title: Epidemiological profile of the Ebola virus disease outbreak in Nigeria, July-September 2014.
abstract: BACKGROUND
  In July 2014, Nigeria experienced an outbreak of Ebola virus disease following the introduction of the disease by an ill Liberian Traveler. The Government of Nigeria with the support of Technical and Development Partners responded quickly and effectively to contain the outbreak. The epidemiological profile of the outbreak that majorly affected two States in the country in terms of person, place and time characteristics of the cases identified is hereby described.
  
  
  METHODS
  Using field investigation technique, all confirmed and probable cases were identified, line-listed and analysed using Microsoft Excel 2007 by persons, time and place.
  
  
  RESULTS
  A total of 20 confirmed and probable cases; 16 in Lagos (including the index case from Liberia) and 4 in Port Harcourt were identified. The mean age was 39.5 ± 12.4 years with over 40% within the age group 30-39 years. The most frequent exposure type was direct physical contact in 70% of all cases and 73% among health care workers. The total case-fatality was 40%; higher among healthcare workers (46%) compared with non-healthcare workers (22%). The epidemic curve initially shows a typical common source outbreak, followed by a propagated pattern.
  
  
  CONCLUSIONS
  Investigation revealed the size and spread of the outbreak and provided information on the characteristics of persons, time and place. Enhanced surveillance measures, including contact tracing and follow- up proved very useful in early case detection and containment of the outbreak.
authors.affiliation: World Health Organization, Country Office, Abuja, Nigeria.
authors.forename: Emmanuel Onunche
authors.initials: EO
authors.lastname: Musa
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Adedire
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Olawunmi
authors.initials: O
authors.lastname: Adeoye
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Peter
authors.initials: P
authors.lastname: Adewuyi
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Ndadilnasiya
authors.initials: N
authors.lastname: Waziri
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Patrick
authors.initials: P
authors.lastname: Nguku
authors.affiliation: World Health Organization, Department of Communicable Diseases, Kampala District, Uganda.
authors.forename: Miriam
authors.initials: M
authors.lastname: Nanjuya
authors.affiliation: Department of Community Medicine, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria.
authors.forename: Bisola
authors.initials: B
authors.lastname: Adebayo
authors.affiliation: World Health Organisation, Field Office, State Ministry of Health, Akure, Ondo State, Nigeria.
authors.forename: Akinola
authors.initials: A
authors.lastname: Fatiregun
authors.affiliation: World Health Organization, Country Office, Abuja, Nigeria.
authors.forename: Bassey
authors.initials: B
authors.lastname: Enya
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Chima
authors.initials: C
authors.lastname: Ohuabunwo
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja ; Department of Community Medicine, Ahmadu Bello University, Zaria, Nigeria.
authors.forename: Kabiru
authors.initials: K
authors.lastname: Sabitu
authors.affiliation: Federal Ministry of Health, Abuja, Nigeria.
authors.forename: Faisal
authors.initials: F
authors.lastname: Shuaib
authors.affiliation: Federal Ministry of Health, Abuja, Nigeria.
authors.forename: Alex
authors.initials: A
authors.lastname: Okoh
authors.affiliation: Lagos State Primary Health Care Board, Lagos, Nigeria.
authors.forename: Olukayode
authors.initials: O
authors.lastname: Oguntimehin
authors.affiliation: Rivers State Ministry of Health, Port Harcourt, Nigeria.
authors.forename: Nnanna
authors.initials: N
authors.lastname: Onyekwere
authors.affiliation: Nigeria Center for Disease Control, Abuja, Nigeria.
authors.forename: Abdulsalami
authors.initials: A
authors.lastname: Nasidi
authors.affiliation: Nigeria Field Epidemiology and Laboratory Training programme, Abuja.
authors.forename: Adebola
authors.initials: A
authors.lastname: Olayinka
mesh_terms: D000328:Adult; D016358:Contact Tracing / Q000379:methods; D004196:Disease Outbreaks; D005260:Female; D006282:Health Personnel / Q000706:statistics & numerical data*; D019142:Hemorrhagic Fever, Ebola / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission; D006801:Humans; D008297:Male; D008875:Middle Aged; D009549:Nigeria / Q000453:epidemiology; D016273:Occupational Exposure; D055815:Young Adult
keywords: Ebola virus disease outbreak; Epidemiological profile; Nigeria