Perianal specimen diagnose:
- A. Trichomonas vaginalis.
- B. Tainia saginata.
- C. Entrobius vermicularis.
- D. Enta.histolytica.
A perianal specimen is used to diagnose C. Entrobius vermicularis (pinworms), not the other options listed.
Here's why:
- Trichomonas vaginalis (A):
This is a sexually transmitted protozoan infection that affects the vagina and urethra, not the perianal area.
- Taenia saginata (beef tapeworm) (B):
This intestinal parasite causes tapeworm infections but is diagnosed through stool examination, not perianal swabs.
- Entamoeba histolytica (D):
This protozoan causes amoebic dysentery and is also diagnosed through stool examination, not perianal swabs.
Entrobius vermicularis (pinworms):
- These small, white worms (around 10mm long) live in the intestines and lay eggs around the anus at night.
- Perianal swabs or tape tests are used to collect the eggs, which are then viewed under a microscope for diagnosis.
- Symptoms of pinworm infection include perianal itching, especially at night, restless sleep, and irritability.
Therefore, if you suspect a pinworm infection, a perianal specimen is the most appropriate diagnostic test.
Additional tips:
- Perianal specimens should be collected first thing in the morning before showering or using the toilet.
- The swab or tape should be applied firmly to the perianal area and then carefully placed in a container for transport to the laboratory.
- Treatment for pinworm infections is usually a single dose of medication prescribed by a doctor.
