The quality and scientific preciseness of the authors coming from several countries, does much to give strength to the whole book, especially as it reflects local and regional realities that characterize the diversity of expression allergic. In fact, the etiology and clinical response of allergic patient is very different, depending on the location, habits, socio-economic conditions and even the specific interests of key lines of investigation developed that the authors have incorporated into the chapters, but always guided by higher values of accuracy
