Table 1

Allergy testing results

Skin prick testingSpecific IgE
AllergenWheal (mm)FlareIU/mlGrade
In the skin prick test histamine produced a 6 mm wheal and ++ flare, and saline produced a 0 mm wheal and no flare. Results were those seen 15 minutes after using ALK standardised lancets and skin prick test reagents. The specific IgE tests were performed by Sheffield Protein Reference Unit. When Quorn was used as the allergen a small piece of fresh quorn burger was mixed with saline, and a single drop of liquid from the mixture was put on the patient’s forearm as with the other skin prick reagents. No specific IgE was detected to two other fusarium species, F culmorium and F oxysporum. Alternaria alternata, Aspergillus fumigatus, and Cladosporium herbarm are reported to crossreact with Quorn. There was a heavy growth of Aureobasidium pullulans in the patient’s home (no tests available to other species isolated).
ND, not done.
Grass pollen mix3++NDND
Cat dander4++NDND
Dermatophagoides pteronyssinus 0NDND
Dermatophagoides farinae 0NDND
Fresh Quorn mixed with saline7++NDND
Alternaria alternata 2+4.13
Aspergillus fumigatus 10.41
Cladosporium herbarm 10.61
Aureobasidium pullulans NDND0.82