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Table 2 Allergic symptoms and sensitization to maize pollen and common environmental allergens

From: Maize pollen is an important allergen in occupationally exposed workers

  Subject
  1 2 3 4 5 6 7 8
Work-related symptoms (during maize pollination), § yes (+)/no (-)      
Rhinitis + + + + + - - -
Conjunctivitis + + + - + - - -
Urticaria + + + - + - - -
Shortness of breath - + - - + - - -
Latency of allergic symptoms after start of maize pollination (months) 2 120 7 2 1 - 5+ -
Latency of maize pollen allergy after onset of grass pollen allergy (years) $ 10 11 9 6 - - -
Maize pollen         
- extract (IgE kU/l) # 5.48 3.69 1.32 0.70 0.49 - - -
- Western blotting + + + - - - - -
- Skin prick test, pos (+)/neg (-) + + - + n/a + - -
Grass pollen         
- extract (IgE kU/l) # 4.45 0.38 5.61 2.55 - - - -
- Phl p 1 (IgE kU/l) # 1.16 - 1.49 - - - - -
- Phl p 5 (IgE kU/l) # 1.25 - 2.52 0.70 - - - -
- Western blotting + - + - - - - -
- Skin prick test, pos (+)/neg (-) + + + + n/a + + -
Skin prick test with common environ- mental allergens & 1;2;3* 1;9* 1;2; 4;6* 1;2;3;4;5 7;8;9; 10;11;12* n/a 1 1;3* -
  1. (according to work-related symptoms and CAP results (CAP class ≥ 1), subjects 1 to 5 were considered as "maize pollen-allergic")
  2. + = positive result; - = absent or negative result; n/a = not applicable
  3. §the subjects were asked if they had ever suffered from repeated rhinitis, conjunctivitis, urticaria or shortness of breath for at least several weeks due to maize pollination
  4. +in this subject, grass and tree pollen (but not maize pollen) caused allergic symptoms
  5. #significant IgE antibodies (CAP class ≥ 1; > 0.35 kU/l) are bold
  6. $the onset of allergy was based on anamnestic data about first atopy symptoms in connection with exposure to grass pollen or maize pollen
  7. ° this subject could not remember having had any allergic symptoms after exposure to grass pollen
  8. &1 = grass pollen; 2 = cat dander; 3 = pollen of early-, mid- and late-blooming trees; 4 = Dermatophagoides farinae, 5 = Dermatophagoides pteronyssinus, 6 = Alternaria alternata; 7 = dog dander; 8 = Ambrosia; 9 = rye; 10 = nettle; 11 = goosefoot; 12 = plantain
  9. *atopic subject (at least 2 positive skin prick tests to common environmental allergens)