352 GLOSSARY 



serum for given bacteria, as compared with those in a 

 normal or control serum. 



Opsonins. — Specific substances in the blood-serum possessed 

 of the ability to sensitize or prepare bacteria for phago- 

 cytosis. 



Organotherapy. — Therapeutic administration of products 

 of ductless glands and other organs. 



Passive Immunization. — The process by which immunity is 

 acquired when artificial antisera are injected into the 

 animal body. 



Phagocytosis. — Property of the leucocytes whereby they take 

 up into their substance foreign particles, such as bac- 

 teria, pigment, carbon granules, etc., thus removing 

 them from the circulation. 



Precipitins. — Antibodies of the second order of Ehrlich, 

 formed in the blood in response to unorganized protein 

 material. 



Sero-hacterin. — Bacterins prepared by treating bacteria 

 with their specific immune serum, thus " sensitizing " 

 them so that they are acted upon by the complement in 

 the patient's blood immediately after injection. 



Stock Bacterin. — A therapeutic suspension of bacteria which 

 have been isolated from another patient, who has suf- 

 fered from a similar infection. 



Toxins. — The soluble products of bacterial and plant growth, 

 whereby their deleterious effects are brought about. 



Tuberculins. — Various preparations from tubercle bacilli for 

 therapeutic and diagnostic purposes. 



Vaccination. — Protective immunization to smallpox by in- 

 oculation with cow-pox virus. 



Vaccine. — Term properly reserved for cow-pox virus ; now 

 frequently applied to therapeutic suspensions of bacteria 

 or bacterins. 



