Weekly Epidemiological Report

July 2018 Week 27


Developing Medium-term Strategies for Cholera Control in Nigeria

Posted: 24-07-2018 09:03:24 PM

As part of preparedness to develop medium and long term interventions for cholera control, the Nigeria Centre for Disease Control (NCDC) in collaboration with the National Primary Healthcare Development Agency (NPHCDA) and World Health Organization (WHO) organised a workshop in Abuja on the 19th July 2018. The goal was to review the country’s historical data on cholera (2012 to 2017) to effectively prioritise and plan for medium & long term interventions targeting hotspots.

Nigeria is endemic for cholera with cases reported in States, mostly throughout the year. Despite previous efforts, Nigeria continues to record high incidence of cases with limited focus on water, sanitation and hygiene (WaSH) strengthening. This has prompted the call for a revision of strategies and the shift to a multi-sectoral, long term planning of interventions.

In public health, hotspots are geographically limited areas (e.g. LGA) where socio-cultural, environmental conditions facilitate the transmission of a disease. Thus, big gains can be made from targeting hotspots with integrated interventions.

To this end, Nigeria recently completed a mapping of hotspots for cholera and held a workshop to discuss findings. The workshop had representatives from the National Primary Healthcare Development Agency, Federal Ministry of Water Resources, Federal Ministry of Environment, State Ministries of Health (State Epidemiologists & State Immunization officers), WHO, UNICEF, US-CDC, Nigerian Red Cross/ICRC, MSF Spain, MSF France, MSF Belgium, MSF Swiss, Sanofi-Pasteur and other stakeholders.

With this activity, the country is on track to develop a medium term oral cholera vaccination strategy and other well defined interventions to reduce the burden of cholera.

In working with this wide range of stakeholders, we are ensuring that Nigeria has the capacity to effectively utilise the limited human and materials resources to response cholera outbreaks


In the reporting week ending on July 8, 2018:

o There were 212 new cases of Acute Flaccid Paralysis (AFP) reported. None was confirmed as Polio. The last reported case of Polio in Nigeria was in August 2016. Active case search for AFP is being intensified as Nigeria has reinvigorated its efforts at eradicating Polio.

o 469 suspected cases of Cholera were reported from 22 LGAs in eight States (Adamawa – 45, Bauchi – 115, Borno – 5, Gombe – 7, Kano –122, Katsina – 30, Kogi – 16 & Zamfara - 129). Of these, 16 were laboratory confirmed and eight deaths were recorded.

o 20 suspected cases of Lassa fever were reported from eight LGAs in eight States (Bayelsa – 1, Edo – 2, Gombe – 1, Ogun – 4, Ondo – 9, Osun -1, Plateau - 1 and Taraba - 1). Five were laboratory confirmed and two deaths were recorded.

o There were five suspected cases of Cerebrospinal Meningitis (CSM) reported from four LGAs in two States (Benue – 1 & Katsina – 4). Of these, no was laboratory confirmed case and no death was recorded.

o There were 226-suspected cases of Measles reported from 27 States. No laboratory confirmed and no death was recorded.

In the reporting week, all States sent in their report except Akwa-Ibom, Cross River, Delta, Enugu, Imo and Kaduna State. Timeliness of reporting decreased from 89% to 88% in the previous and current weeks (week 26 & 27) while completeness also remains 99% at same period. It is very important for all States to ensure timely and complete reporting at all times, especially during an outbreak.


