Cross-infection experiments with Australian Perkrisus species

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Abstract
Infections of Perkinsus spp. were initiated in 9 mollusc species using zoospores from cultured prezoosporangia held in petri dishes containing seawater. We transferred parasites isolated from bivalves to gastropods and vice versa. Isolates from tropical, subtropical and temperate hosts were transferred to mollusc hosts from different climate origins. Some hosts, e.g. Saccostrea commercialis, were largely refractory, with only light infections developing in a few molluscs. Other hosts, e.g. Anadara trapezia and Pinctada sugillata, became heavily infected. An experimental infection in one A. trapezia endured in the laboratory for 7 mo.

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