| [occurrence of allergens on hospital premises]. | the occurrence of allergens from the house-dust mites der p 1, der f 1 and der m, and from dogs (can f 1) and cats (fel d 1) was assessed in viborg hospital. three hundred samples collected in a standardized manner were analysed for allergens by elisa technique. in only one dust sample was the total occurrence of mite allergens marginally above the sensitization threshold level of 2,000 ng mite allergens/g dust. for fel d 1 a threshold level for sensitization or symptoms of 8,000 ng fel d 1/g du ... | 2000 | 10697446 |