-causes trichomoniasis (STD)
-infects the urethra of men and vagina of women
-no cyst
-oval-shaped cell with a prominent nucleus, 4 anterior flagella and a posterior barb projection (axostyle) that can be used for attachment
A. Trichomonas vaginalis
B. Giardia lamblia
C. Entamoeba histolytica
D. Cryptosporidium parvum
