Dental erosion, an extraesophageal manifestation of gastroesophageal reflux disease. The experience of a center for digestive physiology in Southeastern Mexico.

BACKGROUND: Dental erosion (DE) is the loss of the hard tissues of the tooth produced by the action of gastric juice, pepsin and acid on the dental enamel, its frequency ranges from 5 to 53.41 %. In Mexico there are no reports on the frequency and possible association. OBJECTIVE: To establish the prevalence of dental erosion and its relationship to GERD. PATIENTS AND METHODS: Prospective, observational, descriptive and comparative study was conducted in 60 patients diagnosed with GERD and 60 healthy patients at the Institute of Medical and Biological Research of the Universidad Veracruzana in Veracruz city. Anthropometric characteristics, dietary habits, oral hygiene, alcohol consumption, smoking, ED index and Index of decayed/missing dental pieces/sealed and correlation between severity of ED and GERD were analyzed. RESULTS: 78.67 % of patients with GERD had ED, 23.33 % corresponded to grade 0, 41.67 % to N1, N2 and 23.33 % to 11.67 % to N3. Predominance of females (2,3:1). The mean age was 50.92 +/- 13.52 years. The severity of dental erosion was significantly related to the severity of reflux, halitosis, CPO index and poor eating habits. There was no statistically significant difference in the other variables analyzed. CONCLUSIONS: Dental erosion has a high frequency in patients with GERD and reflux characteristics are directly related to their severity and therefore should be considered as a manifestation of GERD extraesophageal.

Compromising between European and US allergen immunotherapy schools: Discussions from GUIMIT, the Mexican immunotherapy guidelines.

BACKGROUND: Allergen immunotherapy (AIT) has a longstanding history and still remains the only disease-changing treatment for allergic rhinitis and asthma. Over the years 2 different schools have developed their strategies: the United States (US) and the European. Allergen extracts available in these regions are adapted to local practice. In other parts of the world, extracts from both regions and local ones are commercialized, as in Mexico. Here, local experts developed a national AIT guideline (GUIMIT 2019) searching for compromises between both schools. METHODS: Using ADAPTE methodology for transculturizing guidelines and AGREE-II for evaluating guideline quality, GUIMIT selected 3 high-quality Main Reference Guidelines (MRGs): the European Academy of Allergy, Asthma and Immunology (EAACI) guideines, the S2k guideline of various German-speaking medical societies (2014), and the US Practice Parameters on Allergen Immunotherapy 2011. We formulated clinical questions and based responses on the fused evidence available in the MRGs, combined with local possibilities, patient's preference, and costs. We came across several issues on which the MRGs disagreed. These are presented here along with arguments of GUIMIT members to resolve them. GUIMIT (for a complete English version, Supplementary data) concluded the following. RESULTS: Related to the diagnosis of IgE-mediated respiratory allergy, apart from skin prick testing complementary tests (challenges, in vitro testing and molecular such as species-specific allergens) might be useful in selected cases to inform AIT composition. AIT is indicated in allergic rhinitis and suggested in allergic asthma (once controlled) and IgE-mediated atopic dermatitis. Concerning the correct subcutaneous AIT dose for compounding vials according to the US school: dosing tables and formula are given; up to 4 non-related allergens can be mixed, refraining from mixing high with low protease extracts. When using European extracts: the manufacturer's indications should be followed; in multi-allergic patients 2 simultaneous injections can be given (100% consensus); mixing is discouraged. In Mexico only allergoid tablets are available; based on doses used in all sublingual immunotherapy (SLIT) publications referenced in MRGs, GUIMIT suggests a probable effective dose related to subcutaneous immunotherapy (SCIT) might be: 50-200% of the monthly SCIT dose given daily, maximum mixing 4 allergens. Also, a table with practical suggestions on non-evidence-existing issues, developed with a simplified Delphi method, is added. Finally, dissemination and implementation of guidelines is briefly discussed, explaining how we used online tools for this in Mexico. CONCLUSIONS: Countries where European and American AIT extracts are available should adjust AIT according to which school is followed.

[GUIMIT 2019, Mexican Guideline on Immunotherapy. Guideline on the diagnosis of IgE-mediated allergic disease and immunotherapy following the ADAPTE approach]. / GUIMIT 2019, Guía Mexicana de Inmunoterapia. Guía de diagnóstico de alergia mediada por IgE e inmunoterapia aplicando el método ADAPTE.

