Hanging drop method is used for -
trichomonas vaginalis vaginal or urethral discharge is examined microscopically in a drop of saline for characteristic motile trophoziotes with jerky movements REF:TEXTBOOK OF MEDICAL PARASITOLOGY;BAVEJA;3RD EDITION;PAGE NO 34
T. Trichomonas
Plasmodium
Toxoplasma
Cryptosporidium
parasitology