1. AFP

1.1. As at July 8th 2018, no new case of WPV was recorded

1.2. In the reporting week, 212 cases of AFP were reported from 163 LGAs in 30 States and FCT

1.2.1. AFP Surveillance has been enhanced and outbreak response is on-going in Borno and other high-risk States

1.2.2. The 2nd NIPDs was conducted from 30th June to 3rd July, 2018 using bOPV in 36 States plus FCT

12.2 The 1st & 2nd Outbreak response (OBR) to cVDPV2 in Jigawa & Gombe States, Polio event in Sokoto (SLGAs) and mop-up response in 11 LGAs in Bauchi State conducted from 10th – 13th & 26th – 29th May, 2018 using mOPV2 respectively

1.2.3 Two SIPDs and one NIPDs were conducted from January to April, 2018 using bOPV in 18 high risk States and 36 States plus FCT respectively


2.1 In the reporting week, five suspected Cerebrospinal Meningitis (CSM) cases were reported from four LGAs (two States; Benue – 1 & Katsina – 4) compared with 11 suspected cases reported from seven LGAs (four States) at the same period in 2017 (Figure 1)

2.2 Between weeks 1 and 27 (2018), 3191 suspected meningitis cases with 102 laboratory confirmed and 206 deaths (CFR, 6.46%) from 253 LGAs (29 States) were reported compared with 9697 suspected cases and 602 deaths (CFR, 6.21%) from 297 LGAs (31 States) during the same period in 2017.

2.3 Timeliness/completeness of CSM case-reporting from States to the National Level (2018 versus 2017): on average, 88.2% of the 26 endemic States sent CSM reports in a timely manner while 98.2% were complete in week 1 - 26, 2018 as against 76.4% timeliness and 92.3% completeness recorded within the same period in 2017


3.1 469 suspected cases of Cholera with 16 Laboratory Confirmed cases and eight deaths (CFR, 1.7%) were reported from 34 LGAs (11 States; Adawama – 45, Bauchi – 115, Borno – 5, Gombe – 7, Kano – 122, Katsina – 30, Kogi – 16 & Zamfara - 129) in week 27, 2018 compared with 109 suspected cases and one death (CFR, 0.92%) were reported from ten LGAs (three States) during the same period in 2017 (Figure 2)

3.2 Between weeks 1 and 27 (2018), 10335 suspected Cholera cases with 291 laboratory confirmed and 148 deaths (CFR, 1.43%) from 98 LGAs (21 States) were reported compared with 783 suspected cases and 18 deaths (CFR, 2.3%) from 29 LGAs (13 States) during the same period in 2017.

3.3 A National Emergency Operations Centre (EOC) for Cholera has been activated at level 2 at NCDC.

3.4 Rapid Response Teams have been deployed to respond to recent cluster of cases in Kano, Bauchi, Plateau, Zamfara and Adamawa States.

3.5 National Preparedness and Response to Acute Watery Diarrhoea/ Cholera Guidelines available via http://ncdc.gov.ng/themes/common/docs/protocols/45_1507196550.pdf


4.1 In the reporting Week 27 (July 2 - 8 , 2018) seven new confirmed I cases were reported from Ondo (3), Edo (2), Taraba (1) and Plateau(1) with three new deaths Ondo (2) and Plateau (1)

4.2 From 1st January to 8th July 2018, a total of 2115 suspectedi cases have been reported from 21 states. Of these, 446 were confirmed positive, 10 are probable, 1652 negative (not a case)

4.3 Since the onset of the 2018 outbreak, there have been 115 deaths in confirmed cases and 10 in probable cases. Case Fatality Rate in confirmed cases is 25.4%

4.4 21 states have recorded at least one confirmed case across 71 Local Government Areas (Edo, Ondo, Bauchi, Nasarawa, Ebonyi, Anambra, Benue, Kogi, Imo, Plateau, Lagos, Taraba, Delta, Osun, Rivers, FCT, Gombe, Ekiti, Kaduna, Abia and Adamawa). Seventeen states have exited the active phase of the outbreak while four - Edo, Ondo, Plateau and Taraba States remain activeiv

4.5 A total of 5713 contacts have been identified from 21 states. Of these 156(2.7%) are currently being followed up, 5547(97.1%) have completed 21 days follow up while 10(0.2%) were lost follow up. 85 symptomatic contacts have been identified, of which 29 (34%) have tested positive from five states (Edo-13, Ondo-8, Ebonyi-3, Kogi -3 Bauchi-1 and Adamawa-1)

