In his introduction, Dr. Burnand defines his subject as follows: "The atypical tuberculoses are all the incomplete or irregular pathological manifestations which, according to certain indications, principally clinical, seem to indicate an infection by the tuberculous virus but which fail to fulfill the usual criteria either anatomical or bacteriological for the diagnosis of tuberculosis." He points out that the modern desire to simplify and standardize the classification of tuberculosis has a tendency to exclude from this diagnosis all diseases or syndromes in which tubercle bacilli cannot be demonstrated in the secretions or excretions of the body. This in turn leads to ignorance of the greater portion of tuberculosis which is clinically submerged or latent.
The French schools of phthisiology and bacteriology have been for many years explorers of the difficult and shadowy fields to which this book is a guide. Here are brought together the results of studies and clinical