What are different types of viruses?

Viruses are small pieces of genetic material, wrapped in protein envelopes that are capable of kidnapping the cellular apparatus of plants, animals and bacteria for self -criticism. They are extremely small, much smaller than bacteria. A typical virus is between 10 and 300 nanometers (billion meters) size, while typical bacteria are larger than micrometer (millionth meter).

Virology watched only about 30,000 types of viruses, although there are probably millions. Classification of viruses is made more difficult by lack of fossil evidence - viruses fossilized - and controversy about whether they are living organisms or not. Unlike other organisms, new viruses sometimes appear from the genomes of already existing organisms, making it difficult to create coherent family trees. However, this does not prevent the virologists from trying. This classification scheme is inspired by Linnaean by a classification system for other organisms. It contains five levels: order, family, subfamily, genus and species. Recognition of the order level is very recent, with the name ofby sucking only three orders. Most viral families have not yet been placed in any order. ICTV currently recognizes only about 1,550 species.

As an example of a chicken smallpox virus, Varicella zoster, it belongs to the family Herpesviridae , stimulating Alphaheherpesvirinae, Rod and lacks categorization based on the order.

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The second classification scheme, Baltimore Classification, developed and named after the Nobel Price, which is won by biologist David Baltimore, is commonly used in conjunction with the ICTV system. The Baltimore classification system categorized viruses based on what they are made of. Here is the scheme:

group i two -session viruses of DNA II III Double -collision viruses RNA IV (+) Single -threshing viruses of RNA v (-) single-threaded viruses RNA VI VII Two -collision Back Rear Rear Rear Reworm

By using these two classification systems, virologists can actually have a clue about what they are talking about. Another traditional classification system is based on what type of organism they infect: there are viruses specific to plants, animal -specific viruses and bacteria specific to bacteria, called bacteriophages. Depending on the host, the virus has evolved into infection, with another Physical Structure.