Final answer:
The laboratory finding that requires follow-up by the nurse for a client with a burn injury prescribed with silver sulfadiazine is a low white blood cell count.
Step-by-step explanation:
The laboratory finding that requires follow-up by the nurse for a client with a burn injury prescribed with silver sulfadiazine is a white blood cell count of 3000 mm3 (3.0 × 109/L). A white blood cell count below the normal range can indicate a decreased immune response, which is a concern in burn patients as they are at a higher risk for infection.