Laboratory diagnosis of vaginal trichomoniasis is ‘most commonly made by;
A. identifying cyst stages in an iodine stained preparation of vaginal secretion.
B. Finding trophozoites in a saline wet mount of vaginal discharge. C. Using an acid-fast stain to highlight the parasite.
D. Staining a thin blood smear with common blood stains
Ans. B. Finding trophozoites in a saline wet mount of
vaginal discharge.
Trophozoites
are usually visible in saline mounts of vaginal scrapings.
Cysts
are not present in the T. vaginalis life cycle, and iodine is used primarily to
observe cysts of intestinalprotozoa. Acid-fast stains are used to search for
oocysts of coccidian intestinal parasites, such as Cryptosporidium and
Cyclospora. Thin blood smears are used to diagnose malaria.
