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Tissue tropism is the cells and tissues of a host which support growth of a particular virus or bacteria. Some bacteria and viruses have a broad tissue tropism and can infect many types of cells and tissues. Other viruses may infect primarily a single tissue. For example rabies virus affects primarily neuronal tissue. ==Influencing factors== Factors influencing viral tissue tropism include: * The presence of cellular receptors permitting viral entry. * Availability of transcription factors involved in viral replication. * The molecular nature of the viral tropogen. The cellular receptors are the proteins found on a cell or viral surface. These receptors are like keys allowing the viral cell to fuse with a cell, or attach itself to a cell. The way that these proteins are acquired is through similar process to that of an infection cycle. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「tissue tropism」の詳細全文を読む スポンサード リンク
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