Correct Answer: A

Rationale: The transplacental transfer of maternal antibodies supplements the infant's weak response to infection until approximately 3 to 4 months of age. While the infant starts producing immunoglobulin (Ig) soon after birth, it only reaches about 60% of the adult IgG level, 75% of the adult IgM level, and 20% of the adult IgA level by 1 year of age. Breast milk provides additional IgA protection. Although the immune system matures during infancy, full protection against infections is not achieved until early childhood, putting the infant at risk for infections. Choice B is incorrect because maternal antibody protection typically lasts around 3 to 4 months, not until the infant is 12 months old. Choice C is incorrect as infants are not shielded from all infections due to their immature immune system. Choice D is incorrect because while breastfeeding offers extra protection, it does not guarantee complete immunity against infections.

Correct Answer: D

Rationale: The correct answer is 'fifth disease.' Erythema infectiosum, also known as fifth disease, is a parvovirus flu-like illness that is self-limiting but contagious for two to three weeks. Choice A, Kawasaki disease, is a different condition that involves inflammation of the blood vessels, predominantly affecting children. Choices B and C, rheumatic disease and lupus erythematosus, are also different conditions unrelated to erythema infectiosum.

Correct Answer: C

Rationale: The correct answer is that the client's contact lenses might be stained orange. Rifampin has the unusual effect of turning body fluids an orange color. Soft contact lenses might become permanently stained, making this an important side effect for the client to be aware of. Choices A, B, and D are incorrect. There is no documented effect of Rifampin causing the client's urine to turn blue, the client remaining infectious for 48 hours, or the client's skin taking on a crimson glow.

Correct Answer: A

Rationale: When transferring a client from a wheelchair to the bed, the correct procedure is to pull the client toward you, which reduces workload force. By pivoting the client on the unaffected limb, strength is maintained to support the affected limb while moving towards the bed. Choice A is correct because it ensures a safe and effective transfer technique. Choices B, C, and D are incorrect as they involve incorrect positioning and movements that could potentially harm the client or increase the risk of injury. Pulling the client towards you puts less strain on your back and reduces the risk of injury. Pivoting on the unaffected limb ensures better support for the client's affected limb during the transfer process.

Correct Answer: A

Rationale: A gastroenterologist specializes in treating diseases and disorders of the digestive system, including the stomach, intestines, liver, and pancreas. Therefore, clients with digestive system diseases should consult a gastroenterologist. Choices B, C, and D are incorrect because urinary system diseases are managed by urologists, female reproductive system diseases by gynecologists, and nervous system diseases by neurologists.