Table 4: Allergic reactions to a field sting.

Group A Group B Group C Total Patients restung 13 10 11 34 maintenance dose of Apis m. 9 6 7 22 maintenance dose of Vespula spp. 4 4 4 12 No local and systemic effects 8 7 8 23 Local large reaction* 3 3 2 8 Systemic anaphylactic reaction§ 1 1 1 3 Grade I — 1 1 Grade II 1 — 1 2 Grade III — — — — Grade IV — — — —

*A large local reaction is defined as a swelling at the site of more than 10 cm lasting for more than 24 hours. §A systemic anaphylactic reaction (SAR) was classified with modified classification of Müller [9].