Reemergence of Echinococcus granulosus Infections after 2004 Termination of Control Program in Magallanes Region, Chile.

After termination of a control program in 2004, Echinococcus granulosus infections have reemerged in Magallanes Region, Chile. Prevalence in sheep >2 years of age in 2023 resembled levels observed at the start of the program. Resurgence underscores the need for continued surveillance, particularly in younger sheep, to monitor recent transmission trends.