Correct Answer: C

Rationale: Viral pharyngitis is typically caused by a virus, not bacteria, so a negative throat culture is an expected finding. The presence of petechiae on the chest and abdomen (Choice A) is not a common manifestation of viral pharyngitis. Elevated WBC count (Choice B) is more indicative of a bacterial infection rather than a viral one. Severe hyperemia of the pharyngeal mucosa (Choice D) is a possible finding in pharyngitis but is not specific to viral pharyngitis.

Correct Answer: C

Rationale: Acyclovir is an antiviral medication used to treat herpes virus infections, not tuberculosis. Rifampin, Isoniazid, and Pyrazinamide are all commonly used in the treatment of tuberculosis. Therefore, the nurse should not plan to administer Acyclovir to a client with tuberculosis.

Correct Answer: A

Rationale: Stridor is a high-pitched, harsh respiratory sound that can indicate airway obstruction. It is a serious finding that requires immediate attention as it may lead to respiratory compromise. Copious oral secretions, hoarseness, and sore throat are common but expected findings after endotracheal tube removal and do not typically require urgent intervention.

Correct Answer: A

Rationale: When assessing a client with pulmonary tuberculosis, the nurse should expect lethargy as a common finding. Tuberculosis can cause fatigue and weakness due to the body's efforts to fight the infection. High-grade fever is another common symptom of tuberculosis, not weight gain or dry cough. Weight loss is more typical in tuberculosis due to decreased appetite and systemic effects of the infection. A persistent productive cough with sputum is more characteristic of tuberculosis rather than a dry cough.

Correct Answer: C

Rationale: Confusion is a common manifestation of pneumonia in older adults. It can result from inadequate oxygenation to the brain due to respiratory compromise. Bradycardia, night sweats, and narrowed pulse pressure are not typically specific findings associated with pneumonia and should be further assessed or monitored, but confusion is a key indicator that warrants immediate attention.