The bactericidal action

The bactericidal action property to cause the death of different microorganisms, many inherent physical and chemical agents. Powerful bactericidal action have different types of radiation (solar, ultraviolet rays, radioactive radiation), as well as halogen-free, oxidising substances, phenols and their derivatives, heavy metals, alkali.

Bactericidal (bacteria and lat. caedo - kill) - property of physical or chemical agents to cause the death of the bacteria. The concept of bactericides also includes more specific notion of fungicides, virusocidal and others Among the various physical factors, possessing bactericidal action, for medical practice, the most important are radiant heat and energy. Most of the microbes is characterized by high sensitivity to short-wave radiation. Sources of ultraviolet waves in the form of so-called bactericidal lamps used in disinfecting the premises. Bactericidal chemicals are divided into disinfectants, antiseptic and chemotherapy, depending on the toxicity of the microorganism and possible applications for the treatment of infectious diseases. The speed of the withering away of the microbial population under the influence of any antibacterial agents depends on its size and concentration of the drug. The exception to this rule are only penicillins, speed bactericidal action which by increasing the concentration increases slightly. The most part of cells bacterial population dies under the influence of bactericidal substances evenly. But some of microbes in large populations possesses ability is long to survive, to persist, even in the presence of high concentrations of the antimicrobial substances. This phenomenon takes place under the action of antibacterial chemotherapy drugs in the organism and is the basis resistant cases of baillonella.