ABSTRACT
Background: SARS-Cov- 2 is a new respiratory virus that causes COVID-19 disease. It is a new infectious agent and knowledge is still very limited, particularly its interaction with allergic disease. The aim of this study was to assess the effect of allergic disease on the risk of hospitalization for COVID-19. Method(s): A total of 7542 SARS-CoV- 2 infections were diagnosed from 1 March to 31 December 2020 at the Centro Hospitalar Universitario de Sao Joao. A total of 1727 (22.9%) patients were hospitalized (31% in intensive care) and 5815 were followed up by an outpatient clinic. Of this group, 3479 (65%) answered a telephone questionnaire, 3 to 6 months after acute infection, about sociodemographic, clinical, behavioral and psychological characteristics. They were also asked about a previous diagnosis of allergic disease. Individuals aged < 18 years and those with asymptomatic infection were excluded. Result(s): A sample of 2702 participants was analyzed, 33.5% reported allergic disease prior to the diagnosis of COVID-19: 215 (8%) asthma, 517 (19.2%) rhinitis, 138 (5.1%) drug allergy, 36 (1.3%) food allergy, 22 (0.8%) atopic dermatitis and 2 (0.1%) hymenoptera venom allergy. The proportion of participants with asthma is not statistically different across age groups, but when grouping other allergic diseases other than asthma, a reduction was observed with age (21.5% of 18-29 years old vs. 4.9 % with >=80 years, p > 0.001). Allergic disease was significantly more prevalent in women (asthma 9.8% vs. 5.2%;other allergies: 17.9% vs. 12.7%, p < 0.001). In a univariate analysis, the risk of hospitalization of patient with COVID-19 was significantly lower in those with allergic disease (OR = 0.7;95% CI: 0.55-0.92), but for asthma the effect was not significant. Gender was an interaction factor in this association, so in a separate multivariate model for women and men and adjusted for the other significant risk factors -age, obesity and comorbidities -the effect on risk reduction remained only in the men (adjusted OR = 0.6;95% CI:0.33-1.07). Conclusion(s): In this study, allergic disease, excluding asthma, was associated with a decrease in the severity of COVID-19, especially in men. However, further studies, namely prospective studies, are needed to better characterize this effect and the underlying mechanisms.
ABSTRACT
The care of patients suffering from allergological disorders is a clinical priority of the Karlsruhe Dermatology Clinic. Previously, the diagnostic focus was on detection of type-IV-sensitisation. However, due to increasing demand, the diagnosis of hymenoptera venom allergies has become a much more prominent issue. The direct impact of recent events on the allergological activity in the Karlsruhe Dermatology Clinic, was, with regard to the clarification on a potential allergy to a Covid 19 vaccine, recently becoming even more noticeable. Copyright © 2022 Georg Thieme Verlag. All rights reserved.
ABSTRACT
The basophil activation test (BAT) is a flow cytometric assay that evaluates the percentage of activation or degranulation of peripheral blood basophils, after “in vitro” exposure to specific allergens. In sensitized patients, the stimulation of peripheral blood basophils with a specific allergen induces or up-regulates the expression of molecules, such as CD63 and CD203c, which represent, markers of degranulation and activation of basophils, respectively. The validity of the BAT requires a negative control (sterile saline) and a positive control (anti-IgE molecules). Several studies have demonstrated the role of the BAT in supporting the diagnosis of drug, food and hymenoptera venom allergy. The BAT has shown a low sensitivity but good specificity in diagnosing allergy to drugs such as NSAIDs, beta-lactam antibiotics, quinolones and muscle relaxants. In food allergy, the sensitivity and specificity of the BAT depends on the food;in the case of peanut allergy the sensitivity reaches 96% while the specificity the 100%. In addition, the BAT is an useful tool to monitor the natural resolution of allergies and the clinical effects induced by either immunotherapy or anti-IgE treatment. Finally, the BAT has been utilized to study the pathogenetic mechanisms underlying several IgE-mediated diseases. For example, in patients affected by severe bronchial asthma, the BAT has demonstrated the ability of Staphylococcus aureus enterotoxins to induce the activation of basophils supporting the role of these enterotoxins as “triggers” of the inflammatory cascade in bronchial asthma. In patients with cystic fibrosis the BAT can be used to dis-criminate allergic bronchopulmonary aspergillosis from Aspergillus colonization. More recently, the BAT has been demonstrated as a potential diagnostic tool to evaluate allergy to the polyethylene glycol (PEG) present in the anti-SARS-CoV-2 BNT162b2 mRNA vaccine.
ABSTRACT
Allergen immunotherapy (AIT) is a standard treatment for venom allergy. Our purpose was to determine if the administration of both allergen and protective vaccines during one visit is safe and if such a procedure does not deteriorate the tolerance of both vaccines. As current guidelines are based on theoretical assumptions, our aim was to establish the safety and tolerance of shortening the recommended interval between vaccinations. During two influenza seasons, 44 adult patients, with a history of systemic allergic reactions after a Hymenoptera sting, underwent 58 simultaneous allergen and seasonal influenza vaccinations (study group) while in the maintenance phase of venom immunotherapy (VIT). The control group consisted of 57 healthy adults who were vaccinated against influenza only. The conditions of the patients were monitored during hospital visits, and via telecommunication methods to evaluate the safety and tolerance of the procedure. Within the study group, there were no immediate or delayed allergic reactions after vaccinations. The presence of common, adverse influenza vaccine reactions among study group patients (29%) and control group patients (32%) did not differ significantly (p = 0.841). We did not observe a difference in the frequency of various adverse reactions in either group or a dependence of previous vaccinations against influenza on the occurrence of adverse reactions. The most frequent occurrences were local adverse reactions. All adverse reactions were resolved without treatment. These findings demonstrate the safety and tolerance of an influenza vaccination and Hymenoptera venom immunotherapy administration during one visit.
ABSTRACT
BACKGROUND: According to expert consensus, the time interval between Hymenoptera venom immunotherapy (VIT) injections can be extended up to 12 weeks, without significant impact on efficacy and safety. However, the coronavirus disease 2019 pandemic caused longer delays, and no recommendations are available to manage this huge extension. OBJECTIVES: To provide advice on how to resume VIT safely after a long delay from the last injection considering the potential risk factors for side effects, without starting again with the induction phase. METHODS: All the patients who delayed VIT because of the pandemic were consecutively enrolled in this single-center study. The time extension was decided according to their risk profile (eg, long prepandemic time interval, severe pre-VIT reaction, older age, multitreatments), and correlation analyses were performed to find potential risk factors of side effects. RESULTS: The mean delay from the pre- (7 weeks) to the postpandemic VIT interval (15.5 weeks) was 8.5 weeks. The total amount of the prepandemic VIT maintenance dose was safely administered in 1 day in 78% of patients, whereas only 3, of 87, experienced side effects, and their potential risk factors were identified in bee venom allergy and recent VIT initiation. CONCLUSIONS: In a real-world setting, long VIT delays may be safe and well tolerated, but more caution should be paid in resuming VIT in patients with long prepandemic maintenance interval, severe pre-VIT reaction, recent VIT initiation, older age, multidrug treatments, and bee venom allergy. This is useful in any case of long, unplanned, and unavoidable VIT delay.