Final answer:
The nurse should inform the client that they will receive additional doses of the medication until delivery to prevent transmission of group beta strep to the newborn.
Step-by-step explanation:
When educating the laboring client who is group beta strep positive about the administration of penicillin, the nurse should include the statement, "You will receive additional doses of the medication until delivery." This is because penicillin is typically given every 4 hours during labor to ensure that the client receives enough of the medication to prevent the transmission of group beta strep to the newborn. It is important to continue the medication until delivery to ensure the maximum effectiveness in preventing infection in the baby.