The nurse monitors for which clinical manifestation in the patient diagnosed with XLA (agammaglobulinemia)?

In patients diagnosed with X-linked agammaglobulinemia (XLA), the body lacks adequate levels of immunoglobulins (antibodies), which are crucial for fighting infections. This immunodeficiency leads to an increased susceptibility to recurrent infections, particularly respiratory infections such as pneumonia, bronchitis, and sinusitis.

The immune system's inability to produce antibodies means that the body cannot effectively respond to pathogens, leading to symptoms such as frequent or severe respiratory infections. Monitoring for this clinical manifestation is vital, as it can significantly impact the patient's health and may require prompt intervention, such as immunoglobulin replacement therapy to help manage and prevent these infections.

The other options, while they may be relevant to different clinical contexts, do not specifically align with the hallmark manifestations of XLA. Low temperature can occur in various states of illness or shock, but it is not characteristic of agammaglobulinemia. Low blood pressure may signify shock or other acute conditions, and diarrhea can occur in numerous gastrointestinal or systemic illnesses but is not directly connected with the absence of antibodies in XLA. Therefore, monitoring for recurrent respiratory infections is the most pertinent clinical manifestation in this context.