WHO continues to monitor the evolution of the Ebola virus disease (EVD) outbreak in Sierra Leone, Liberia, and Guinea. The Ebola epidemic trend remains precarious, with community and health-facility transmissions of infection still taking place. Between 21 and 23 July 2014, 96 new cases and 7 deaths were reported from Liberia and Sierra Leone. In Guinea, 12 new cases and 5 deaths were reported during the same period. These include suspect, probable, and laboratory-confirmed cases. The surge in the number of new EVD cases in Guinea after weeks of low viral activity demonstrates that undetected chains of transmission existed in the community. This phenomenon is retrogressive to the control of the EVD outbreak; and calls for stepping up outbreak containment measures, especially effective contact tracing.
In addition, the Ministry of Health of Nigeria has reported the first probable case of EVD. According to the Nigeria authorities, the case is a 40-year-old Liberian male national who recently travelled to Nigeria where he presented in hospital with symptoms of EVD. The patient travelled by air and arrived in Lagos, Nigeria, on 20th July via Lomé, Togo. He was symptomatic while traveling, was admitted to a private hospital immediately on arrival, and died on 25 July. On 22 July, a sample was taken and preliminary laboratory analysis was conducted in the virology laboratory of Lagos University Teaching Hospital and tested positive for Ebola virus. The sample from this case is being referred to the WHO Collaborating Centre at the Institut Pasteur in Dakar, Senegal, for confirmation. The national authority in Nigeria is working closely with WHO and partners to ensure that this incident case is contained at the source.