Table 1

Characteristics of subjects and reactions

Subject no.	Duration of exposure (years)	Duration of symptoms (years)	Atopic status (years)^*	Specific prick tests	FEV₁ (% pred)	PC20 (mg/ml)	Specific reactions
1	1.4	1	+	+Lactoserum (10 mg/ml)+Casein (1 mg/ml)	87	1.3	Immediate (10 min; 28%) lactoserum
1	1.4	1	+	+Lactoserum (10 mg/ml)+Casein (1 mg/ml)	87	1.3	Late (240 min; 33%) casein^†
2	26	2.5	+	ND lactoserum+Wheat flour	77	0.8	Immediate (10 min; 29%) lactoserum
2	26	2.5	+	ND lactoserum+Wheat flour	77	0.8	Immediate (10 min; 23%) wheat flour
3	6	1	+	+Camomile (10 mg/ml)+Ginger (10 mg/ml)	85	7	Immediate (10 min; 24%) camomile^‡
3	6	1	+	+Camomile (10 mg/ml)+Ginger (10 mg/ml)	85	7	Immediate (20 min; 32%) ginger
4	10	7	+	+Guar gum (10 mg/ml)+Wheat flour	118	4	Immediate (20 min; 23%) guar gum
4	10	7	+	+Guar gum (10 mg/ml)+Wheat flour	118	4	Immediate (10 min; 20%) wheat flour
5	11	1	+	−Lactoserum (10 mg/ml)+Wheat flour	84	1.6	Immediate (10 min; 20%) lactoserum
5	11	1	+	−Lactoserum (10 mg/ml)+Wheat flour	84	1.6	Immediate (10 min; 22%) wheat flour

↵* Atopic status: + if one or more positive prick test reactions to a battery of 15 common aeroallergens; the wheat flour extract used was a commercial preparation at a dilution of 1:10 (Omega, Montreal, Canada).
↵† Immediate fall in FEV₁ of 13% followed by the late reaction.
↵‡ Immediate reaction followed by a late fall in FEV₁ of 16%.
FEV₁, forced expiratory volume in one second; ND, not done; PC20, concentration of methacholine causing a fall of 20% in FEV₁.