GLOSSARY 



Active Immunization. — The process by which the body cells 

 of an animal are stimulated by a toxin or foreign body 

 (antigen) to the production of antibodies specific 

 against the given foreign substance. 



Agglutination. — A phenomenon characterized by clumping 

 and loss of motility of bacteria, brought about by ag- 

 glutinins. 



Agglutinins, — Antibodies of the second order of Ehrlich, 

 producing agglutination. 



Allergy. — The altered condition of an animal into whose 

 tissues has been introduced an antigen or foreign cell 

 product. 



Amboceptor. — Specific antibody of the third order of Ehr- 

 lich, which acts only in conjunction with non-specific 

 substance or complement. 



Anaphylaxis. — A series of apparently deleterious effects pro- 

 duced by a second injection of specific protein material 

 into an animal that has been previously " sensitized " 

 by a prior injection of the same material. 



Antigen. — ^A foreign substance, usually of protein nature, 

 capable of exciting the formation of specific antibodies. 



Antiserum. — Serum containing specific substances whereby 

 the action of bacteria or their toxins is antagonized. 



Antitoxin. — Specific substance produced in the blood-serum 

 whereby the action of bacterial toxins is antagonized. 



Autogenous Bacterin. — Therapeutic suspension of bacteria 

 prepared from the particular strain cultured from the 

 infected patient. 



Autolysis. — Disintegration of bacteria by treating them with 

 salt solution, alcohol, ether, chloroform, etc., theoret- 

 ically to remove toxic or antiopsonic substances. 

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