Bactericidal Substances definition of Bactericidal Substances in the Free Online Encyclopedia.

Bactericidal Substances

substances capable of killing bacteria and other microorganisms. In the latter case, bactericides are distinguished as fungicides, which act on fungi; amoebicides, which kill amoebas; and so on. Bactericidal substances include compounds of varying chemical nature: phenol, mercury chloride, alcohol, formalin, hydrogen peroxide, antibiotics, and such gases as sulfur dioxide, ethylene oxide, and methyl bromide. The immune antibodies produced in the blood of animals and man are also bactericidal. Bactericidal substances quickly kill the vegetative cells of bacteria; bacterial spores are more difficult to destroy. The mechanism of action of bactericidal substances varies— some denature microbial protein, others attack certain enzyme systems, and so on. Since not all the microorganisms of a population are equally sensitive to these substances, the use of submaximal concentrations enables some of the microbes to survive (partial bactericidal capacity) and give rise to races resistant to bactericidal substances. Therefore the bactericidal substances must be administered in rather large doses when used in the treatment of disease. Their activity decreases in the presence of proteins (pus, serum, milk, and others). Bactericidal substances are used for purposes of sterilization—that is, as disinfectants or antiseptics—and for chemotherapy.

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No references found			Many of these compounds are part of a class of proteinaceous bactericidal substances called lantibiotics or bacteriocins. Inhibition of Propionibacterium acnes by bacteriocin-like inhibitory ... by Bowe, Whitney P.; Filip, Jennifer C.; DiRienzo, Joseph M.; Volgina, Alla; Margolis, David J. / Journal of Drugs in Dermatology			Bacterial genetics Bacterial growth bacterial infection bacterial leaf spot Bacterial Lixiviation bacterial luminescence bacterial metabolism bacterial motility bacterial photosynthesis Bacterial physiology and metabolism bacterial pigmentation bacterial pneumonia bacterial pustule bacterial soft rot bacterial speck Bacterial Spore bacterial spot Bacterial taxonomy Bacterial Titer bacterial transformation bacterial vaccine bacterial vaginosis bacterial wilt disease Bactericidal Capacity Bactericidal Lamp Bactericidal Substances bactericide bactericidin bacterin bacteriochlorophyll Bacteriochlorophylls bacteriocin bacteriocinogen bacteriocyte bacteriogenic Bacteriological Ammunition Bacteriological Reconnaissance bacteriological warfare Bacteriological Weapon bacteriologist Bacteriology bacteriolysin bacteriolysis Bacterionema bacteriophage Bacteriophages bacteriophobia Bacteriopurpurin bacteriorhodopsin bacterioruberin bacteriosis			bacterial vaccine bacterial vaccine Bacterial vaginitis bacterial vaginosis bacterial vaginosis bacterial vaginosis bacterial vaginosis bacterial virus bacterial virus bacterial virus bacterial virus Bacterial White Spot Syndrome bacterial wilt disease bacterially bacterially Bacterially Fermented Mistletoe Preparation Bacterially Synthesized Human Growth Hormone Bacterias Bacterias Bacterias bactericidal bactericidal bactericidal bactericidal antibiotic bactericidal antibiotic bactericidal antibiotic bactericidal antibiotic Bactericidal Capacity Bactericidal Lamp Bactericidal Permeability-Increasing Protein Bactericidal Substances bactericidal/bacteriostatic drug bactericidal/bacteriostatic drug bactericidal/bacteriostatic drug bactericidal/bacteriostatic drug bactericidally bactericidally bactericidally bactericide bactericide bactericide bactericides bactericides bactericides bactericidin bactericidin bacterid bacteriemia bacteriemia bacteriemia Bactéries Hétérotrophes Aérobies et Anaérobies Facultatives Bacteries Multiresistantes bacterin bacterin bacterin bacterio- bacterio- bacteriochlorophyll bacteriochlorophyll bacteriochlorophyll Bacteriochlorophyll a