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.
Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites and can spread between individuals. What is an infectious disease? Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites. Microorganisms that cause disease are collectively called pathogens. Pathogens cause disease either by disrupting the bodies normal processes and/or stimulating the immune system to produce a defensive response, resulting in high fever, inflammation and other symptoms.