Introduction to Parasitology. Definitions and Concepts. Basic Definitions. Symbiosis Term was first coined by the German de Bary in 1879 to mean “living together.”
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Definitions and Concepts
Branchiobdelid worm attached to a crayfish
Honeybee bringing pollen to a desert shrub
Anterior end of a hookworm
“An organism living in or on another living organism, obtaining from it part or all of its organic nutriment, commonly exhibiting some degree of adaptive structural modification, and causing some degree of real damage to its host”