The practical nurse (PN) administers an antibiotic to a client with a respiratory tract infection. To evaluate the medication's effectiveness, what laboratory values should the PN monitor? Select all that apply.

A. Urinalysis is not directly related to evaluating the effectiveness of an antibiotic for a respiratory tract infection. B. Sputum culture and sensitivity are crucial in determining the specific bacteria causing the infection and assessing the antibiotic’s effectiveness in eradicating the pathogen. C. Prothrombin time is related to blood clotting and is not relevant to monitoring the effectiveness of an antibiotic for a respiratory infection. D. Serum potassium is important for monitoring electrolyte balance but does not directly evaluate the effectiveness of an antibiotic. E. White blood cell count is a key indicator of infection and inflammation; a decrease in WBC count suggests that the antibiotic is effectively combating the infection. F. Capillary glucose monitoring is more relevant to diabetic management and is not used to evaluate antibiotic effectiveness.