Posted by Global Polio Eradication Initiative
Wild poliovirus type 1 and Circulating vaccine-derived poliovirus cases
 
CountriesYTD 2018YTD 2017Total in 2017Onset of paralysis of  
most  recent case
WPVWPVWPVWPV
Afghanistan8414
27-Apr-18
Nigeria00021-Aug-16
Pakistan32818-May-18

 

Polio this week as of June 19, 2018

  • Featured on www.polioeradication.orgStopping polio at the border.
  • World leaders reaffirmed commitment to eradication at the G7 summit.
  • Advance notification of cVDPV1 in Papua New Guinea:  Following identification last month of an AFP case from which VDPV type 1 had been isolated, genetic sequencing of two VDPV1s from two non-household contacts of the AFP case, has now confirmed that VDPV1 is circulating and will be officially classified as a  ‘circulating’ VDPV type 1 (cVDPV1).  The National Department of Health (NDOH) is closely working with the GPEI partners in launching a comprehensive response. The cVDPV1 will be officially reported in next week’s data.
  • Advance notification of new cVDPV2 in DR Congo:  Advance notification of a new cVDPV2 case was received this week from Ituri province, in the north-east of DR Congo, close to the border with Uganda.  Initial investigations are ongoing, but early reports are that the child had onset of paralysis on 5 May 2018, and has a recent travel history with Haut Katanga.  Genetic sequencing indicates the case is linked to the Haut Lomami/Tanganika/Haut Katanga outbreak. The case will be officially reported in next week’s data.
  • Summary of newly-reported viruses this week: Three wild poliovirus type 1 (WPV1) positive environmental samples reported from Pakistan, and two from Afghanistan. One circulating vaccine-derived poliovirus type 2 (cVDPV2) environmental sample from Somalia. See country sections below for further details.

NA: Onset of paralysis in most recent case is prior to 2017. Figures exclude non-AFP sources. All cVDPV are type2.  cVDPV definition: see document “Reporting and classification of vaccine-derived polioviruses” at [pdf]

Keep Reading for an Endemic Country Summary
(as of June 19, 2018)

Afghanistan

  • No new cases of wild poliovirus type 1 (WPV1) have been reported this week.  The total number of WPV1 cases in 2018 remains eight.
  • The most recent case (by date of onset) occurred in Kandahar province, with onset of paralysis on 27 April 2018.
  • Three wild poliovirus type 1 (WPV1) positive environmental samples have been reported, one collected in Fata province on 19 May, one collected in Peshawar district, Khyber Pakhtunkhwa province, on 24 May, and one collected in Quetta district, Balochistan province, on 28 May.
  • Read the latest polio update from Afghanistan to see information on cases, surveillance and vaccination campaigns.

Nigeria

  • No new cases of wild poliovirus type 1 (WPV1) were reported in the past week.
  • The total number of WPV1 cases for 2016 is four and no cases have been reported in 2017 or 2018. The most recent WPV1 case (by date of onset) was reported in Monguno Local Government Area, Borno State, with onset on 21 August 2016.
  • Circulating vaccine-derived poliovirus type 2 (cVDPV2) is confirmed in Jigawa state, with isolation of the virus from environmental samples and one AFP case with onset of paralysis on 15 April.
  • Since confirmation of cVDPV2 in Nigeria, the country has conducted additional acute flaccid paralysis surveillance strengthening activities including enhanced active surveillance visits, and community sampling. The programme has also carried out extensive search for type 2 containing vaccines (tOPV/mOPV2) in the areas surrounding where the virus was detected.
  • The GPEI is working with Regional and country counterparts and partners to supporting the local public health authorities to conduct outbreak response. A round of mOPV2  vaccination covering part of Jigawa, Gombe, Bauchi and Sokoto was implemented in May and another round is planned in June.

    Pakistan

    • No new cases of wild poliovirus type 1 (WPV1) have been reported this week. The total number of officially reported WPV1 cases in Pakistan in 2018 is three.
    • The most recent case (by date of onset), occurred in Dukki, Balochistan province, with onset of paralysis on 18 May 2018.
    • Two wild poliovirus type 1 (WPV1) positive environmental samples have been reported, one collected in Kandahar on 28 May and one in Jalalabad district, Nangarhar province, also on 28 May.
    • Read the latest polio update from Pakistan to see information on cases, surveillance and vaccination campaigns.