4.6 The Lassa fever national multi-partner, multi-agency Technical Working Group(TWG) continues to coordinate response activities at all levels

4.7 National VHF guidelines (National Viral Haemorrhagic Fevers Preparedness guidelines, Infection Prevention and Control of VHF and Standard Operating Procedures for Lassa fever management) are available on the NCDC website- http://ncdc.gov.ng/diseases/guidelines


5.1 In the reporting week, 226 suspected cases of Measles were reported from 27 States compared with 409 suspected cases with four Laboratory confirmed and two deaths (CFR, 0.49%) reported from 30 States during the same period in 2017

5.2 So far, 11987 suspected Measles cases with 13 Lab. Confirmed and 94 deaths (CFR, 0.78 %) were reported from 36 States and FCT compared with 14319 suspected cases with 96 laboratory confirmed and 81 deaths (CFR, 0.57 %) from 37 States during the same period in 2017

5.3 Response measures include immunization for all vaccine-preventable diseases in some selected/affected wards/LGAs during SIAs, as well as case management

6 Yellow fever

6.1 In this reporting week 9th – 15th July, 2018, 91 suspected cases were added to the national line list

6.2 One new in-country presumptive positive was report from Maitama District Hospital Abuja in the reporting week, last presumptive positive case in the Nigerian lab was 2-July-18 and last IP Dakar confirmed case from Nigeria was on 6-June -2018

6.3 From the onset of this outbreak on September 12, 2017, a total of 2,400 suspected yellow fever cases with 47 Laboratory confirmed and 47 deaths (CFR, 1.96%) have been reported from 504 LGAs (36 States & FCT)

6.4 Predominant age groups affected among the suspected cases are 20 years and below accounting for 62.5%; [male to female ratio is 1.4 to 1 (male 58.0%, female 42.0%)]

6.5 Surveillance activities have been intensified across all States

6.6 NCDC and partners have completed the assessment of some laboratories in Nigeria for possible inclusion into the testing laboratory network

6.7 NCDC & partners conducted detailed case investigation in Edo and Ekiti states following recent reports

7. Update on national Influenza sentinel surveillance, Nigeria week 1 - 28, 2018

7.1. From week 1- 28, 170-suspected cases were reported, of which 154 were Influenza like-illness (ILI), 16 Severe Acute Respiratory Infection (SARI).

7.2 A total of 170 samples were received and all samples were processed. Of the processed samples, 154(90.6%) were ILI cases, 16 (9.4%) were Severe Acute Respiratory Infection (SARI).

7.4. Of the 154 processed ILI samples, 16 (10.4%) was positive for Influenza A; 26(16.9%) positive for Influenza B and 112 (72.7%) were negative.

7.5 For the processed 16 SARI samples, five (31.3%) were positive for Influenza A while the remaining 11 (68.7%) were negative.

7.6 42 (27.4%) of the processed 170 samples were positive for Influenza, with 16 (38.1%) of these positive for Influenza A and 26 (61.9%) positive for Influenza B.

7.5. The subtypes A seasonal H3, 2009A/H1N1 and A/not subtyped account for (0.0%), 11 (68.8%) and 5 (31.2%) of the total influenza A positive samples respectively.

7.6 The subtypes B VICTORIA, B Not subtyped and B Yamagata account for 10(38.5%), 16(61.5%) and 0(0.0%) of the total influenza B positive samples respectively

7.7 The percentage influenza positive was highest (75.0%) in week 6, 2018

7.8 In the reporting week 1 -28, no samples were left unprocessed


Surveillance Unit:

Nigeria Centre for Disease Control,

801 Ebitu Ukiwe Street, Jabi, Abuja, Nigeria.

[email protected]



Highlight of the week

  • 6 Yellow fever
  • 7. Update on national Influenza sentinel surveillance, Nigeria week 1 - 28, 2018

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