Final answer:
Candidiasis is a fungal infection that can be transmitted sexually. While males may exhibit symptoms, females can remain asymptomatic. The female partner should be tested for candidiasis.
Step-by-step explanation:
Candidiasis is a fungal infection caused by Candida, and it can be transmitted sexually. In the case of a sexually active couple, the male partner has been diagnosed with candidiasis, while the female partner has no symptoms. It is possible for males to exhibit symptoms while females remain asymptomatic. Therefore, it would be appropriate for a nurse to inform the female partner that some males may have symptoms while females can remain asymptomatic, and it is necessary to test her for candidiasis.