Types
of
Tumor
Virus
Infection -
| I. Productive - Synthesis and release of progeny virus |
| 1. Lytic - host cell killed, e.g. DNA viruses |
| 2. Nonlytic - no noticeable cytopathic effects on host cells,e.g. RNA viruses |
| II Nonproductive - Progeny virus not produced |
| 1. Abortive - loss of viral genome after infection |
| 2. Defective-viral genome incomplete : Part missing |
| 3. Nonpermissive - host cells lack certain factors |
| 4. Inactive - Viral genome not transcribed, partly or wholly |