| By far the most common sporozoan intestinal parasite is Cryptosporidium parvum. |
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| Such sporozoan infections are usually unresponsive to treatment and diseased fish should be removed from the tank. |
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| Plasmodium, a genus of parasitic protozoans of the sporozoan subclass Coccidia that are the causative organisms of malaria. |
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| They are generally placed in the sporozoan class Toxoplasmea, although they may more properly be classed as coccidian parasites under the order Eucoccidia. |
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| Haplosporidian, any protozoan of the sporozoan subclass Haplosporea. |
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