Disease Outbreak News


Disease Outbreak News - 27 January 2016

The National IHR Focal Point of Nigeria has notified WHO of different outbreaks of Lassa fever occurring in the country.

Details of the outbreaks

Between August 2015 and 23 January 2016, 159 suspected cases of Lassa fever, including 82 deaths, were reported across 19 states. Investigations are ongoing and a retrospective review of cases is currently being performed; therefore, these figures are subject to change.

The 4 most affected states are Bauchi, Edo, Oyo and Taraba, which account for 54% of the confirmed cases (n=54) and 52% of the reported deaths (n=34). The remaining 15 States have reported less than 5 confirmed cases.

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Disease Outbreak News - 21 December 2015

On 21 October 2015, the National IHR Focal Point of Cape Verde informed WHO of the country’s first reported epidemic of Zika virus infection.

On 5 October 2015, health centres in Praia, Santiago Island began to report cases of cutaneous rash and pruritus with and apparently without fever. The earliest onset of symptoms occurred on 27 September. As of 14 October, a total of 165 cases had been reported.

Blood samples from 64 cases were sent to the Institute Pasteur of Dakar, Senegal. A total of 17 samples tested positive for Zika virus – 15 were IgM positive and 2 were positive by reverse transcription polymerase chain reaction (RT-PCR). The differential diagnosis included dengue, chikungunya, Rift Valley fever, West Nile fever, and yellow fever. Samples were also negative for measles and rubella.

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Risk Assessment

Serious Public Health Impact

Yes. A cholera outbreak is ongoing in the Democratic Republic of Congo (DRC), especially in Maniema province, ex-Oriental province, ex-Katanga province, South Kivu and North Kivu.

Despite the reduction in the number of cases in recent weeks there continues to be risk of spread to new areas, particularly along the Congo River.


Cholera outbreaks are ongoing in different regions in Tanzania since January 2015. As of 15 August 2015, WHO was notified by the Ministry of Health and Social Welfare (MOHSW) of Tanzania of new foci of cholera outbreaks.


outbreak bulletin issue 5  30 October 2015 FIn this bulletin, it is important to note that the Ebola virus disease (EVD) epi-demic in West Africa has significantly declined. On 3 September 2015, WHO declared Liberia free of Ebola virus transmission in the human population. Sierra Leone is on count-down since 25 September 2015 for declaring end of EVD outbreak if no new cases occur. However, Guinea continues to report confirmed cases. Elsewhere in the Region, a cholera outbreak was recently reported in Tanzania; Dar es Salaam, the capital city, being the most affect-ed. Outbreaks of chikungunya, dengue fever, measles and Rift Valley Fever were also reported in the period under review.

In this issue, a general overview of public health events (PHEs) that occurred between January - September 2015, as well as a summary of other ongoing outbreaks as reported by Member States, are being described to inform pub-lic health officers across the continent, health partners and wider audience.