Flagellate Protozoa

BY2012 Microbiology
Gallery of Flagellates
Flagellate Protozoa
Flagellates
have one or
more long
thin flagella
Flagellate Protozoa
Flagellate protozoa are found widely in nature. Flagellates move by
actively beating one or more long, thin flagella (white arrows). Most
are small (5 – 10 µm long). They are abundant in aquatic
environments. Flagellates are important microorganisms in the
microbial food web. They feed on bacteria and detritus.
Flagellate Protozoa
Peranema spp
Euglena
Flagellate Protozoa
Euglena
Flagellate Protozoa
Naegleria gruberi
Eutreptiella
Flagellate Protozoa
Monocercomonoides
Monocercomonoides
Flagellate Protozoa
Ochromonas
Flagellate Protozoa
Flagellum
Bicoeca sp.
Flagellate Protozoa
Streblomastix
Trichonympha
Tuft of
flagella
Flagella
10 µm
Symbiotic cellulose-digesting flagellates
found in the gut of termites
Giardia lamblia Trophozoite
Colourised scanning electron micrographs of
Giardia lamblia tyrophozoite stage
Giardia lamblia Life Cycle
Giardia lamblia Life Cycle
2 µm
Cyst
Trophozoites
Giardia lamblia Trophozoites
Giardia lamblia Trophozoite
Scanning EM showing flagella
Trichomonas vaginalis
Colourised scanning electron micrograph of Trichomonas
vaginalis attached to vaginal epithelial cells
Trichomonas vaginalis
Trichomonas vaginalis Trophozoite
Nucleus
Axostyle
Undulating membrane
Flagella
Trichomonas vaginalis Trophozoite
Trichomonas dividing
Other Flagellates of Man
Trichomonas hominis
Dientamoeba fragilis
trophozoite
Spironucleus barkhanus
Nucleated fish
red blood cell
Spironucleus sp. in the blood of Oncorhynchus tschawytscha
(Chinook salmon). This flagellate causes systemic
spironucleosis, outbreaks of which have been reported in
salmonids in sea cages in Canada and Norway.