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MG Dixon, MM Taylor, J Dee, A Hakim, P Cantey, T Lim, H Bah, SM Camara, CB Ndongmo, M Togba, LY Touré, P Bilivogui, M Sylla, M Kinzer, F Coronado, JE Tongren, M Swaminathan, L Mandigny, B Diallo, T Seyler, M Rondy, G Rodier, WA Perea and B Dahl
The largest recorded Ebola virus disease epidemic began in March 2014; as of July 2015, it continued in 3 principally affected countries: Guinea, Liberia, and Sierra Leone. Control efforts include contact tracing to expedite identification of the virus in suspect case-patients. We examined contact tracing activities during September 20-December 31, 2014, in 2 prefectures of Guinea using national and local data about case-patients and their contacts. Results show less than one third of case-patients (28.3% and 31.1%) were registered as contacts before case identification; approximately two thirds (61.1% and 67.7%) had no registered contacts. Time to isolation of suspected case-patients was not immediate (median 5 and 3 days for Kindia and Faranah, respectively), and secondary attack rates varied by relationships of persons who had contact with the source case-patient and the type of case-patient to which a contact was exposed. More complete contact tracing efforts are needed to augment control of this epidemic.
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Ebola, Susu people, Incubation period, Crab-eating Macaque, Viral hemorrhagic fever, Liberia, Sierra Leone, Guinea
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