Viruses are generally considered to be amongst the smallest bioactive particles; dating back to the original observations, including those of luminaries such as Ivanosky and Beijerinck, size has always been at issue within the definition, a tradition that continued for many years. It was thus a surprise to the scientific community in the early 2000s when French scientists demonstrated that a particle, previously thought to be a bacterium, was indeed a virus. The discovery of the Mimivirus and the other “giants” that have followed, including Mamavirus, Pandoravirus, Faustovirus, and Mollivirus, has blurred the definition of what constitutes a virus and, indeed, the boundaries between viral particles and cellular life.
Original Source [2]
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/standing-shoulders-giant-viruses-five-lessons-learned-about-large-viruses-infecting
[2] http://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1005752
[3] http://admin.indiaenvironmentportal.org.in/category/author/steven-w-wilhelm
[4] http://admin.indiaenvironmentportal.org.in/category/author/samantha-r-coy
[5] http://admin.indiaenvironmentportal.org.in/category/author/eric-r-gann-et-al
[6] http://admin.indiaenvironmentportal.org.in/category/journal/plos-pathogens
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/viral-diseases
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/micro-organisms
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research