BACKGROUND: In Mexico, allergen immunotherapy (AIT) and immunotherapy with hymenoptera venom (VIT) is traditionally practiced combining aspects of the European and American school. In addition, both types of extracts (European and American) are commercially available in Mexico. Moreover, for an adequate AIT/VIT a timely diagnosis is crucial. Therefore, there is a need for a widely accepted, up-to-date national immunotherapy guideline that covers diagnostic issues, indications, dosage, mechanisms, adverse effects and future expectations of AIT (GUIMIT 2019). METHOD: With nationwide groups of allergists participating, including delegates from postgraduate training-programs in Allergy/Immunology-forming, the guideline document was developed according to the ADAPTE methodology: the immunotherapy guidelines from European Academy of Allergy and Clinical Immunology, German Society for Allergology and Clinical Immunology, The American Academy of Allergy, Asthma and Immunology and American College of Allergy, Asthma, and Immunology were selected as mother guidelines, as they received the highest AGREE-II score among international guidelines available; their evidence conforms the scientific basis for this document. RESULTS: GUIMIT emanates strong or weak (suggestions) recommendations about practical issues directly related to in vivo or in vitro diagnosis of IgE mediated allergic diseases and the preparation and application of AIT/VIT and its adverse effects. GUIMIT finishes with a perspective on AIT modalities for the future. All the statements were discussed and voted on until > 80 % consensus was reached. CONCLUSIONS: A wide and diverse group of AIT/VIT experts issued transculturized, evidence-based recommendations and reached consensus that might improve and standardize AIT practice in Mexico.

Antecedentes: En México, la inmunoterapia con alérgenos (ITA) y con veneno de himenópteros (VIT) se practica tradicionalmente combinando criterios de las escuelas europea y estadounidense; los dos tipos de extractos están comercialmente disponibles en México. Para una ITA adecuada es crucial un diagnóstico oportuno. Objetivo: Presentar GUIMIT 2019, Guía Mexicana de Inmunoterapia 2019, de base amplia, actualizada, que abarca temas de diagnóstico, indicaciones, dosificación, mecanismos, efectos adversos de la ITA y expectativas con esta modalidad de tratamiento. Método: Con la participación de múltiples grupos mexicanos de alergólogos, que incluían los centros formadores universitarios en alergia e inmunología, se desarrolló el documento de la guía según la metodología ADAPTE. Las guías de inmunoterapia de la European Academy of Allergy and Clinical Immunology, The American Academy of Allergy, Asthma and Immunology, German Society for Allergology and Clinical Immunology y del American College of Allergy, Asthma, and Immunology se seleccionaron como guías fuente, ya que recibieron la puntuación AGREE-II más alta entre las guías internacionales disponibles; su evidencia conforma la base científica de GUIMIT 2019. Resultados: En GUIMIT 2019 se emiten recomendaciones fuertes o débiles (sugerencias) acerca de temas directamente relacionados con el diagnóstico in vivo o in vitro de las enfermedades alérgicas mediadas por IgE, la preparación y aplicación de ITA o VIT y sus efectos adversos; se incluye la revisión de las modalidades de ITA para el futuro. Todos los argumentos que se exponen fueron discutidos y votados con > 80 % de aprobación. Conclusión: Un grupo amplio y diverso de expertos en ITA y VIT emitió recomendaciones transculturizadas basadas en evidencia, que alcanzaron consenso; con ellas se pretende mejorar y homologar la práctica de la inmunoterapia en México.

[Clinical-epidemiological profile of oral allergy syndrome in the population aged 6 to 18 years]. / Perfil clínico-epidemiológico del síndrome de alergia oral en población de 6 a 18 años.

BACKGROUND: Oral allergy syndrome (OAS) or pollen-fruit syndrome is a type of food allergy. Its characteristics and associated allergens vary according to the studied population. There are few studies in Mexico about this topic, none in children. OBJECTIVE: To describe clinical and epidemiological characteristics of OAS among children in Mexico. METHODS: A descriptive, observational, transversal and prospective study was conducted. We included every patient from 6 to 18 years old with diagnostic suspicion of OAS, in which complete clinical history, skin test to food and pollens, and oral food challenge were performed. RESULTS: We found a prevalence of 5.3% (29 patients): 55% were males. Average age was 10 ± 3 years, and average number of food implicated were 6.8 ± 4.1. Apple, peach and banana, were the most frequent food associated, and sensitization to oak and European privet, the more prevalent pollens found in OAS. CONCLUSION: OAS is a common type of food allergy, transient and mild in nature. In more than 90% of the cases is associated with allergic rhinitis and sensitization to pollens. In our population, profilins may be involved in its pathogenesis. However, more studies are required to prove this.

