動物의 流行性 癌

Transmissible Neoplastic Diseases of Animals A Review on the Models of Viral Tumors (Avian Lymphoid Leukosis and Marek’s Disease)

Cancer(malignant tumor) is a major problem confronting the medical and biological sciences. The nature of cancer is very complex, involving many different morphological types. Implicated are a host of etiological factors, such as genetic, biological, biochemical, immunological, and hormonal. The difficult problem of successfully controlling or preventing concer has become a crusade of the civilized world. Although some malignant tumors can be induced by physical and chemical carcinogens, there has been recent renewed interest in viral carcinogenesis. It has been known for quite some time that a large number of animal tumors are induced by RNA or DNA viruses. Thus many researchers, it was difficult to ignore the role of viruses in the etiology of certain types of cancer in man.