Sanitizer is an agent that reduces the microbial population to safe levels as judged by public health requirements. Germicide is an agent that kills the growing forms but not necessarily the resistant spore forms of germs. Gemicides are commonly used for all kinds of germs. Bactericide is an agent that kills bacteria. The terms fungicide virucide & sporicide refer to agents that kills fungi, viruses and spores respectively. Bacteriostasis has a condition in which the growth of bacteria is prevented, fungistatic describes an agent that stops the growth of fungi. Antimicrobial agent which interferes with the growth and metabolism of microbes.