Correct Answer: C

Rationale: The correct answer is C. Infants receive passive immunity through antibodies from the mother during pregnancy and breastfeeding, which protect them initially. Choice A is incorrect because a 6-week-old infant born without an immune system would not be able to limit exposure to pathogens effectively. Choice B is incorrect as antibodies produced by colonic bacteria are not a significant source of immunity in infants. Choice D is incorrect as the fetal thymus primarily plays a role in T cell development rather than antibody production during gestation.

Correct Answer: C

Rationale: In cases of exstrophy of the bladder, a moist sterile dressing is the most appropriate choice to protect the exposed bladder tissue. Moist sterile dressings help maintain a clean environment, prevent infection, and promote healing. A loose diaper (Choice A) may not provide adequate protection and may lead to contamination. Dry gauze dressing (Choice B) could adhere to the wound and cause trauma upon removal. Petroleum jelly gauze pad (Choice D) is not ideal as it may not provide the necessary barrier against infection and could potentially cause irritation.

Correct Answer: D

Rationale: The priority nursing intervention for a child with leukemia admitted to the hospital with a fever is to monitor for signs of infection. Children with leukemia are immunocompromised, making them more susceptible to infections. Monitoring for signs of infection helps in early detection and timely intervention, which is crucial in preventing complications. Administering antibiotics (choice A) may be necessary if an infection is suspected or confirmed, but the priority is to assess for signs of infection first. Administering antipyretics (choice B) may help reduce fever, but it does not address the underlying cause, which could be an infection. Providing nutritional support (choice C) is important for overall health but is not the priority when a child with leukemia presents with a fever, as infection needs to be ruled out or managed first.

Correct Answer: D

Rationale: The correct answer is D: Serum immunoglobulin E (IgE) level. An elevated serum IgE level is commonly associated with atopic dermatitis, reflecting an allergic response. Choice A, erythrocyte sedimentation rate, is not typically used to diagnose atopic dermatitis. Choice B, potassium hydroxide prep, is used to identify fungal infections like ringworm, not for diagnosing atopic dermatitis. Choice C, wound culture, is performed to identify microorganisms in a wound, not to diagnose atopic dermatitis.

Correct Answer: C

Rationale: During the stage of protest, children may exhibit distress and cling to familiar figures, resisting interactions with others. The most appropriate nursing intervention is to sit by the crib, offer comfort, and wait until the child's anxiety decreases before proceeding with bathing. This approach allows the child to feel supported and gradually transition to accepting care. Choice A is incorrect because forcing comfort may escalate the child's distress. Choice B is inappropriate as it disregards the child's emotional state and rushes into the bathing procedure. Choice D is not ideal as it suggests delaying care for an extended period, which may not address the child's immediate needs for comfort and hygiene.