occupational asthma due to chamomile tea dust (new cause)

Agent	Chamomile tea dust (Matricaria chamomilla)
Job	Maintenance worker in tea packing plant
Specific IgE	3.12 iu/ml to chamomile pollen (Immunocap)
Lymphocyte proliferation	not tested
Skin prick test	6mm wheal to chamomile tea extract 10mg/ml
Patch test	not done
Non-specific reactivity	Histamine Pc20 20 mg/ml pre challenge and 8mg/ml post challenge
Serial Peak Flow	not done
Induced sputum	Eosinophils 7.5% 6 hours post chamomile challenge, 0% post black tea
Specific Challenge	immediate reaction to chamomile tea dust for 60 minutes, negative to black and lime tea
Follow-up	not stated

References

	Vandenplas O, Pirson F, D'Alpaos V, Vander Borght T, Thimpont J, Pilette C, Occupational asthma caused by chamomile , Allergy, 2008;63:1090-1092,

	Abramson MJ, Sim MR, Fritschi L, Vincent T, Benke G, Rolland JM, Respiratory disorders and allergies in tea packers, Occup Med (London), 2001;51:259-265,

	Zuskin E, Skuric Z, Respiratory function in tea workers, Brit J Industr Med, 1984;41:88-93,

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