A nurse is caring for a 2-month-old child. The child’s provider has ordered a diphtheria, tetanus, and pertussis (DTaP) vaccine to be administered. Which of the following should cause the nurse to question the administration of this vaccine?

Choice A reason: Pinworms (Enterobius vermicularis) are diagnosed via the Scotch tape test, performed in the early morning, when females lay eggs perianally. Tape collects eggs, visible microscopically, confirming infection. This method targets the parasite’s nocturnal egg-laying cycle, ensuring high sensitivity for detecting pinworms in children with perianal itching.

Choice B reason: Stool examination is less effective for pinworm diagnosis, as eggs are laid perianally, not in feces. Obtaining stool at sleep hours is impractical and low-yield. The Scotch tape test directly samples perianal eggs, making stool analysis an incorrect and less reliable method for confirming pinworm infection.

Choice C reason: Blood antigen levels are not used for pinworm diagnosis, as Enterobius vermicularis does not elicit a detectable systemic immune response. Diagnosis relies on visualizing eggs or worms perianally via the Scotch tape test. Blood tests are irrelevant, making this an incorrect diagnostic approach for pinworms.

Choice D reason: Seeing worms in the stool is rare in pinworm infection, as females lay eggs perianally, not in the intestinal lumen. The Scotch tape test is the standard, targeting perianal eggs. Visualizing worms is unreliable and non-specific, making this an incorrect method for diagnosing pinworms in children.

Choice A reason: Side-lying during sleep is not recommended for infants with gastroesophageal reflux, as it may increase reflux risk compared to upright positioning. The American Academy of Pediatrics advises against side-lying due to sudden infant death syndrome risks. Upright positioning post-feeding reduces reflux, making this statement incorrect.

Choice B reason: Breast milk is suitable for infants with gastroesophageal reflux, as it is easily digestible and does not require switching to formula. Both feeding types benefit from upright positioning post-feeding to reduce reflux. This statement is incorrect, as it suggests an unnecessary change, indicating a misunderstanding of reflux management.

Choice C reason: Keeping an infant upright after feedings reduces gastroesophageal reflux by using gravity to prevent stomach contents from flowing back into the esophagus. This minimizes regurgitation and irritation, promoting comfort and reducing complications like esophagitis, making this statement correct and reflective of proper reflux management in infants.

Choice D reason: Thickening formula with oatmeal is not universally recommended, as it may not be suitable for all infants and requires medical guidance. Oatmeal can increase caloric density or cause choking. Upright positioning is a safer, evidence-based practice to reduce reflux, making this statement less accurate than upright positioning.