A nurse is admitting a 6-month-old infant who has dehydration. Which of the following amounts of urinary output should indicate to the nurse that the treatment has corrected the fluid imbalance?

Choice A reason: Pyloric stenosis is not a manifestation of inadequate motility of part of the intestine, but rather a hypertrophy of the pyloric muscle, which causes gastric outlet obstruction and delayed gastric emptying. Pyloric stenosis typically presents with projectile vomiting, dehydration, weight loss, and a palpable olive-shaped mass in the abdomen.

Choice B reason: Hirschsprung's disease is a manifestation of inadequate motility of part of the intestine, as it is caused by the absence of ganglion cells in the distal colon, which results in a lack of peristalsis and a functional obstruction. Hirschsprung's disease typically presents with constipation, abdominal distension, failure to thrive, and enterocolitis.

Choice C reason: Encopresis is not a manifestation of inadequate motility of part of the intestine, but rather a condition in which a child over 4 years of age involuntarily passes stool, usually due to chronic constipation and fecal impaction. Encopresis typically presents with soiling of the underwear, abdominal pain, low self-esteem, and behavioral problems.

Choice D reason: Enterocolitis is not a manifestation of inadequate motility of part of the intestine, but rather an inflammation of the mucosa of the small and large intestines, which can be caused by various infections, allergies, or ischemia. Enterocolitis typically presents with diarrhea, fever, abdominal pain, and dehydration.

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.