scholarly journals Sensitization to cat and dog components and prediction of symptoms in cat-sensitized children.

2020 ◽  
Author(s):  
Katarzyna Smejda ◽  
Joanna Jerzyńska ◽  
Daniela Podlecka ◽  
Agnieszka Brzozowska

Abstract Background: Sensitization to cat and/or dog allergens during childhood represents a risk factor for the development of allergic diseases later in life.Material and Methods: The study investigated the association of patterns of sensitization to cat and dog allergen components with clinical symptoms of allergy to these furry animals among cat-sensitized children. It included 50 children aged 5-17 years who showed sensitization to cat in the skin prick test. They were considered to have cat allergy if they suffered from one or more allergy symptoms when being exposed to contact with a cat. The children were evaluated for the presence of bronchial asthma, atopic dermatitis and allergic rhinitis. Their mothers completed a questionnaire on pet exposure at home. Levels of serum IgE cat epitopes Fel d (1, 2, 4), as well as dog components Can f (1, 2, 3, 5) were measured in all the studied children.Results: Respiratory symptoms following exposure to the cat allergen were most common in children with Fel d 2 epitope (p = 0.041). After contact with a dog, respiratory symptoms were most common in children with Can f 1 epitope (p = 0.042), eczema in children with sensitization to both Can f 1 (p = 0.009) and Can f 2 (p = 0.002), whereas eye symptoms occurred mostly in children with Can f 3 (p = 0.039).Conclusions: Molecular diagnosis in patients with pet allergy may help clinicians to predict clinical symptoms and their severity.

2020 ◽  
Vol 19 (4) ◽  
pp. 316-324
Author(s):  
Leyla S. Namazova-Baranova ◽  
Kamilla Y. Efendieva ◽  
Julia G. Levina ◽  
Elena A. Vishneva ◽  
Anna A. Alekseeva ◽  
...  

The prevalence of allergies to domestic animals increases due to the increase in the number of pets worldwide, followed by serious medical and social problems. Domestic cat (Felis domesticus) is one of the most common pets and one of the most frequent (after dust mite) source of indoor allergens and risk factor for bronchial asthma and allergic rhinitis. This review collects relevant information on the issues of hypersensitivity to cat allergens (the term «cat allergy» will be used later). The authors consider issues of diagnosis, treatment and prevention of this condition. Special attention is given to the management of patients with cat allergies and particularly usage of special nutrition for cats that can reduce the level of the main cat allergen Fel d 1 in the environment. Whereas, this leads to decrease of allergic diseases symptoms severity.


2003 ◽  
Vol 91 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Unnur Steina Björnsdottir ◽  
Sigridur Jakobinudottir ◽  
Valgerdur Runarsdottir ◽  
Sigurdur Juliusson

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Andres Sánchez ◽  
Ricardo Cardona ◽  
Marlon Munera ◽  
Victor Calvo ◽  
Manuela Tejada-Giraldo ◽  
...  

Background. IgE sensitization (atopy) to pets is commonly evaluated using pet dander extracts. However, the diagnosis by components seems to be more adequate to evaluate the clinical relevance (allergy) of sIgE sensitization. Objective. To study the association between IgE sensitization to pet allergen components and clinical symptoms. Methodology. Dander extracts and sIgE levels to pet components (Can f 1, Can f 2, Can f 3, Can f 5, Fel d 1, Fel 2, and Fel 4) were measured in a rhinitis group (n=101) and a control group (n=68). Nasal provocation tests with pet extract were done in patients with atopy to pets. Results. Dog (34.6% vs. 23.5%) and cat dander (26.7% vs. 8.8%, p=0.05) IgE sensitization was frequent among rhinitis and no-rhinitis subjects, and it was similar to dog (29.7% vs. 20.5%) and cat (18.8% vs. 8.8%) components. Polysensitization for dog (3.1, 95% CI: 1.5 to 6.1, p<0.001) or cat (2.5, 95% CI: 0.8 to 8.0, p=0.01) components was the principal risk factor for a positive nasal provocation test. Additionally, positive nasal provocation test with one animal increased the risk of atopy and positive nasal provocation test to others animals. Pet ownership or asthma was not associated with increased risk of atopy or positive nasal provocation test. Conclusions. Sensitization to pet dander extract identifies atopic patients, but its utility to predict clinical relevance is poor. Allergenic components could help to define the clinical relevance of sensitization to furry animals and could reduce the need for provocation test.


