Final answer:
Promoting routine STI screening is the priority nursing intervention for STIs with few or no symptoms. This strategy is critical for early identification and treatment to prevent severe health consequences and is especially important for high-risk groups, such as sexually active women under 25.
Step-by-step explanation:
Considering that the majority of sexually transmitted infections (STIs) often have few or no symptoms, the priority nursing intervention that should be included in the plan of care is Promoting routine STI screening. This approach is vital because it enables the identification and treatment of infections before they lead to more serious health issues, even when they are asymptomatic. Initiatives like routine chlamydia testing in sexually active individuals, especially women under 25 or those at high risk, play a crucial role in prevention and treatment of STIs. While antibiotics can cure bacterial STIs and prevent complications such as pelvic inflammatory disease (PID), prophylactic use is not a viable preventative measure. Encouraging abstinence and promoting safe sex practices, including the correct and consistent use of condoms, can also significantly reduce the risk of STI transmission though they are not absolute guarantees against infection.