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GLOSSARY. 
Bacteriology. The study of bacteria. 
Bacteriolysins. Substances developed in the body which are 
capable of dissolving bacteria. 
Bacterium (pi. bacteria). A unicellular organism belonging to 
the vegetable kingdom. 
Binary fission. The method of multiplication of bacteria in 
which the organism splits in half. 
Carbohydrates. A compound composed of carbon, hydrogen, 
and oxygen. 
Carrier. A person, not sick with any disease, who carries dis¬ 
ease-producing organisms in the body and is capable of 
infecting others with them. 
Cell. The smallest unit of structure in plant and animal life. 
Cellulitis. An inflammation in the soft tissues of the body 
Chancre. The primary sore at the point of infection in 
syphilis. 
Coccus. A bacterium having a spherical shape. 
Colony. A mass of micro-organisms of the same kind that 
has developed from one organism. 
Contagion. The transmission of disease by mediate or im¬ 
mediate contact. 
Culture. A mass of micro-organisms growing on laboratory 
culture media. 
Cystitis. Inflammation of the urinary bladder. 
Deodorant. A substance that destroys objectionable odors. 
Disinfectant. A physical or chemical agent that destroys 
bacteria. 
Empyema. A collection of pus in the pleural cavity. 
Endocarditis. An inflammation of the lining of the heart. 
Endotoxin. A poison retained in the body of a bacterium and 
set free when the bacterium disintegrates. 
Enzyme. An unorganized ferment formed in the bodies of 
plants and animals capable of splitting complex substances 
into simpler forms without being changed itself. 
Erysipelas. An acute spreading infection in the skin. 
Etiology. The study of the causes of disease and the way 
disease is transmitted. 
