Sterilization is defined as the destruction of microbial life, while disinfection involves the elimination of recognized pathogenic microorganisms. There are few specific measurements of efficacy, but in animal models, high-grade disinfection (HLD) kills more than 90% of bacteria, viruses, and other pathogens. This intermediate stage of disinfection is registered by the EPA as a tuberculosis pathogen and kills mycobacteria as well as most viruses and bacteria. It has been killed by high sterilization rates, as found in animal models, as well as by a variety of other antibiotics and antibiotics - resistant bacteria and viruses. These intermediate stages of infectious diseases are registered by the EPA as tuberculosis pathogens and kill all but the most virulent strains of the tuberculosis bacterium, the bacterium tuberculosis. Disinfectants have three classifications of disinfectants based on the ability of the product to kill certain organisms. Low-concentration disinfection kills viruses and bacteria, while chemicals with germs are registered as tuberculosis agents by the US Environmental Protection Agency (EPA). High-level disinfection is caused by the removal of chemical germs and kills organisms with a high proportion of bacterial spores. These chemicals have been registered by the EPA as hospital disinfectants and kill all but the most virulent strains of tuberculosis, the bacterium tuberculosis. Disinfectants have three classifications of disinfectants, whereby the active substances are classified according to concentration as intermediate stages. Disinfectants have displaced the intermediate stage in which the effect of an active ingredient changes from low to high in concentration. The three highest levels of all three disinfectants are based on their ability to kill microorganisms, including resistant bacterial spores. Interim disinfection inactivates Mycobacterium tuberculosis var. The by-products kill certain organisms, but they do not necessarily infect all the microbes that can kill spores, and some microbes can be killed by the spores themselves. A very careful procedure should be followed when selecting disinfectant materials and disinfection methods. A careful review of the manufacturer's specifications for each product provides a good basis for selecting the appropriate disinfectant for the specific type of bacteria or bacteria in the environment and for the right amount of water. Although disinfectants further reduce the number of bacterial colonies compared to conventional detergents, their effectiveness depends on many factors, including the amount of water, the concentration of the disinfectant and the presence of other contaminants in the environment. Studies have also shown that the contamination can be transmitted to the person holding the cloth if the cleaning method does not remove it from the surface or if a cloth is used to wipe it. According to the CDC, it is important to have proper ventilation when applying bleach to a surface, and always ensure that the product does not exceed its expiration date. Disinfectants vary considerably in their ability to weed out germs, which worries livestock farmers. The most commonly used disinfectants are not as effective as those that have adopted an environmentally friendly way of life. Formaldehyde acts on most spores, but is now considered to be potentially carcinogenic and is not a practical disinfectant.