What preventive measure should a client treated for schistosomiasis be instructed to follow?

A client treated for schistosomiasis should be instructed to avoid entering bodies of fresh water to swim or wade because schistosomiasis is caused by parasitic worms that live in freshwater environments, particularly in certain regions. The larvae of these parasites can penetrate the skin when a person comes into contact with contaminated water. Even after treatment, if a client re-enters these environments, they remain at risk for reinfection.

Preventive measures must focus on reducing exposure to the sources of infection. While increasing water intake, taking daily vitamin supplements, and wearing protective clothing may have their benefits for general health or in specific contexts, they do not directly address the risk of reinfection with schistosomiasis. Therefore, avoiding contact with potentially contaminated freshwater sources is critical to prevent the re-establishment of the infection, making it the most effective preventive measure in this case.