Final answer:
The nursing diagnosis that the nurse will likely add to the patient's care plan is Impaired skin integrity.
Step-by-step explanation:
The nursing diagnosis that the nurse will likely add to the patient's care plan is Impaired skin integrity. This diagnosis is appropriate because a bacterial infection in the left lower leg can lead to damage and breakdown of the skin, which can impair its integrity. It is important for nurses to monitor the patient's skin and implement appropriate interventions to prevent further skin damage and promote healing. Other nursing interventions, such as infection control measures, may also be included in the care plan.