# A nurse is screening a healthcare worker for occupational allergies. Which assessment finding would be most indicative of a latex allergy?

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> subject: Adult Health

## 문제

A nurse is screening a healthcare worker for occupational allergies. Which assessment finding would be most indicative of a latex allergy?

The nurse is evaluating a patient's history of allergic reactions to identify potential latex sensitivity.

## 보기

1. History of reactions to bananas, avocados, and kiwi fruits **✔ 정답**
2. Family history of seasonal allergies and asthma
3. Previous reaction to penicillin antibiotics
4. Sensitivity to nickel jewelry and metal objects

**정답: 1**

## 해설

History of reactions to bananas, avocados, and kiwi fruits is most indicative of latex allergy due to cross-reactivity with latex proteins. Other options describe family history, penicillin allergy, or nickel sensitivity, which are not specific to latex.

## 심화 해설

Correct Answer: 1. History of reactions to bananas, avocados, and kiwi fruits

This assessment finding is the most indicative of a latex allergy due to a well-documented immunological phenomenon known as latex-fruit syndrome (LFS). This syndrome describes the cross-reactivity between allergens found in natural rubber latex (NRL) and certain plant-derived foods.

The underlying mechanism involves IgE antibody cross-reactivity. The immune system of a sensitized individual produces IgE antibodies that target specific protein structures (epitopes) present in NRL. Because structurally similar proteins, particularly chitinases and other defense-related proteins, are found in a specific group of fruits, the same IgE antibodies can recognize and bind to these fruit allergens, triggering a hypersensitivity reaction [2][4].

The prevalence of this association is significant. Research indicates that 30-50% of individuals with a confirmed NRL allergy also exhibit hypersensitivity to certain plant-derived foods, most notably freshly consumed fruits [2][4]. The fruits most classically implicated in this syndrome include banana, avocado, kiwi, and chestnut [4]. A patient reporting a history of reactions to this specific cluster of foods presents a high pretest probability for an underlying latex allergy, making this the most critical screening finding.

Analysis of Other Options

Option 2: Family history of seasonal allergies and asthma.

While a personal or family history of atopy (e.g., allergic rhinitis, asthma) can indicate a general predisposition to developing IgE-mediated allergies, it is not specific to latex allergy. Latex-fruit syndrome is a direct, cross-reactive response to specific proteins, not a general atopic tendency. This finding is nonspecific and would not be the most indicative assessment finding for a latex allergy .

Option 3: Previous reaction to penicillin antibiotics.

An allergy to penicillin is a distinct Type I hypersensitivity reaction to a specific drug metabolite and has no immunological cross-reactivity with NRL proteins. This finding is a separate, unrelated allergy and does not serve as a predictor for latex sensitivity.

Option 4: Sensitivity to nickel jewelry and metal objects.

This finding is most indicative of contact dermatitis, typically a Type IV delayed hypersensitivity reaction mediated by T-cells, not IgE antibodies. The pathophysiology is fundamentally different from the immediate, IgE-mediated Type I hypersensitivity that characterizes latex allergy and latex-fruit syndrome. There is no immunological link between nickel sensitivity and NRL allergy.References (research sources)

- [2]Latex Fruit Syndrome and Periodontitis - A Missing Link.Research articleMenon N, Hema D, Aathilingaperumal S, Balaji A, Suhasini J. (2024) · DOI: 10.4103/jpbs.jpbs_504_24

- [4]Latex Fruit Syndrome as a Case of a Lower GI Bleed.Case reportZinabu SW, Mohammed A, Ayele GM, Kuruvilla R, Ramall M, Kerolle E, Michael MB. (2024) · DOI: 10.7759/cureus.65002

## 임상 시나리오

Latex-Fruit Syndrome ScreeningIdentifying Cross-Reactivity in Occupational Health
A history of reactions to banana, avocado, or kiwi is the most specific screening indicator for a latex allergy. This occurs in 30-50% of latex-allergic individuals due to IgE cross-reactivity with similar plant defense proteins.

Other high-risk foods include chestnut, papaya, and tomato. The reaction is typically immediate and can range from oral itching to anaphylaxis.

CautionA negative fruit history does not rule out latex allergy. Always correlate with occupational exposure and consider a latex-specific IgE blood test or skin prick test for confirmation.

## 핵심 개념

- **Latex-Fruit Syndrome** — A clinical condition where IgE antibodies cross-react between natural rubber latex proteins and structurally similar proteins in certain fruits like banana, avocado, and kiwi.
- **Cross-Reactivity** — The ability of a specific IgE antibody to bind to similar allergenic epitopes on different proteins, causing an allergic reaction to multiple substances.
- **Natural Rubber Latex (NRL)** — A milky fluid derived from the Hevea brasiliensis tree, containing proteins that can cause IgE-mediated Type I hypersensitivity reactions.
- **IgE Antibody** — A class of immunoglobulin involved in Type I hypersensitivity reactions, binding to allergens and triggering mast cell degranulation.

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