The nurse reviews the following orders for a patient admitted with infective endocarditis and fever. The nurse gives the highest priority to which order?

A. Obtain blood cultures from two sites: Obtaining blood cultures before initiating antibiotics is the highest priority because it ensures accurate identification of the causative organism. Administering antibiotics prior to culture collection can result in false-negative cultures, delaying targeted therapy and potentially worsening the infection. B. Schedule a transesophageal echocardiogram: Echocardiography is important for assessing valvular damage or vegetations in infective endocarditis, but it does not take precedence over obtaining cultures, which are critical for guiding immediate antimicrobial therapy. C. Administer ceftriaxone 1g IVPB Q 12 hours: Timely administration of antibiotics is essential, but it should follow culture collection. Administering antibiotics before cultures could compromise diagnostic accuracy, affecting subsequent treatment decisions. D. Give acetaminophen 650mg PO Q 6 hours PRN for fever: Antipyretics relieve symptoms but do not treat the underlying infection. While important for comfort, managing fever is secondary to establishing the causative pathogen and initiating appropriate antimicrobial therapy.