According to Chiesa, Westphal and Akerman (2008, P. 55): Currently, in national terms, the respiratory problems constitute the second cause of the deaths of the regions South and Southeastern and the third cause in the too much regions. In So Paulo, mortality for the respiratory infections, also is significant occupying the third place. Tarantino (1997) says in them, the respect, that had time where the pneumonia concept meant, almost always, an acute inflammatory process of the lung, provoked for pneumococo. After the clinical conceptualization of the pathology, suffered to a simplification, passing the term to translate the inflammation acute, of any nature, located in parnquima pulmonary. The pneumonia is that one that better if defines as bacterial processes, fngicos, virticos or of another nature.
How much to the patologias that acometem the men, none makes use of as many criteria for its classification as the pneumonias. The difficulties for classification of the pneumonias become more difficult of what to treat them; the applied criteria are as much how many numerous. If it adopted the age criterion, we would have pneumonias with preference for children and others for aged; habits of life of the smokers and great alcoholics; how much to the habitation: urban and agricultural; in relation to the patogenia: inalatria, aspiratory hematognica or; e, finally, the ideal classification, the one that would be based on the etiolgico criterion, type of .causing patgeno (TARANTINO, 1997). The pneumonias, for being illnesses caused for some types of patgenos, become its inexact diagnosis, generally it leads to a therapeutical empiricist and most of the time the .causing agent is not identified. This lack of certainty in the true diagnosis results in a quandary in the decision of treatment (NIEDERMAN et al., 2006).