospital Lassa Diagnostic Laboratory in eastern Sierra Leone. Generally only 30 40 of samples tested are positive for Lassa virus LASV antigen andor LASV-specific IgM thus, 60 70 of these patients have acute diseases of unknown origin. To investigate what other arthropod- borne and hemorrhagic fever viral diseases might cause serious illness in this region and mimic Lassa fever, we tested patient serum samples that were negative for malaria parasites and LASV. Using IgM-capture ELISAs, we evaluated samples for antibodies to arthropod-borne and other hemorrhagic fever viruses. Approximately 25 of LASV-negative patients had IgM to dengue, West Nile, yellow fever, Rift Valley fever, chikungunya, Ebola, and Marburg viruses but not to Crimean-Congo hemorrhagic fever virus.
- Medicine and Medical Research