Disease Outbreak Update: Lassa fever continues in Nigeria

24 Oct 2019


Transmission electron micrograph (TEM) of a number of Lassa virus virions. Source: CDC's Public Health Image Library Image, Credit: C. S. Goldsmith

We publish biweekly updates on outbreaks of emerging infectious diseases from across the world.
Information available within this Disease Outbreak Update is produced by Program for Monitoring Emerging Diseases (ProMED)

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Outbreak Update

Nigeria Centre for Disease Control:

In the reporting week 40 (30 Sep-6 Oct 2019) 7 new confirmed cases were reported.

From 1 Jan-6 Oct 2019, a total of 4019 suspected cases have been reported from 23 states. Of these, 721 were confirmed positive, 18 probable, and 3256 negative (not a case).

Since the onset of the 2019 outbreak, there have been 154 deaths in confirmed cases. Case fatality ratio in confirmed cases is 21.4%.

Predominant age-group affected is 21-40 years.

The male to female ratio for confirmed cases is 1:1.

A total of 19 health care workers have been infected since the onset of the outbreak in 10 States.

A total of 8345 contacts have been identified from 21 states. Of these 396 (4.7%) are currently being followed up, 7872 (94.3%) have completed 21 days follow up, while 12 (0.1%) were lost to follow up. 132 symptomatic contacts have been identified, of which 65 (49.2%) have tested positive.

National Lassa fever multi-partner, multi-sectoral Technical Working Group (TWG) continues to coordinate response activities at all levels.

See the full ProMED post




Democratic Republic of Congo


Outbreak Update

World Health Organization Africa Region Ebola Dashboard:

3248 cases (including 4 new confirmed case), of which 3131 confirmed.

117 probable cases, 426 suspected cases.

50 cases in the last 21 days.

1044 survivors.

2169 deaths.

4300 contacts being followed out of 5300 identified.


Outbreak Response

Vaccination of taxi motorcyclists continues in the sub-coordinations of Butembo, Beni, Mangina in Mabalako in North Kivu and Mambasa in Ituri.

Since the start of vaccination on 8 Aug 2018, 240 494 people have been vaccinated.

See the full ProMED post



The Program for Monitoring Emerging Diseases (ProMED), a program of the International Society for Infectious Diseases, is an internet-based reporting system) dedicated to rapid global dissemination of information on outbreaks of infectious diseases and acute exposures to toxins that affect human health, including those in animals and in plants grown for food or animal feed. Find out more on their website www.promedmail.org