1. Canine transmissible venereal tumor is a tumor of the genitals. It is spread by sexual contact. 犬传染性性病肿瘤是一种生殖器肿瘤。通过性途径传播。
2. Monitoring programs are like surveillance activities but are for hosts known to be infected with agents transmissible to others. 监控程序类似于监察行为，但是用于已经感染有传染性的病原的宿主。
3. Prion is the causative agent of transmissible spongiform encephalopathies(prion diseases). They are composed entirely of protein, without any nucleic acid. 朊粒是传染性海绵状脑病的致病因子。他们完全由蛋白质构成，无核酸。
英英解释
adj.
1. (of disease) capable of being transmitted by infection
2. tending to occur among members of a family usually by heredity
3. inherited or inheritable by established rules (usually legal rules) of descent
