LASSA FEVER - WEST AFRICA (22): NIGERIA

Posted on 10TH APR 2018
tagged Lassa Fever, West Africa; Nigeria

A ProMED-mail post
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International Society for Infectious Diseases
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Date: Sun 8 Apr 2018
Source: Nigeria Centre for Disease Control Situation Report [edited]
http://www.ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20L...

Highlights
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- In the reporting week 14 (2-8 Apr 2018) 8 new confirmed cases were recorded from 5 States - Edo (3 cases), Ondo (2), Ebonyi (1), Plateau (1), and Taraba (1) with 3 new deaths in confirmed cases from Ondo (1), Ebonyi (1) Taraba (1) and a backlog of an old death in a confirmed case from Kogi state.
- From 1 Jan - 8 Apr 2018, a total of 1781 suspected cases have been reported from 20 states. Of these, 408 were confirmed positive, 9 are probable, 1351 are negative (not a case) and 13 are awaiting laboratory results (pending).
- Since the onset of the 2018 outbreak, there have been 101 deaths in confirmed cases, 9 in probable cases. Case Fatality Ratio in confirmed cases is 24.8 percent.
- 20 states have recorded at least one confirmed case across 57 Local Government Areas (Edo, Ondo, Bauchi, Nasarawa, Ebonyi, Anambra, Benue, Kogi, Imo, Plateau, Lagos, Taraba, Delta, Osun, Rivers, FCT, Gombe, Ekiti, Kaduna and Abia). Nine states have exited the active phase of the outbreak while 11 States remain active -- Figure 1.
- In the reporting week 14, one new healthcare worker was affected in Ebonyi state with one death and 27 health care workers have been affected since the onset of the outbreak in 7 states - Ebonyi (16), Nasarawa (1), Kogi (2), Benue (1), Ondo (3), Edo (3) and Abia (1) with 6 deaths in Ebonyi (4), Kogi (1) and Abia (1).
- 81percent of all confirmed cases are from Edo (42 percent), Ondo (23 percent) and Ebonyi (16 percent) states.
- There are 15 cases currently being managed in treatment centres across 6 states - Edo (4), Ebonyi (5), Ondo (4), Plateau (1), and Osun (1).
- A total of 4480 contacts have been identified from 20 states. Of these 658 (14.8 percent) are currently being followed up, 3815 (85 percent) have completed 21 days follow up while 7(0.2 percent) were lost follow up. 74 symptomatic contacts have been identified, of which 28 (38 percent) have tested positive from 5 states (Edo-13, Ondo-8, Ebonyi-3, Kogi -3 and Bauchi-1).
- National RRT team (NCDC staff and NFELTP residents) batch D continues response in Abia state support.
- National Lassa fever multi-partner multi-agency Emergency Operations Centre (EOC) continues to coordinate the response activities at all levels.

Figure 1 [map]: Distribution of confirmed Lassa fever cases in Nigeria as at 1 Apr 2018.
Figure 2 [map]: Distribution of suspected and confirmed Lassa fever cases in Nigeria by LGA.
Figure 3 [graph]: Confirmed (400) and probable (9) cases of Lassa fever by epidemiological week in Nigeria week 1-13, 2018.
Figure 4 [graph]: Confirmed Lassa fever cases in Nigeria with state specific case fatality rates (CFR) as at 1 Apr 2018.
Figure 5 [graph]: Epicurve of confirmed cases Lassa fever in Edo state week 1-13, 2018.
Figure 6 [graph]: Distribution of Lassa fever confirmed cases in Edo state by LGA as at 1 Apr 2018.
Figure 7 [graph]: Epicurve of Lassa fever confirmed cases in Ondo state week 1-13, 2018.
Figure 8 [graph]: Epicurve of Lassa fever confirmed cases in Ebonyi state week 1-13, 2018.

--
Communicated by:
ProMED-mail

[Although new cases have been reported over the past week, the graphs of the epidemic curves continue to indicate that the peak number of cases nationally has passed. However, the Lassa fever period can be expected to continue for another 2-3 months, into June 2018. New cases have occurred over the past few days in several states. As noted in previous comments, providing adequate surveillance and timely treatment over such a large geographic area is challenging. Fortunately, there is international help participating in treatment and surveillance. Unfortunately, one additional health care person has been infected during this week.

The maps and graphs in the report above are interesting and provide a good picture of how the outbreak has progressed over time. They can be accessed at the source URL above.

Maps of Nigeria: http://www.un.org/Depts/Cartographic/map/profile/nigeria.pdf and http://healthmap.org/promed/p/62. - Mod.TY]

See Also
Lassa fever - West Africa (21): Nigeria 20180406.5727850
Lassa fever - West Africa (20): Nigeria 20180327.5714291
Lassa fever - West Africa (19): Nigeria 20180315.5687321
Lassa fever - West Africa (18): Nigeria (BA) 20180313.5683816
Lassa fever - West Africa (16): Nigeria 20180306.5670231
Lassa fever - West Africa (14): Nigeria 20180228.5655382
Lassa fever - West Africa (13): Nigeria 20180222.5645501
Lassa fever - West Africa (12): Nigeria 20180221.5641157
Lassa fever - West Africa (11): Nigeria, WHO 20180215.5629350
Lassa fever - West Africa (10): Nigeria 20180212.5622070
Lassa fever - West Africa (07): Nigeria 20180206.5608967
Lassa fever - West Africa (06): Nigeria (DE, ON) 20180201.5600192
Lassa fever - West Africa (05): Nigeria 20180131.5597457
Lassa fever - West Africa (04): Nigeria 20180125.5585380
Lassa fever - West Africa (03): Benin (AK) ex Nigeria, WHO 20180124.5581805
Lassa fever - West Africa (02): Nigeria, Benin (AK) ex Nigeria 20180124.5576379
Lassa fever - West Africa: Nigeria 20180115.5561615
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