Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Viral phylodynamics wikipedia , lookup
Ebola virus disease wikipedia , lookup
Bacteriophage wikipedia , lookup
Negative-sense single-stranded RNA virus wikipedia , lookup
Social history of viruses wikipedia , lookup
Oncolytic virus wikipedia , lookup
Plant virus wikipedia , lookup
Introduction to viruses wikipedia , lookup
Virus quantification wikipedia , lookup
Henipavirus wikipedia , lookup
Viruses A virus is a microscopic particle that gets into a cell, takes over its functions, and often destroys it while reproducing. Extremely small. Millions of virus can fit into a bacteria. Can change forms rapidly (mutates). Can’t live on its own, must have a . host cell to reproduce Viruses They force their host to become virus factories rather than creating healthy cells. Viruses genetic material can be DNA or RNA Living things vs Viruses Both contain protein, genetic material, and they can reproduce. Viruses cannot eat, grow, break-down food, or use oxygen. They must depend on their HOST Cell Four Shapes of Viruses • Crystals- polio virus • Cylinders- tobacco moasic virus • Spheres- influenza and HIV virus •Spacecraft- attacks bacteria only- Bacteriophage Crystal shaped virus Cylinder shaped virus Sphere shaped virus Spacecraft shaped virus Spacecraft shaped virus- Bacteriophage HIV virus sphere shaped One shape of Flu virus Lytic Cycle • Virus joins to host cell using similar receptors. • Virus injects its genetic material into the cell (injects just like a needle). • Virus genes take over the cell and make viruses immediately. (virus factory). • Virus breaks out of the cell (usually killing it) and infecting many other healthy cells. • Virus cycle begins again. Lysogenic Cycle • Virus joins to the host cell. • Injects its genetic material. • Lays dormant inside the host cell. Does not make virus cells right away. • Takes over the cell sometime later and the Lytic Cycle begins. • The cycle begins again. Antibiotics vs Antiviral Antibiotics – bacteria to fight other bacteria. Kills good and bad. Antiviral medicines stop the reproductive cycle if viruses and are not always 100% effective because viruses change form so much. Vaccinations A killed or weakened pathogen introduced into the body to allow the body to gain immunity (resistance) against it. (polio, shingles, chickenpox, rabies, etc.) How to prevent viruses The best way to prevent virus infections is to not get them to begin with. Wash hands often, do not use other personal items, keep vaccinations up to date, and just good general hygiene. Vaccination is the best way and washing hands is best low cost way to prevent viruses.