Final answer:
The patient needs further teaching about completing the full course of medication for tuberculosis.
Step-by-step explanation:
The statement by the patient that indicates the need for further teaching is b) 'I will continue to take my isoniazid until I am feeling completely well.'
It is important for the patient to understand that treatment for tuberculosis should be completed as prescribed, even if they start feeling better. Taking the full course of medication is necessary to ensure the complete eradication of the bacteria and preventing the development of drug resistance.
The other options provided by the patient are all correct and indicate a good understanding of tuberculosis prevention and management.