Fish Immunology (1+1)

Unit 6- Ontogeny of Fish Immune System

6.4. Ontogeny of nonspecific immunity
Along with maternally derived immune protection in newly hatched fry a variety of nonspecific defence mechanisms develops prior to specific immunity. Nonspecific immunity is the major defence mechanism in earlier life before the specific mechanism is fully developed. Where the nonspecific lectins and hemagglutinins found in fish eggs and fry, in addition to this presence phagocytic cells can be seen in newly hatched fry. This nonspecific immunity helps in defending the fish throughout the life. Non specific defence system also plays a significant role when the specific immune response is suppressed.