WASHINGTON, Dec 1 (Reuters) - The U.S. Centers for Disease Control and Prevention (CDC) has issued a directive requiring airlines to disclose passenger names and other information about those who have recently been in eight southern African countries, according to documents seen by Reuters.

Effective Nov. 8, the CDC required all airlines to collect contact tracing information from all international air passengers but had not required them to turn over those names. The directive, which took effect late Tuesday, requires airlines to turn over the information within 24 hours of passengers arriving in the United States who have been in one of the eight African countries subject to travel restrictions. (Reporting by David Shepardson Editing by Chizu Nomiyama)