GLOSSARY. 
143 
Spirochete. A spiral or corkscrew-shaped organism. 
Spores. A form assumed by some bacteria to resist unfavor¬ 
able influences. 
Sterile. Free from micro-organisms. 
Suppuration. The formation of pus. 
Tenesmus. Ineffectual straining at stool. 
Tuberculin. A preparation made from tubercle bacilli and 
containing their toxins. 
Vaccine. See bacteria. 
Vesicle. A small elevation of the skin containing serum. 
Vacuole. A cavity in the protoplasm of a cell. 
Virus. An animal poison capable of producing disease. 
Virulence. Malignity; especially of a microbe. 
Wassermann reaction. A blood-test for the detection of 
syphilis. 
Widal reaction. A blood-test for the detection of typhoid 
fever. 
