References. 1  Shmerling RH. 2  LeBlond RF, et al., eds. 3  Muscle cramps. 4  Sprains, strains and other soft tissue injuries.
Microorganisms can be, according to their characteristics, divided into several groups: 1  bacteria, viruses, certain fungi and parasites. 2  pathogenic (capable of causing disease), non-pathogenic, and opportunistic (causing disease when they have an opportunity, like in people with low immune system).xamples of bacteria pathogenic for a human are: 1  Staphylococcus aureus, causing skin infections, pneumonia, infection of the heart valves, etc. 2  Streptococcus pyogenes, causing âstrep throatâ, cellulitis, etc. 3  Neisseria gonorrheae, causing gonorrhea.
Microorganisms, also called microbes, are extremely tiny organisms that can only be seen under a microscope. Microorganisms are one of the most diverse organisms and they include bacteria, fungi, archaea, protists, green algae, plankton and amoeba.Some scientists also classify viruses as microorganisms.Most microorganisms are single-celled, but few varieties are also multi-cellular. Microorganisms can be found virtually in every part of Earth from deep sea vents, hot springs, deep buried rocks to high up in the atmosphere.ome scientists also classify viruses as microorganisms. Most microorganisms are single-celled, but few varieties are also multi-cellular. Microorganisms can be found virtually in every part of Earth from deep sea vents, hot springs, deep buried rocks to high up in the atmosphere.