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Table 2 Questionnaire results (numbers) from Shetland pony mare and Icelandic horse cases of insect bite hypersensitivity

From: Genome-wide association study of insect bite hypersensitivity in two horse populations in the Netherlands

  Shetland pony mares Icelandic horses
Trait   
Age at onset   
Younger than 2 years 10 1
2 to 5 years 64 30
6 to 10 years 16 13
11 years or older 2 6
Unknown 11 9
Duration IBH   
1 year 18 -
2 years 23 -
3 years or more 57 59
Unknown 5 -
Onset of symptoms   
Spring 70 48
Summer 26 6
Autumn 1 -
Unknown 6 5
Disappearance of symptoms   
Summer 7 -
Autumn 84 53
Winter 1 1
Chronic 3 -
Unknown 8 5
Severity of symptoms over years   
Increases 9 1
Decreases 7 7
Remains equal 48 10
Varies 22 35
Unknown 17 6
Severity of itch   
Mild 26 26
Moderate 33 22
Severe 38 9
Unknown 6 2
Preventive or curative measures   
Yes 85 58
No 18 1
Applied measures a   
Eczema blankets 28 51
Local treatment with oil or cream 72 45
Insecticide 22 25
Related to nutrition 3 17
Stabling 4 5
  1. aIn several cases more than one preventive measure was applied; sum of applied measures per breed therefore exceeded the total number of cases per breed.