Modifies a noun

• parasite: Protozoan parasites in the UK - cause for concern?

• infection: The key word in tackling protozoan infections is biosecurity.

• disease: These may be a possible target for the drugs which are desperately needed in the fight against protozoan diseases, as Paul McKean describes.

• world: These are Coleps, the jackals of the protozoan world.

• paramecium: He used flasks of different species of the protozoan Paramecium, which eats bacteria.

• cell: Lacrymaria olor is a protozoan cell with the colorful name of " tear of a swan " .