The first editions of these useful books were well conceived and well executed. Since the editors of the second editions are the same and the group of eminent contributors very little changed, there are no radical departures in organization or extensive changes in the material presented beyond those required to bring factual knowledge up to date.
These books differ from the usual texts of bacteriology and virology in laying emphasis on host-parasite relationships rather than on the characteristics of the specific disease agents alone. For instance, in the volume on bacterial and mycotic infections about one fourth of the book is devoted to morphology and physiology of bacteria, properties of the bacteria which enable them to cause disease, response of the host to the parasite, immunochemistry, the allergic state in the host, etc. Then follows a discussion of the various types of micro-organisms with their particular effects on the human