“Growing resistance to a key anti-malarial drug derived from a shrub used in traditional Chinese medicine is threatening to roll back gains made in combating the disease,” according to experts attending a U.N.-sponsored malaria conference that concluded on Friday in Sydney, Australia, the U.N. News Centre reports. Malaria “therapies based on artemisinin — an extract from the sweet wormwood bush used for centuries in Chinese medicine as a fever cure — were” formulated in combination with other antimalarials to form artemisinin-based combination therapies (ACTs) that the WHO thought would be effective for years, but resistance to the ACTs has begun to appear in some areas, the news service notes. “Specifically, [the Roll Back Malaria Partnership] noted, artemisinin resistance has been detected in Cambodia, Myanmar, Thailand and Vietnam,” the news service writes (11/2). Agence France-Presse examines efforts to fight drug-resistant malaria on the Thai-Myanmar border (Rook, 11/4).