Microbes are Good and Bad Effect on our Health, survival from Bacteria

People who are pedantic in such matters may use the term "bactericide" for synthetic antibacterial drugs and "antibiotics" for antibacterial substances synthesized by living organisms, such as fungi and soil bacteria.
Archaea Bacteria-like organisms that diverged from true bacteria early in the evolution of life on Earth. Some of them are famous for their ability to withstand very high temperatures, others for their ability to release methane. Among the archaea, not a single pathogen is known, but some of them settle in our mouth and intestines. When I talk about bacteria in general, I include the archaea for simplicity.
Virus Infectious particles consist of genetic material (DNA or RNA) enclosed in a protein coat. In the strict sense, viruses are not alive but can cause disease if they enter cells and their genetic material switches the tick to produce new viral particles. Bacteriophages are viruses that infect bacteria, so they are given special attention in this book.
A loose term for any microorganism. microorganisms. Microscopic organisms include both prokaryotes (bacteria) and eukaryotes, including parasitic ones fungi (causative agents of thrush, ringworm, and other diseases), and protists (causative agents of malaria, giardiasis, and the like]. Some scientists include viruses here, but I do not, because viruses are not organisms in the sense that they are not living.