Cockroach allergens in homes associated with prevalence of childhood asthma in some neighborhoods
In New York City, the prevalence of asthma among children entering school varies by neighborhood anywhere from 3% to 19%, and children growing up within walking distance of each other can have 2-3 fold differences in risk for having asthma. In the first comprehensive effort to understand what drives these localized differences, researchers at Columbia University's Mailman School of Public Health compared the household presence of cockroach, mouse, cat, dust mite and other allergens in neighborhoods with a high prevalence of asthma to that in low-prevalence neighborhoods. They found that cockroach, mouse and cat allergens were significantly higher in homes located in neighborhoods where asthma is more common and that children in these higher-exposure homes were more likely to be sensitized to cockroach antigens.