Reemergence of Brucella abortus, Israel, 2021.

After nearly 4 decades, Brucella abortus has reemerged in Israel, triggering an outbreak across 2 dairy farms (82/137 cows affected), as well as cases in dogs and 1 human case. Despite thorough epidemiologic and genomic investigation, the outbreak source remains unidentified. Such reemergence poses One Health challenges and necessitates ongoing surveillance.