@article{oai:niigata-u.repo.nii.ac.jp:00015540, author = {押谷, 仁 and 鈴木, 宏}, issue = {3}, journal = {新潟医学会雑誌, 新潟医学会雑誌}, month = {Mar}, note = {Emerging and re-emerging viral infections have continuously occurred in many parts of the world. Such viral infections including Ebola virus, Hantavirus Pulmonary Syndrome and influenza virus A (H5N1) occurred in 1990’s. There are three sources for new viruses to emerge in human population; 1) new virus variants, 2) introduction from other species, 3) dissemination from smaller population. Many factors should be involved in the emerging or re-emerging of viruses. These include viral, social and environmental factors. The most important viral factor is thigh mutation rate, particularly in RNA viruses. Various social factors such as population movement, urbanization, and developments in tropical forests are responsible for some emerging or re-emerging viruses. In some viral infections, environmental factors play a crucial role. Technology developments such as enhanced global surveillance and improved laboratory methods have also contributed to the detection of new virus infections. International collaboration system urgently needs to be established to make a quick and appropriate response to emerging and re-emerging diseases. Such international collaboration is organized by the World Health Organization(WHO).}, pages = {77--82}, title = {1) ウイルス性新興・再興感染症(シンポジウム 新興・再興感染症, 第549回新潟医学会)}, volume = {114}, year = {2000} }