The [[trophozoite]] form of Giardia was first observed in 1681 by [[Anton van Leeuwenhoek]] in his own diarrheal stools. His observations were recreated, using a single lensed microscope of the kind used by Leeuwenhoek, by British microbiologist [[Brian J. Ford]] who showed how clearly one could view [http://www.brianjford.com/Giardia-14-06.pdf Giardia through a primitive microscope].
