Scientists are not sure how Buruli ulcer disease spreads or even how it develops in nature. They suspect it may involve mosquitoes or other organisms that live in water.

• 科学家不确定布鲁里溃疡病是如何传播的。他们甚至不清楚此病在自然界中是如何发展的。他们怀疑蚊子或其他水生生物是传播此病的媒介。