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Vol. 44. Issue 1.
Pages 18-22 (January - February 2016)
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Vol. 44. Issue 1.
Pages 18-22 (January - February 2016)
Original Article
DOI: 10.1016/j.aller.2015.03.001
Molecular-based diagnosis of respiratory allergic diseases in children from Curitiba, a city in Southern Brazil
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L.M.L. Araujoa,
Corresponding author
laura.araujo80@gmail.com

Corresponding author.
, N.A. Rosarioa, A. Marib
a Federal University of Parana, Brazil
b Center for Molecular Allergology, IDI-IRCCS, Rome, Italy
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Tables (2)
Table 1. Frequency of sensitisation in 101 patients determined by skin prick testing.
Table 2. Frequency of sensitisation in 101 children and adolescents determined by microarray (ISAC system) and median sIgE levels of each allergen.
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Abstract
Background

Prevalence of respiratory allergic diseases has increased worldwide. Identification of the aeroallergens involved in allergenic sensitisation is important for diagnosis, treatment and prevention.

Objective

To verify the molecular pattern of sensitisation to aeroallergens in patients with allergic respiratory diseases using microarray technique for specific IgE antibody detection.

Methods

Cross-sectional study of 101 children with allergic rhinitis was followed in an outpatient clinic. All patients had positive skin prick tests (SPT) to at least one of the following antigens: Dermatophagoides pteronyssinus, Blomia tropicalis, Blattella germanica, Lolium multiflorum, and dog and cat epithelium. Serum specific IgE antibodies (sIgE) to mites, animal epithelia, fungi, cockroach and pollens components were determined by ImmunoCAP ISAC.

Results

sIgE to group 1 and 2 mite allergens showed higher positive rates: Der p 1 (74.2%), Der p 2 (73.3%), Der f 1 (74.2%), Der f 2 (72.3%). sIgE to animal epithelia were less frequent, Can f 1, Can f 2, Can f 3 in 4.9%, 2.9%, 1.9% respectively and Fel d 1, Fel d 2, Fel d 4 in 16.8%, 0.9% and 1.9%. respectively. Sensitisation to fungi and cockroach were rare, except for Bla g 7, to which 16.8% were positive. There was no significant recognition for tree pollens group. For grass, sIgE were detected to Cyn d 1 in 16.8%, Phl p 1 and Phl p 4 in 14.8% and 12.9%, respectively.

Conclusion

Knowing that the pattern of allergic sensitisation varies according to environment and population, our results reinforce the need for local studies, using molecular-based diagnosis.

Keywords:
Molecular diagnostic testing
Allergens
Asthma
Rhinitis
Children

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