Anaphylactic reactions to a psyllium-containing cereal

Area of Science:

• Allergy and Immunology
• Occupational Health
• Food Science

Background:

• Psyllium, a dietary fiber, is used in cereals and laxatives.
• Allergic reactions to psyllium-containing products have been reported.
• Occupational exposure to psyllium dust may predispose individuals to allergies.

Purpose of the Study:

• To investigate allergic reactions to a psyllium-containing cereal.
• To identify specific antibodies (IgE and IgG) to psyllium antigens.
• To assess the risk associated with occupational psyllium exposure.

Main Methods:

• Questionnaire and telephone surveys of 20 women with reported reactions.
• Extraction, quantification, and electrophoresis of psyllium protein fractions.
• Immunoblotting techniques to detect specific IgE and IgG antibodies in patient sera.

Main Results:

• All 20 women had evidence of atopy and specific IgE/IgG antibodies to psyllium.
• Symptoms included wheezing, throat/chest tightness, and urticaria, often requiring emergency care.
• Most subjects had prior exposure to psyllium, often occupationally.

Conclusions:

• Occupational exposure to psyllium dust sensitizes individuals to psyllium.
• Sensitized individuals are at high risk for allergic reactions to ingested psyllium products.
• Prompt medical attention is crucial for managing severe allergic reactions.