Antecedentes: El síndrome de alergia oral o de polen-frutas es una forma de alergia alimentaria. Sus características y los alérgenos implicados varían según la población estudiada. En México existen pocos estudios al respecto y ninguno en niños. Objetivo: Describir las características clínicas y epidemiológicas del síndrome de alergia oral en población pediátrica de México. Métodos: Estudio prospectivo, descriptivo, observacional y transversal en el que se incluyeron pacientes de 6 a 8 años de edad con sospecha diagnóstica de síndrome de alergia alimentaria. Se realizó historia clínica completa, pruebas cutáneas con aplicación de pólenes y alimentos, así como prueba de reto oral. Resultados: La prevalencia fue de 5.3 % (29 pacientes); 55 % del sexo masculino; el promedio de edad fue de 10 ± 3 años y el número de alimentos implicados de 6.8 ± 4.1. Manzana, durazno y plátano fueron los alimentos más asociados y las sensibilizaciones a encino y aliso, las más frecuentes. Conclusión: El síndrome de alergia oral es común en la población con alergia alimentaria, es transitorio y de intensidad leve. En más de 90 % de los casos está asociado con rinitis alérgica y sensibilización a pólenes. En su etiopatogenia es probable que estén involucradas profilinas, pero se requieren más estudios para determinarlo.

Validation and diagnostic usefulness of gastroesophageal reflux disease questionnaire in a primary care level in Mexico.

BACKGROUND/AIMS: Different non-invasive diagnostics strategies have been used to assess patients with gastroesophageal reflux. Gastroesophageal reflux disease (GERD) questionnaire (GerdQ) is a 6-item, easy to use questionnaire that was developed primarily as a diagnostic tool for GERD in primary care. Our aim was to validate and assess diagnostic utility of GerdQ questionnaire in Mexican patients in the primary care setting. METHODS: The study was performed in 3 phases: (1) a questionnaire translation and comprehension study (n = 20), (2) are a reproduci-bility and validation study (50 patients and 50 controls) and (3) a study to assess the clinical utility in 252 subjects with GERD symptoms. Diagnostic accuracy was calculated using endoscopy and/or pH-metry as the gold standard. RESULTS: Internal consistency measured by the Cronbach's α coefficient was 0.81 for patients and 0.90 for healthy controls, with a mixed coefficient of 0.93. Reproducibility for GerdQ was very good and its discriminating validity was 88%. Most of the pa-tients with erosive reflux and non-erosive reflux with abnormal pH-metry had scores > 8, meanwhile most of the patients with functional heartburn and hypersensitive esophagus had < 8. Sensitivity, specificity and positive predictive value of GerdQ com-pared to the gold standard were 72%, 72% and 87%, respectively. CONCLUSIONS: In Mexico, the GerdQ questionnaire Spanish validated version is useful for GERD diagnosis in the primary care setting.(J Neurogastroenterol Motil 2014;20:475-482).

Laringitis por reflujo: mito o realidad? / Reflux laryngitis: mith or reality?

La enfermedad por reflujo gastroesofágico (ERGE) es un trastorno gastrointestinal frecuente que representa una de las causas de consulta más común en medicina general y gastroenterología. Recientemente, se ha descrito que la ERGE puede asociarse a manifestaciones otorrinolaringológicas como laringitis, tos crónica, odinofagia, escurrimiento nasal posterior y asma. En su fisiopatología se involucran mecanismos directos e indirectos, considerándose al ácido como el agente más nocivo, aunque otras sustancias pueden lesionar las estructuras laríngeas como pepsina, moco y contenidos duodenales. El diagnóstico de ERGE laríngeo se basa en la realización cuestionarios específicos, laringoscopia y la pHmetría ambulatoria de 2 canales. Independientemente del método diagnóstico empleado, cuando se asume que la ERGE es causa de síntomas laríngeos, en la actualidad el uso de medicamentos que suprimen el acido (especialmente IBPs) constituye la piedra angular del tratamiento, aunque los resultados clínicos sobre su efectividad son muy controversiales. En la presente revisión se analizan los aspectos más controversiales respecto a la fisiopatología, diagnóstico y tratamiento de las manifestaciones laríngeas de la ERGE...

Gastro-esophageal reflux disease (GERD) is a frequent gastrointestinal disorder that has became one of the most common conditions presenting in general and gastroenterology practice. Recently, it has been described that GERD may have otolaryngological manifestations such as laryngitis, chronic cough, odynophagia, posterior nasal drip and asthma. Several patophysiological mechanisms have been described, but abnormal acid exposure is the most important. However, there is evidence that other substances can damage laryngeal structures, such as pepsin, mucus and duodenal content). Laryngeal GERD is diagnosed by using specific questionnaires, or by the presence of laryngeal signs in the laryngoscopy or by the detection of abnormal acid exposure using a dual ambulatory pH monitoring. Suppressive acid secretion drugs (specifi cally PPI´s) represent the gold standard therapy when laryngeal symptoms are related to GERD. However, the evidence regarding the effectiveness of PPI´s in laryngeal GERD are controversial. In this review, we analyze the most relevant issues regarding the pathophysiology, diagnosis and treatment of laryngeal GERD...