Which parasite is known for causing bladder infections and is represented by its eggs?

The correct response relates to the significance of Schistosoma mansoni, which is a parasite known for being associated with bladder infections, specifically in the context of schistosomiasis. This condition arises from exposure to infected freshwater snails in regions where the parasite is endemic. The eggs of Schistosoma mansoni can be detected in urine, and their presence is a significant indicator of infection.

When Schistosoma mansoni infects the urinary tract, it can lead to symptoms such as hematuria (blood in urine) and potentially serious complications like bladder cancer over time. The life cycle of this parasite includes the release of eggs in the bloodstream, where they then migrate to the urinary system.

In contrast, the other parasites listed—Enterobius vermicularis, Trichuris trichiura, and Ascaris lumbricoides—do not typically cause bladder infections nor are they represented specifically by their eggs in the context of urinary symptoms. Enterobius vermicularis is linked with pinworm infections in the intestines; Trichuris trichiura is associated with whipworm infections affecting the intestines; and Ascaris lumbricoides is known for causing ascariasis, primarily affecting the gastrointestinal tract.