A nurse is caring for a client who has poison ivy dermatitis.
Which of the following treatment options should the nurse suggest the client use within the first few days to alleviate pruritus?

Type I hypersensitivity reactions are mediated by IgE antibodies and can escalate upon re-exposure. Nurses must apply knowledge of immunological sensitization to educate parents about the risks of anaphylaxis, emphasizing that previous mild reactions do not predict future severity in allergies.

Choice A rationale

Sensitization occurs during the first exposure, where the body produces IgE. Subsequent exposures can trigger a more rapid and massive mast cell degranulation, potentially leading to systemic anaphylaxis, even if the initial reaction was limited to a rash.

Choice B rationale

Allergy testing is often essential to confirm the allergen and determine the level of sensitivity. Suggesting it is not required is dangerous, as formal diagnosis is necessary to develop an emergency action plan and prescribe life-saving epinephrine.

Choice C rationale

Attributing a rash following peanut ingestion to simple skin irritation is a dangerous assumption. In the context of a known high-risk allergen, any cutaneous manifestation must be treated as a potential systemic allergic response until proven otherwise.

Choice D rationale

Continuing to provide the allergen is contraindicated and life-threatening. Avoidance is the primary management strategy for food allergies to prevent the progression from localized cutaneous symptoms to total respiratory collapse or cardiovascular failure during subsequent exposures..

Analyzing cerebrospinal fluid changes in meningitis requires knowledge of pathophysiology and microbial metabolism. One must understand how pathogens cross the blood-brain barrier and the metabolic requirements of bacteria compared to normal physiological states in the central nervous system during acute infection.

Choice A rationale

Liver glucose production, or gluconeogenesis, is typically increased during the stress of systemic infection due to cortisol and glucagon. A decrease in CSF glucose is a localized metabolic phenomenon within the subarachnoid space rather than hepatic failure.

Choice B rationale

Bacteria and leukocytes in the CSF consume glucose as a primary energy source for metabolism and replication. Normal CSF glucose is 40 to 70 mg/dL, but in bacterial meningitis, this level drops significantly as pathogens utilize it.

Choice C rationale

While the blood-brain barrier is affected during inflammation, it generally becomes more permeable, not less. The low glucose level is not due to a blockage of entry but rather the rapid consumption of glucose once it enters.

Choice D rationale

While systemic glucose uptake might change during illness, it does not explain the specific drop in CSF levels relative to blood levels. The hallmark of bacterial meningitis is the decreased ratio of CSF glucose to serum glucose..