Microscopy UK
Microscopy Uk: Flagellated Protozoa
Contains excellent photos of flagellated protozoa, as well as a good general description of flagellum.
Microscopy UK
Microscopy Uk: The Smallest Page on the Web
Dive into a single drop of pond water to discover the microscopic world of freshwater organisms. Learn about protists, bacteria, and other tiny inhabitants that can only be seen under a microscope.
Centers for Disease Control and Prevention
Centers for Disease Control: Parasites and Health: Giardia
A great overview of the Giardia parasite. Find out its geographical distribution, how it infects people, symptoms and treatment options.