Viruses

Viruses

Virus
1. An obligate, intracellular parasite
  1. Obligate intracellular parasite because viral replication depends completely on host cell
2. Viruses are not: 1. Cells or made up of cells 2. Cannot manufacture own ATP, Amino Acids, nucleotides, and protein
3. Virions: Infectious viral particles (Basically a whole parasite, because they are not considered organisms)
  1. Epidemic: Disease that rapidly infects a large number of individuals over a widening area Ex. Native Americans dying from smallpox
    1. Pandemic: an epidemic that is worldwide Ex. 1918-1919 Influenza Outbreak 50 million people died
      1. HIV (Human immunodeficiency virus)
        AIDS (Acquired immune deficiency syndrome)
        HIV attacks the human immune system, specifically the Helper T cells. HIV kills the Helper T cells which will cause the human to not be able to fight off pathogens
        Young children will typically die of HIV, but older (late teens and up) usually will die of AIDS
  2. Virulent: Viruses that tend to cause severe disease
  3. Viruses are very small (0.1 micrometers) Eukaryotic cells are roughly 7 micrometers
Lateral Gene Transfer: Viruses can introduce foreign genes into cellular genomes by picking up genes from one organism and shuttling them to another
1. 5-8% of human genome is remnants of viral genome

Resource summary

	Created by Kane Carstens almost 7 years ago