A nurse is caring for a group of children. Which of the following children should the nurse recognize as at risk for developing acute poststreptococcal glomerulonephritis?

A. Acute poststreptococcal glomerulonephritis (APSGN) occurs as a delayed immune response to infection with group A beta-hemolytic streptococcus, commonly following skin infections (impetigo) or pharyngitis. Children between 5 and 12 years old are at highest risk. Therefore, a child recovering from impetigo is at significant risk for developing APSGN. B. Appendicitis is typically caused by obstruction and bacterial infection of the appendix, not by streptococcal infection. It is not associated with poststreptococcal complications such as glomerulonephritis. C. Pyloric stenosis is a condition involving hypertrophy of the pyloric muscle, leading to gastric outlet obstruction. It is not related to streptococcal infections and does not increase the risk for APSGN. Additionally, APSGN is rare in infants this young. D. Pregnancy itself does not increase the risk of developing APSGN. The condition is specifically linked to recent streptococcal infections, which are not indicated in this scenario.