Which finding indicates that the patient's condition is improving?

A. Bacteria:Antibiotics are specifically used to treat bacterial infections. In the case of pharyngitis, antibiotics are appropriate if the infection is caused by Streptococcus pyogenes(Group A strep), which can be confirmed via rapid strep test or throat culture.

B. A fungal infection:Fungal infections are treated with antifungal medications, not antibiotics. Pharyngitis caused by fungi (e.g., Candida) is rare and requires different pharmacologic management.

C. A virus:Viral pharyngitis is the most common cause of sore throat and does not respond to antibiotics. Treating viral infections with antibiotics contributes to antimicrobial resistance and unnecessary side effects.

D. Protozoa:Protozoal infections typically affect the gastrointestinal or urogenital tract and are not a cause of pharyngitis. They are treated with antiparasitic agents, not antibiotics.

A. Retractions on assessment:Retractions suggest increased respiratory effort and are a sign of respiratory distress. Their presence indicates that the airway is still obstructed or the patient is struggling to breathe, suggesting the bronchodilator has not been effective.

B. Chest tightness:Chest tightness is a subjective symptom often associated with bronchospasm or airway constriction. If it persists after bronchodilator use, it signals continued respiratory compromise and inadequate relief from the medication.

C. Use of accessory muscles:Use of accessory muscles indicates labored breathing and ongoing difficulty with ventilation. Effective bronchodilation should reduce the work of breathing and minimize reliance on these muscles.

D. SpO₂ increased from 87% to 94%:An increase in oxygen saturation indicates improved gas exchange and oxygenation, reflecting that the bronchodilator has successfully opened the airways. This is a measurable and objective sign of medication effectiveness.