Notes on 

 Modern Biological Therapy 



INTRODUCTION 



These notes on Biological Therapy are not intended to 

 replace standard text books but are presented in the hope 

 that they will afford the busy practitioner a ready, concise, 

 yet authentic summary of the present status of the diseases 

 discussed, as well as of the production and proper use of 

 biological products available for their prevention and treat- 

 ment. In accordance with this idea many points have been 

 omitted from consideration since their presentation would 

 require a voluminous edition and would be merely a repeti- 

 tion of the data already available in text books on pathology, 

 bacteriology and medicine. 



Under treatment and prevention there is discussed only 

 the factors which pertain to biological therapy but this 

 should not be construed to mean that other proven methods 

 of treatment should not also be used. Producers of biologies 

 do not, and users should not, consider biological products as 

 **cure alls," capable of curing and preventing all diseases and 

 conditions without taking into consideration other cardinal 

 essentials such as sanitation, disinfection, proper housing, 

 feeding and correct medical or surgical treatment. Rather, 

 biologies are intended to supplement other proven and valu- 

 able methods of disease control and to be used in diseases 

 that prove refractory under other forms of treatment. 



The successful use of biologies is dependent upon a 

 working knowledge of the inseparably associated science of 

 immunology, since the object which is desired when biologies 

 are used, is the development of immunity or the diagnosis 

 of infection. This knowledge develops an appreciation not 

 only of the uses but also of the limitations and contra- 

 indications of biologies. For that reason, the following 

 short discussion of immunology is offered. 



SUSCEPTIBILITY 



This condition is the reverse of immunity and has been 

 defined as meaning ^'easily affected." Most individuals have 

 permanent susceptibility to certain diseases while they are 



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