Indonesian health officials have reported seven new polio infections, raising to 46 the number of cases since the crippling disease re-emerged in the country last month.

The U.N. World Health Organization confirmed the cases Thursday in West Java province, where the waterborne disease first appeared back in April.

It was the second time in a week the U.N. health agency reported a jump in cases of the disease.

Indonesia inoculated nearly 6.5 million children between May 31 and June 2 in an effort to stamp out the disease.

Indonesia is one of a number of countries where polio has re-emerged since 2003, and the first outside Africa and the Middle East. The outbreak has been traced to northern Nigeria, where hard-line Muslims had boycotted a vaccination campaign.

Some information for this report provided by Reuters.