Final answer:
Trichomonas vaginalis, which causes trichomoniasis, can be found in saliva for both sexes, vaginal fluid for women, and urine for men. It's not typically present in blood. Simultaneous treatment of sexual partners is imperative, with metronidazole or tinidazole being the drugs of choice.
Step-by-step explanation:
Trichomoniasis is a common sexually transmitted infection (STI) caused by the protozoan parasite Trichomonas vaginalis. When considering where T. vaginalis can be found in body fluids, it's essential to understand that the protozoan predominantly inhabits the urogenital tract of both men and women. Therefore, the correct answer is that the Trichomonas vaginalis organism can be found in saliva in both sexes, and specifically in vaginal fluid in women, while men may harbor the parasite in their urine. Blood is generally not a fluid where T. vaginalis is found, unless there is some form of invasive procedure or infection that abnormally connects the urogenital tract with blood vessels.
Diagnosis of trichomoniasis typically involves microscopic evaluation of wet mounts or, more reliably, nucleic acid amplification testing (NAAT). It is important for both sexual partners to be treated simultaneously to prevent reinfection and control the spread of the disease. The standard treatment includes antiflagellate drugs like metronidazole and tinidazole.