01:146:328 Lecture Notes - Lecture 2: Eugene Odum, Symbiosis, Cellulase

• School: Rutgers University
• Department: Cell Biology and Neuroscience
• Course: 01:146:328
• Professor: Dr.Anne Keating

Document Summary

Introduction to parasitology: animal associations, symbiosis: a close association of organisms of different species. Intermediate host [ih] (1) is absolutely required for parasite development, but the parasite does not reach sexual maturity: overdispersed distribution (is how parasites are distributed within host population) And only a few hosts have very high parasite burden: life cycles, mature for depicting stages of parasite and host(s) it infects (1) ex) opistherchis viverrini (a) the life cycle involves human as host. Parasite reaches sexual maturity and the eggs are in the host feces. The eggs are then going to be ingested by a snail. The snail is the intermediate host in the life cycle; here the parasite goes through larval development. Eventually, a stage called the cercaria get released into the water where the snail lives. Inside the fish, they develop into another larval stage, so now the fish is. Now a human eats the fish with the metacercarria, that host is now infected.