Chinese abstract…i English abstract…iii Acknowledgement…v Index…vii Table Index…viii Figure Index…ix 1. Introduction 1.1 Central nervous system (CNS) of anamniotes retains neuronal regenerative capacity…1 1.2 Growth-associated protein-43 (GAP-43) is widely used as a neuron specific marker of developing and regenerating neurons…2 1.3 Studies of fish optic nerve regeneration…4 1.4 Neuronal maturity in hosts is an important factor determining the susceptibility to age-related neurotropic viruses…6 1.5 Nervous necrosis virus is an age-related neurotropic virus in many high economic valuable marine fishes…8 2. Scientific aims…10 3. Materials and methods…11 4. Results…23 5. Discussion…35 6. References…43 7. Tables…48 8. Figures…51
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