While changing the dressing of a client who is immobile, the practical nurse (PN) observes a red and swollen wound with a moderate amount of yellow and green drainage and a foul odor. Before reporting this finding to the healthcare provider, the PN should evaluate which of the client's laboratory values?

A. Serum blood glucose level: Elevated glucose can impair wound healing and increase infection risk, particularly in diabetic clients, but it does not provide immediate information about the causative organism of an infected wound. B. Culture for sensitive organisms: Wound cultures identify the specific bacteria causing the infection and determine antibiotic sensitivities. Obtaining or reviewing culture results is essential before reporting to the healthcare provider to guide appropriate antimicrobial therapy. C. C-reactive protein level: CRP is a nonspecific marker of inflammation or infection. While elevated levels indicate systemic inflammation, they do not provide organism-specific information necessary for targeted treatment. D. Serum albumin: Albumin reflects nutritional status, which affects healing, but it does not directly indicate the presence or type of infection. It is supportive data but not essential before reporting an acute wound infection.