NEW YORK (AP) — A new 10-nation survey of Pentecostal and charismatic Christians, considered the fastest-growing stream of Christianity worldwide, shows they are deeply influencing the Roman Catholic and mainstream Protestant churches and are poised to make a big impact on global affairs.

The poll released Thursday by the Washington-based Pew Forum on Religion & Public Life found that "spirit-filled" Christians, who speak in tongues and believe in healing through prayer, comprise at least 10 percent of the population in nine of the 10 surveyed countries.

The surveys were conducted over the spring and summer in Brazil, Chile, Guatemala, Kenya, Nigeria, South Africa, India, the Philippines, South Korea and the United States.

The survey estimated that Pentecostals and charismatics together comprise at least half the population of Brazil, Guatemala and Kenya, and 44 percent of the Philippines.

They make up about one-third of the population of South Africa and Chile and nearly one-quarter of Nigerians and U.S. residents.