Islamabad, Sep 18 (IANS): Two new polio cases were reported in Pakistan Thursday.

According to health officials, the cases were confirmed from Karachi city, Dawn online reported.

The first case was a 10-month-old boy who tested positive for polio.

The child had been vaccinated once before.

His case is one of the few across Pakistan where children had been administered at least one dose of the oral vaccine but still tested positive for the crippling disease.

The second case was 22-month-old infant who had never been administered polio drops.

Most polio cases are primarily the result of non-administration of the vaccine either due to the family's refusal or because polio volunteers are not able to reach families due to security impediments.

In 2014, Pakistan's total number of polio cases has escalated to 160, standing at the top of the last three polio endemic countries in the world - the other two being Nigeria and Afghanistan.

In 2012, a total of 58 polio cases had been reported in Pakistan and 2013 saw as many as 93 cases.