Bronchial asthma is a common disease that we know a lot, but since the pulmonology still fairly unknown. To begin, note that no asthma, but asthma, seems obvious but convenient.
My patients always say, "all asthmatics are equal and all are different". The origin of bronchial asthma is different in each case, still it has a genetic basis, but not absolute. An example of this is that among identical twins there are only 15% agreement.
In general, there is a global trend to increase bronchial asthma, but there is currently no conclusive Spanish epidemiologists studies.
Causes of bronchial asthma
Among the causes that have been advanced to explain the increase in asthma, there hygienist theory, very schematically suggest that protection to infection in early life "moves" immunity to allergies and asthma. In addition, it has also been linked to increased childhood obesity, since there is an unknown link between asthma and obesity.
In Spain it is accepted that 5% of children are asthmatic. Depending on each country this index is changing, taking the country as a Lapland which is very rare or countries where it is very common as New Zealand. However, it has been said that fifty years half of the population has had at least one episode of asthma.
In children, some diseases such as bronchiolitis syncytial virus (RSV) is a trigger. Allergy or mediated immunity Immunoglobulin E has a great role, they are a source of such pets or dust mites. In children that asthma is accompanied by food allergy is of greater difficulty. Each geographical area has its own triggers, like cockroaches in parts of the United States.