Question

Sexually transmitted disease caused by protozoa is
a. Candidiasis
b. Chlamydiasis
c. Giardiasis
d. Genital warts

Answer 1

Hint: Sexually transmitted diseases are usually caused by the infections which are transmitted sexually, and this are caused by various organisms like fungi, bacteria, virus and protozoans etc.

Complete answer:
There are various sexually transmitted diseases, which are caused by many organisms, but from the above question the STD caused by protozoan is giardiasis.

- Mostly we can observe that STD are mainly caused by bacteria and virus, apart from that so many protozoans and nematodes also cause STD, but they are transmitted in other routes also, rather than sexual routes.

- Giardiasis is usually caused by the protozoan called giardia lamblia, it transmits both in sexual and asexual routes.

- Two forms of giardia that transmit the disease are trophozoite, which is motile in nature and also by the cyst which is stable.

- Trophozoite are usually tetrapod shaped, and they contain two distinct nuclei, whereas it also contains flagella for the movement, where cyst is stable and contains 4 nuclei.

- The transmission of the giardia lamblia mainly by the feco-oral route, it may be caused by eating contaminated food or it may be caused by sexual transmission where one can be active with an infected person.

- Mainly they cause the problem in the stomach that too duodenum and other given options are candidiasis which is fungal infection, which mainly affects the skin and the mucosa.

- Chlamydiasis is usually caused by the bacteria, where the symptoms include vaginal discharge, or swelling of testicles etc mainly occur in young people.

- Where as in genital warts which are seen in genitals in many sexually transmitted diseases caused by different organisms.

So from the above explanation the correct option is Giardiasis.

Note: It is important to make the list of sexually transmitted diseases and causing bacteria, it will be very useful if we divide based on organisms such as bacterial causing, viral causing and protozoal causing, which will be helpful in answering above type of questions very easily.