2016 ◽  
Vol 8 (11) ◽  
pp. 24 ◽  
Author(s):  
Dan Norbäck ◽  
Gui-Hong Cai ◽  
Ivan Kreft ◽  
Gunilla Wieslander

<p><strong>PURPOSE:</strong> To study associations between cat, dog and horse allergens in day care centres and fractional exhaled nitric oxide (FeNO), eosinophilic cationic protein (ECP) in serum, lung function (FEV<sub>1</sub>) and dyspnoea in day care centre staff. Totally 62 subjects, all females, from five Swedish day care centres participated (participation rate 90%).</p><p><strong>METHODS:</strong> Dust was collected by vacuum cleaning and Petri dish sampling and analysed for cat (Fel d 1), dog (Can f 1) and horse (Ecu cx) allergens by ELISA. Dyspnoea was measured on an analogue rating scale. FeNO, serum ECP and symptom ratings were log-transformed. Associations were analysed by linear mixed models, adjusting for personal and home environment factors.<em> </em></p><p><strong>RESULTS:</strong><em> </em>Geometric mean (GM) value for allergens in vacuumed dust were 1199 ng/g for Fel d 1, 666 ng/g for Can f 1 and 478 U/g for Equ cx, respectively. GM value for allergens in Petri dish samples (ng/m<sup>2</sup> per day) was 29.8 for Fel d 1 and 9.1 for Can f 1, respectively. Cat allergen (Fel d 1) were positively associated with FeNO both in vacuumed dust (p=0.03) and in Petri dish samples (p=0.03). Dog allergen (Can f 1) in Petri dish samples was negatively associated with FeNO (p=0.02). Horse allergen (Equ cx) in vacuumed dust was negatively associated with FeNO (P=0.03).</p><p><strong>CONCLUSION:</strong> Cat, dog and horse allergens were commonly found and cat allergen in day care centres can be a risk factor for lower airway inflammation, measured as FeNO, while dog and horse allergens were associated with lower FeNO.</p>


2004 ◽  
Vol 114 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Samuel J Arbes ◽  
Richard D Cohn ◽  
Ming Yin ◽  
Michael L Muilenberg ◽  
Warren Friedman ◽  
...  

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Hind Serhane ◽  
Lamyae Amro ◽  
Hafsa Sajiai ◽  
Abdelhaq Alaoui Yazidi

Background. Date palm’s pollen has been identified as a source of allergy; the rate of sensitization of this pollen is between 6 and 29%. Objective. To determine the prevalence of sensitization to date palm in Marrakesh and to identify the clinical profile. Patients and Methods. This study is based on a questionnaire and the prick test on 7 allergens, in population aged 5 years and above with clinical symptoms suggesting allergic diseases, from November 2012 to February 2013 in Marrakech. Results. We included 468 patients (women: 79.5%). The prick tests were considered interpretable in 467 cases. The prevalence of skin sensitization to pollen of date palm was 6.6%. The 31 cases of sensitization to date palm involved 7 men and 24 women with an average age of 37.5 years. Cutaneous monosensitization to date palm’s pollen was observed in 2 cases. Asthma, rhinitis, and conjunctivitis were recorded, respectively, in 48.4%, 93.5%, and 67.7%. Conclusion. Skin sensitization to pollen of date palm does not seem unusual among allergic patients in Marrakech and is comparable to that found in Casablanca (7%), Barcelona (6.6%), and Cartagena (6.1%).


