Reuters reports: Polio that has crippled at least 13 children in Syria has been confirmed as being caused by a strain of the virus that originated in Pakistan and is spreading across the Middle East, the World Health Organization said.

Genetic sequencing shows the strain found in Syrian children in Deir al-Zor, where an outbreak was detected last month, is linked to the strain of Pakistani origin found in sewage in Egypt, Israel and Palestinian territories in the past year.

“Genetic sequencing indicates that the isolated viruses are most closely linked to virus detected in environmental samples in Egypt in December 2012 (which in turn had been linked to wild poliovirus circulating in Pakistan),” the United Nations agency said in a statement on Monday.

Closely related strains of the wild poliovirus of Pakistani origin have also been detected in sewage samples in Israel, the West Bank and Gaza Strip since February 2013, it said.

Polio virus has been confirmed in 13 of 22 children who became paralyzed in the northern Syrian province of Deir al-Zor. Investigations continue into the other nine cases. It is Syria’s first polio outbreak since 1999.

No children in Egypt, Israel or the Palestinian territories have been hit by polio thanks to high immunization rates and a strong response to the alert, WHO spokeswoman Sona Bari said.

Polio virus is endemic in Pakistan, Afghanistan and Nigeria despite a 25-year-old campaign to eradicate the disease, which can paralyze a child in hours.

Islamist fighters from countries including Pakistan are among groups battling to oust President Bashar al-Assad, leading to speculation that they brought the virus into the country. [Continue reading…]

See also, How the CIA and the Taliban undermined the global campaign to eradicate polio.