[Prevalence of asthma and determination of symptoms as risk indicators].

Background: Asthma is a chronic inflammatory airway disease whose prevalence has increased, especially in developed countries; the results of studies of asthma prevalence vary in different populations and even within the same country; in Mexico we observed fluctuations in prevalence of asthma from 7% to 33%.

Objective: To determine the prevalence of asthma and severity of symptoms as risk indicators in school population in cities in various states of Mexico.

Material And Method: A descriptive study of detection of asthma prevalence and analytical-comparative observational study of determination of symptoms of asthma.

[Prevalence of rhinitis allergic in populations of several states of Mexico].

Background: Allergic rhinitis is an inflammatory disorder of the nasal mucosa, characterized by symptoms of itching, rhinorrhea, nasal congestion and sneezing induced by an IgE-mediated response. In Mexico we have reports of prevalence, with fluctuations of 5.5% to 47.