An adult client is admitted with AIDS and oral candidiasis manifested by several painful mouth ulcers. The nurse delegates oral care to the unlicensed assistive personnel (UAP) and discusses how to assist the client. Which instruction should the nurse provide the UAP?

Choice A reason: A positive PPD skin test indicates TB exposure but not active disease, as it detects immune response to TB antigens. False positives occur in vaccinated or previously exposed individuals, making it insufficient to confirm active TB, requiring sputum culture for definitive diagnosis.

Choice B reason: Chest x-ray or CT shows lung abnormalities suggestive of TB, like cavitary lesions, but is not confirmatory. Imaging supports diagnosis but cannot identify Mycobacterium tuberculosis, making sputum culture the gold standard for confirming active infection, as imaging lacks specificity.

Choice C reason: Sputum culture positive for Mycobacterium tuberculosis confirms TB, as it directly isolates the pathogen. This test identifies active infection with high specificity, distinguishing TB from other lung diseases, making it the definitive diagnostic tool to review for accurate diagnosis and treatment.

Choice D reason: Hemoccult test on sputum detects blood, indicating hemoptysis, a TB symptom, but not the pathogen. It does not confirm TB, as bleeding can occur in other conditions, making sputum culture essential for identifying Mycobacterium tuberculosis and confirming the diagnosis.

Choice A reason: Testing for Helicobacter pylori is irrelevant, as vomiting and anorexia 8 days post-laparotomy suggest postoperative complications like ileus or obstruction, not peptic ulcer disease. H. pylori causes gastritis, not acute surgical issues, making this action inappropriate for the client’s current presentation.

Choice B reason: Giving intravenous fluids is critical, as vomiting and refusal to eat post-laparotomy risk dehydration and electrolyte imbalances. Fluids restore volume, stabilize hemodynamics, and support recovery from potential ileus or obstruction, addressing the client’s acute symptoms and preventing further deterioration.

Choice C reason: Inserting a rectal tube is inappropriate, as vomiting indicates upper gastrointestinal issues, not lower bowel obstruction. Post-laparotomy vomiting suggests ileus or adhesion, and rectal tubes do not address gastric or small bowel complications, making this action ineffective.

Choice D reason: Monitoring hemoglobin assesses blood loss, relevant post-laparotomy, but vomiting and anorexia prioritize fluid replacement to prevent dehydration. Hemoglobin checks are secondary, as fluid loss is the immediate threat, making IV fluids the more urgent intervention for stabilization.