Positive challenge to linseed oilcake in chemist

Agent	Linseed oilcake (Linum usitatissimum)
Job	research chemist in biopolymer plant
Specific IgE	strong positive  linseed 100 iu/ml with immunoCAP
Skin prick test	positive 1mg/ml
Non-specific reactivity	Histamine 14mg/ml post lactose challenge (normal) and 1.35 mg/ml post linseed
Serial Peak Flow	not done
Induced sputum	Eosinophils 1% pre and 19% post alinseed challenge
Specific Challenge	Dual asthmatic reaction to linseed 1:1000 tipped for 25 minutes with negative lactose control
Follow-up	no record

References

	Vandenplas O, D'Alpaos V, César M, Collet S, Tafforeau M, Thimpont J, Occupational asthma caused by linseed oilcake, Allergy, 2008;63:1250-1251,

	Charpin J, Zafiropoulo A, Luccioni R, Occupational asthma in the fat bodies industry, Pneumon Coer, 1966;22:513-521,

	Tabart J, Occupational respiratory allergy to oleaginous seeds, Poumon Coeur, 1966;22:523-527,

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