从事旅行医学的医生已越来越多地发现亚急性或慢性腹泻综合征。现有医学文献中,有关慢性旅行者腹泻的发病率,易感因素的自然史的资料相当有限。从对发展中国家的当地居民、移居国外者及长期居留者的研究中可推论出某些有用的信息。近年短期旅行者中发现的慢性腹泻综合征得到越来越多的关注,已发现细菌性病原体,包括急 Doctors in travel medicine have increasingly found subacute or chronic diarrhea syndromes. In the current medical literature, the data on the incidence of diarrhea in chronic travelers and the natural history of predisposing factors are quite limited. Some useful information can be deduced from studies of locals, expatriates and long-term residents in developing countries. In recent years, short-term travelers found in chronic diarrhea syndrome get more and more attention has been found that bacterial pathogens, including acute