A nurse is teaching a group of teenage clients about the use of condoms for the prevention of sexually transmitted infections (STIs). Which of the following statements should the nurse include in the teaching?

Choice A reason:
Hay fever allergy, also known as allergic rhinitis, is primarily associated with the action of Immunoglobulin E (IgE) antibodies and not directly with T-cells. T-cells can contribute to the regulation of the immune response in allergies, but IgE is the main immunoglobulin involved in the typical symptoms of hay fever.

Choice B reason:
Anaphylaxis is a severe, potentially life-threatening allergic reaction that involves the release of large amounts of histamine and other chemicals from mast cells and basophils, often triggered by IgE antibodies. While T-cells can play a role in the sensitization phase of allergy, anaphylaxis itself is not directly caused by T-cells.

Choice C reason:
Transplant rejection is a process in which T-cells play a central role. When a transplant recipient's immune system recognizes the donated organ as foreign, T-cells can mediate the rejection by attacking the transplanted tissue, leading to its failure.

Choice D reason:
Bacterial phagocytosis is primarily the function of phagocytes like neutrophils and macrophages. T-cells are involved in the adaptive immune response and can activate phagocytes, but they do not directly perform phagocytosis.

Choice A reason:
A reddened area over the sacrum is a sign of potential pressure ulcer development, which is a common complication of immobility, especially in bedridden or wheelchair-bound individuals. The sacrum is a prominent bony area that bears weight when a person is sitting or lying down, making it susceptible to pressure ulcers if proper preventative measures, such as regular repositioning, are not taken.

Choice B reason:
Difficulty hearing some types of sounds is not typically a direct complication of immobility. Hearing issues may be related to other health conditions or age-related changes but are not caused by the lack of movement associated with post-stroke immobility.

Choice C reason:
Stiffness in the lower extremities can occur due to immobility, as muscles and joints may become tight when not used regularly. However, this is more of a long-term effect and may not be as immediately concerning as pressure ulcer prevention. Regular range-of-motion exercises can help prevent stiffness.

Choice D reason:
Difficulty moving the upper extremities may be a result of the stroke itself rather than a complication of immobility. While maintaining mobility in all limbs is important, the focus of monitoring should be on complications that arise specifically due to immobility, such as pressure ulcers.