The smallest virus as of 2014 belongs to a group of viruses known as parvoviruses. These spherical viruses are about 18 nanometers in diameter and can only be seen through an electron microscope. To put that size in pers... More »

A known specific pattern of virus code is also known as the virus signature. Antivirus programs are able to detect viruses by their known virus signatures or patterns of virus code. More »

Archaea, bacteria, Protista, fungi, viruses and microbial mergers are divisions that contain microorganisms. Most microorganisms are single-celled organisms. Baker's yeast and fission yeast are unicellular microorganisms... More »

Microbiological contaminants are infectious materials, such as bacteria, mold, fungi and viruses. These contaminants, which are often found in food and water, can cause serious illnesses. More »

By maintaining homeostasis, organisms remain healthy, strong and stable, with protection from the attacks of foreign organisms, such as viruses, bacteria and fungi. Homeostasis enables organisms to remain balanced while ... More »

Biological mutant agents are substances that change the genetic material of organisms, such as DNA, and include certain chemicals and rays, such as ultraviolet radiation, X-rays and gamma rays, along with viruses and bac... More »

A virulent virus causes symptomatic or severe disease, while temperate, or non-virulent, viruses rarely cause any disease symptoms at all. Influenza viruses are virulent, causing quick and severe flu symptoms, while temp... More »