GLOSSARY 



Antagonism. The phenomenon of a living organism inhibiting the 

 growth or interfering with the activities of another living organism 

 as a result of the creation of unfavorable conditions in the medium 

 or the production of a specific antimicrobial substance. 



Antagonist. An organism having the capacity to inhibit the growth or 

 interfere with the activity of another organism. 



Antagonistic substance. A term frequently used to designate a substance 

 that neutralizes the bacteriostatic action of an antibiotic substance. 



Antibacterial index. The ratio of concentration of an inhibitor sufficient 

 to inhibit the growth of an organism to the concentration of a metabo- 

 lite. 



Antibiosis. The inhibition of growth of one organism by another. 



Antibiotic or antibiotic substance. A chemical substance produced by 

 microorganisms which has the capacity to inhibit the growth of bac- 

 teria and other microorganisms and even to destroy them, 



Antidotic or antidotic substance. A chemical substance produced by 

 microorganisms which has the capacity to inactivate the injurious 

 effect of bacterial toxins. 



Anti-inhibitor y inhibitor ^ suf pressor are terms of similar significance to 

 antagonistic substance. 



Bactericidal. Causing the death of bacteria. 



Bacterioantagonistic. Inhibiting the growth of bacteria. 



Bacteriolytic. Causing not only the death of bacteria but also their lysis 

 or disintegration. 



Bacteriostatic. Inhibiting the growth of bacteria. 



Bacteriostatic or antibiotic spectrum. A range of inhibition of growth of 

 different bacteria by different concentrations of an antibiotic sub- 

 stance. It may be expressed graphically, the bands of the spectrum 

 representing the concentrations of the substance. 



Bacteriotherafy. The use of living bacteria for the treatment of infec- 

 tious diseases. 



Biostatic complex. The sum total of factors that limit microbial develop- 

 ment in a medium. The absence of such factors may result in the for- 

 mation of toxic products. 



