A nurse is planning care for a preschooler who has leukemia. After reviewing the child's information, which of the following potential issues should the nurse identify that the child is at risk for developing? (Select all that apply.)

Choice A reason: This test will confirm if your child had a recent streptococcal infection, as it measures the level of antibodies that the body produces against the streptolysin O enzyme, which is produced by some strains of streptococcal bacteria. A high ASO titer indicates a recent or current streptococcal infection, which can trigger rheumatic fever in some children.

Choice B reason: This test will not indicate if your child has rheumatic fever, as it does not measure the inflammation or damage to the heart, joints, or other organs that rheumatic fever can cause. Rheumatic fever is diagnosed based on the presence of two major or one major and two minor criteria, as well as evidence of a preceding streptococcal infection.

Choice C reason: This test will not indicate if your child has a therapeutic blood level of an aminoglycoside, as it does not measure the concentration of this type of antibiotic in the blood. Aminoglycosides are used to treat serious infections caused by gram-negative bacteria, and their blood levels need to be monitored to prevent toxicity and ensure efficacy.

Choice D reason: This test will not confirm if your child has immunity to streptococcal bacteria, as it does not measure the level of protective antibodies that can prevent future infections. ASO antibodies are not protective, but rather indicate a past or present exposure to streptococcal bacteria.

Choice A reason: Recurrent epigastric pain is not a complication of peptic ulcer disease, but rather a common symptom of it. Peptic ulcer disease is the erosion of the mucosal lining of the stomach or duodenum, which can cause pain, burning, or discomfort in the upper abdomen.

Choice B reason: Hyperactive bowel sounds are not a complication of peptic ulcer disease, but rather a normal finding in a child who has not eaten for a while. Hyperactive bowel sounds indicate increased peristalsis, which can be caused by hunger, stress, or infection.

Choice C reason: Yellowish-red emesis is a complication of peptic ulcer disease, as it indicates bleeding from the ulcer. Bleeding can occur when the ulcer erodes the blood vessels or the protective layer of the mucosa. Yellowish-red emesis means that the blood has been partially digested by the stomach acid, giving it a coffee-ground appearance.

Choice D reason: Melena stool is a complication of peptic ulcer disease, as it indicates bleeding from the ulcer. Melena stool is black and tarry, and it has a foul odor. It means that the blood has passed through the entire digestive tract, and has been altered by the intestinal bacteria and enzymes.