Author(s):  
G.S. Dzhambekova ◽  
S. Katsamaki ◽  
V.F. Garib

Молекулярная аллергодиагностика позволяет выявлять сенсибилизацию к большому спектру респираторных аллергенов, что является важным в диагностике аллергической астмы. Более того, на основании IgEреактивного профиля, выявляемого в раннем возрасте, можно прогнозировать развитие аллергических респираторных заболеваний еще на доклиническом этапе. Целью пилотного проекта явилось создание паспорта сенсибилизации школьника с использованием мультиплексной панели для возможности выявления группы риска по развитию астмы у детей раннего школьного возраста. Материалы и методы. Родители 33 учеников, обучающихся во втором классе гимназии города Ташкента, были опрошены по вопроснику ISAAC на наличие клинических проявлений респираторных заболеваний у их детей. Сыворотки крови их детей были протестированы на наличие IgE к различным аллергенным молекулам при помощи исследовательского аллергочипа MeDALL. Результаты. 30 детей были сенсибилизированы как минимум к одному аллергену, и из этого числа 30 родились путем операции кесарева сечения. Всего было распознано 68 аллергенных молекул из 176, расположенных на микрочипе MeDALL. 80 сенсибилизированных детей имели подлинную полисенсибилизацию к 3 и более мажорным аллергенам. У 18 детей были выявлены IgE к бытовым молекулам риска развития астмы, таким как Alt a 1, Bla g 1, Bla g 2, Can f 1, Fel d 1. Заключение. В целом клинические проявления в виде хрипов и обструкции были выявлены у 60 сенсибилизированных детей, но только 40 таких детей находились под наблюдением аллерголога или получали симптоматическое лечение. У 20 уже сенсибилизированных детей клиническая симптоматика отсутствовала. Молекулярное тестирование профиля IgEсенсибилизации и создание аллергопаспорта позволяют определить группу детей с риском развития астмы. Данная информация может быть использована для своевременного назначения терапии и вторичной профилактики астмы уже в ранние школьные годы.Molecular allergy diagnosis allows to identify sensitization to a large range of respiratory allergens, which is important in the diagnosis of allergic asthma. Moreover, based on the reactive IgE profile detected at an early age, it is possible to predict the development of allergic respiratory diseases even at the preclinical stage. The goal of the pilot project was to create a childrens passport sensitization using a multiplex panel to be able to identify groups at risk for the development of asthma in children of early school age. Materials and methods. Parents of 33 students studying in the second grade of the Tashkent gymnasium were questioned using the ISAAC questionnaire for the clinical manifestations of respiratory diseases in their children. Their childrens sera were tested for the presence of IgE to various allergenic molecules using the MeDALL research method. Results. 30 of children were sensitized to at least one allergen, and 30 of them were born by Caesarean section. and 30 of them were born by Caesarean section. In total, 68 of the 176 allergenic molecules located on the MeDALL microchip were recognized. 80 of sensitized children had a genuine polysensitization to 3 or more major allergens. In 18 of children, IgE to household molecules of the risk of developing asthma, such as Alt a 1, Bla g 1, Bla g 2, Can f 1, Fel d 1, were detected. Conclusions. In general, clinical manifestations in the form of wheezing and obstruction were detected in 60 of sensitized children, but only 40 of these children were under the supervision of an allergist or received symptomatic treatment. In 20 of already sensitized children, clinical symptoms were absent. Molecular testing of the profile of IgE sensitization and the creation of an allergic passport allows us to identify a group of children at risk for developing asthma. This information can be used to assign therapy and secondary prevention of asthma in the early school years.


2012 ◽  
Vol 157 (2) ◽  
pp. 136-146 ◽  
Author(s):  
Jeanette Grundström ◽  
Theresa Neimert-Andersson ◽  
Cecilia Kemi ◽  
Ola B. Nilsson ◽  
Tiiu Saarne ◽  
...  

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