A nurse is preparing to administer digoxin to a 6-month-old infant. Prior to administering the dose, the nurse measures the apical heart rate. The nurse should withhold the dose if the infant's apical heart rate is less than what rate?

A. "This test will confirm if your child had a recent streptococcal infection."
Explanation:
The anti-streptolysin O (ASO) titer is a blood test used to detect the presence of antibodies against streptolysin O, a toxin produced by group A Streptococcus bacteria. A rise in ASO titers indicates a recent streptococcal infection. It does not confirm rheumatic fever directly but helps in identifying a recent streptococcal infection, which is a predisposing factor for rheumatic fever.
B. "This test will indicate if your child has rheumatic fever."
Explanation: While a positive ASO titer may suggest a recent streptococcal infection, it does not directly indicate rheumatic fever. The diagnosis of rheumatic fever involves a combination of clinical criteria, including evidence of a recent streptococcal infection, along with specific signs and symptoms.
C. "This test will confirm if your child has immunity to streptococcal bacteria."
Explanation: The ASO titer does not measure immunity to streptococcal bacteria. It specifically detects antibodies produced in response to a recent streptococcal infection.
D. "This test will indicate if your child has a therapeutic blood level of an aminoglycoside."
Explanation: The ASO titer is not used to monitor therapeutic blood levels of aminoglycosides. It is specific to detecting antibodies related to streptococcal infections and is not related to aminoglycoside therapy.

A. Rye toast
Explanation: Rye contains gluten, so it is not suitable for individuals with celiac disease. It should be avoided in a gluten-free diet.
B. Rice
Explanation:
Celiac disease is a condition characterized by an immune reaction to gluten, a protein found in wheat, barley, and rye. Individuals with celiac disease must follow a gluten-free diet to manage the condition. Rice is a gluten-free grain and is safe for individuals with celiac disease to include in their diet.
C. Wheat bread
Explanation: Wheat contains gluten, and products made from wheat, such as wheat bread, should be avoided in a gluten-free diet for individuals with celiac disease.
D. Oatmeal
Explanation: Oats themselves are gluten-free, but cross-contamination can occur during processing. Some individuals with celiac disease can tolerate pure, uncontaminated oats, but it's essential to ensure that the oats are labeled gluten-free. Regular oats may be cross-contaminated with gluten-containing grains during processing.