Final answer:
Trichomoniasis is the only common reproductive tract infection caused by a protozoan; specifically, by Trichomonas vaginalis.
Step-by-step explanation:
The only common infection of the reproductive tract caused by a protozoan is trichomoniasis, which is caused by Trichomonas vaginalis. This is the most common nonviral sexually transmitted infection (STI) and is characterized by a flagellated protozoan that can assume an amoeboid shape when attached to host cells. Although other sexually transmitted diseases like gonorrhea, chlamydia, and syphilis are much more common, they are caused by bacteria and not by protozoans. Trichomoniasis is easily distinguishable from these other infections due to its protozoan origin.
The only common infection of the reproductive tract caused by a protozoan is Trichomoniasis. Trichomoniasis, also known as trich, is a sexually transmitted infection caused by the protozoan parasite Trichomonas vaginalis. This infection is characterized by symptoms such as vaginal discharge, itching, and irritation.