What priority instruction should the nurse include in the teaching plan for a pregnant client with a positive group B Streptococcus (GBS) test?

The most important instruction for a pregnant client with a positive group B Streptococcus (GBS) test is that she will need to take antibiotics during labor. This is crucial because the administration of prophylactic antibiotics during labor can significantly reduce the risk of transmitting GBS to the newborn, which can lead to severe infections, including meningitis or sepsis.

While it is true that the information will be recorded in the client's prenatal record, ensuring that the labor and delivery staff is reminded of this finding helps to facilitate the appropriate care during delivery. This proactive communication is essential because not all staff may have immediate access to the prenatal records, and it ensures that antibiotic therapy is administered as needed for the safety of both the mother and the baby.

The other options downplay the importance of the GBS result or suggest a lack of action or concern, which could potentially place the newborn at risk. It's vital to prioritize knowledge about GBS and its implications during labor and delivery to ensure appropriate care is implemented.