Self-reported hypersensitivity and allergy to foods amongst Mexican adolescents: Prevalence and associated factors.

BACKGROUND: The prevalence of food allergy is on the rise on a global scale. OBJECTIVE: To determine the prevalence of food hypersensitivity (FHS) and probable food allergy (PFA), as well as the foods and factors associated with these occurrences. METHODS: A cross-sectional study was carried out among 1992 adolescents (aged 15-18 years). Each adolescent answered a structured questionnaire. A multivariate analysis was used to identify the association between the variables. RESULTS: The prevalence of FHS was 10.6% (the most commonly associated foods were shrimp, cow's milk and avocado) and the PFA was 7.8% (shrimp, cow's milk and pecan). The prevalences of oral allergy syndrome, food-associated urticaria and systemic reaction were 4.9%, 3.6% and 1.5%, respectively. The following factors were associated with FHS: personal history of asthma (OR 1.63; 95% CI: 1.11-2.41), allergic rhinitis (OR 2.60; 95% CI: 1.75-3.87), atopic dermatitis (OR 2.07; 95% CI: 1.25-3.43), maternal history of asthma (OR 1.80; 95% CI: 1.02-3.16), atopic dermatitis (OR 6.11; 95% CI: 2.45-15.29), and female sex (OR 1.89; 95% CI: 1.38-2.59). PFA was associated with a personal history of asthma (OR 1.65; 95% CI: 1.06-2.56), allergic rhinitis (OR 2.46; 95% CI: 1.56-3.88), atopic dermatitis (OR 2.02; 95% CI: 1.15-3.54), paternal allergic rhinitis (OR 2.52; 95% CI: 1.15-5.51), maternal atopic dermatitis (OR 7.46; 95% CI: 2.93-19.00), and female sex (OR 1.89; 95% CI: 1.31-2.72). CONCLUSION: The adverse reactions associated with foods among late adolescents are a frequent occurrence, and the most commonly associated factor is atopy.

[Frequent allergies in Mexico Valley in children]. / Alergenos frecuentes del Valle de México en niños.

The incidence of skin test positively for 48 allergens have been evaluated in children with bronchial asthma. We studied the 347 cards of clinical file the allergic children a course 32 months. The most frequent allergens is Dermatophagoides pteronyssinus, cat and the other 24 allergens were less 10%. This allergen appears to present in Mexico Valley, the incidence to this allergen might be considered must frequent in allergic children who do reducing skin test for diagnostic allergic diseases.

[Aeroallergens, skin tests and allergic diseases in 1091 patients]. / Aeroalergenos, pruebas cutáneas y enfermedad alérgica en 1091 pacientes.

To know the frequency of positively of several skin tests, data cards from patients, of the Allergy and Clinic Immunology Service of the Hospital de Especialidades del Centro Medico Nacional Siglo XXI (Mexico City), between January, 1989 and March, 1995, were reviewed. Aqueous extracts manufactures by our laboratory were applied, in a dilution of 1:1000 weight-volume. 1091 from 5,651 skin tests patients were positive. Asthma and rhinitis were diagnosed in 492, allergic rhinitis in 289, allergic asthma in 111, and other diagnosis in 199 cases. The most frequent inhalable aeroallergens were house dust and perennial Dermatophagoides p and f1 with predominance in the rainy season, followed by pollens from Fraxinus a. Quercus a and Capriola, with predominance in the rainy season. The most frequent fungi were Candida and Fusarium, with predominance in the dry season.

[Premenstrual asthma: relation to hormones]. / Asma premenstrual: relación con hormonas.

Exacerbation of asthmatic symptoms just before or at the time of menstruation documented in some women with asthma has been called "premenstrual asthma" (PMA). The effect of sex hormones on airway function has not been well studied in spite of much evidence to suggest, therefore about relationships between the sex hormones and airway. The investigations of (PMA) have been based on studies of asthmatics already aware of a deterioration of asthma premenstrually. Little is known, therefore, about relationships between the menstrual cycle with asthma and (PMA) subjects. Although the mechanism of PMA remains unclear.

[Combined treatment in recurrent laryngeal papillomatosis with CO2 laser microlaryngoscopic resection and interferon alpha 2b]. / Tratamiento combinado en papilomatosis laríngea recidivante con resección microlaringoscópica láser CO2 e lfn alpha 2b.

Laryngeal papillomatosis of viral origin and bad prognosis is characterized by multiple recurrence that induced obstruction of air pathways. Surgical remove with laser CO2 is the elected treatment and the its combination with interferon (INF) has improved the prognosis of this recurrent viral disease. Here is a presents a preliminary study based upon such therapeutic scheme. Twelve patients diagnosed with laryngeal papillomatosis; 6 women and 6 men from 32 to 72 years of age were included into two therapeutic schemes: Group B, Combined: One woman and 5 men to whom the surgical procedure was followed by a initial local dose of 3 x 10(6) IU of INF alpha 2b (Intron A) and subsequently 10 X 10(6) (of the same INF were administered intramuscular every days during 15 months the statistical analysis (Fisher test) between patients of the both groups of treatment showed a significant (p < 0.0001) clinical improvement of the patients who received the combined treatment (B). In this group of patients was found incidence of the collateral effects such as: headache, fever arthralgias, depression and anorexia.