Attachments
HIGHLIGHTS
- In this reporting week 18th June – 24th June, 2018
o One hundred and seventy eight (178) suspected cases were added to the national line list
o No new in-country presumptive positives in the reporting week
o Last presumptive positive case in the Nigerian lab was 10-May-18
o Last IP Dakar confirmed case from Nigeria was on 6-June -2018
SUMMARY OF OUTBREAK
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A yellow fever outbreak is currently active in Nigeria. Confirmed cases have been recorded in eleven States (Kwara, Kogi, Kano, Zamfara, Kebbi, Nasarawa, Niger, Katsina Edo, Ekiti and Rivers State): in 22 Local Government areas (LGAs) [Table 1]
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125 samples (presumptive positive and inconclusive) in 57 LGAs sent to IP Dakar
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All Nigerian states have reported suspected cases in 484 (62.5%) LGAs
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From the onset of this outbreak on September 12, 2017, a total of 2,254 suspected yellow fever cases have been line-listed as at week 25 [18th June – 24th June 2018 (Table 1)].
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Of the 2,253 suspected cases, 2,071 (91.9%), had blood samples collected and sent to the Nigerian testing laboratories for confirmation
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Of the 2,071 samples collected, 109 (5.3%) tested positive for yellow fever (presumptive positives) and 16 (0.8%) inconclusive results in six Nigerian laboratories. (Tables 1)
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As at Epi week 25 [18th June – 24th June 2018] 47 (37.6%) samples out of the 125 (positive and inconclusive) samples in Nigeria have been confirmed positive by IP, Dakar. 77 samples were negative, 1 sample is awaiting results from IP Dakar [Table 1]. o Predominant age groups affected among the suspected cases are 20 years and below accounting for 62.8%: [Median age is 15 years (range 1 – 92 years) Male to female ratio is 1.4 to 1 (male 57.9%, female 42.1%)] o Age groups mostly affected among confirmed cases are 20 years and below accounting (57.4%) o Among the confirmed, male to female ratio is 1.8:1 (male 63.8%, female 36.2%)
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Yellow fever vaccination campaigns have been successfully completed in six states o Yellow fever Preventive mass vaccination campaign (PMVC) completed in six states Nasarawa, Cross River, Akwa Ibom; Kogi, Kwara and Zamfara o 2018 phase 2 PMVC to be implemented from 8 th – 17 th November, 2018 in Sokoto, Kebbi, Niger, FCT, Plateau and Borno States
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Total number of deaths in all cases (suspected, probable and confirmed cases) is 47, while 10 deaths were recorded among confirmed cases only. Therefore, the case fatality ratio (CFR) for all cases (including suspected, probable and confirmed) is 2.1%, and 21.3% for confirmed cases.