- Viruses are infectious agents made up of genetic material. (DNA or RNA) that is surrounded by a protein coat (CAPSID) .
- Viruses incorporate themselves into cells .
- Viruses are tiny and can only be seen with an election microscope .
- Viruses can only reproduce and carry our metabolic functions when they are inside a host cell.
- Viruses can remain dormant for a long time, either outside or inside of the host cell. (eg. chicken pox) .
- Viruses cause diseases by infecting a host cell. .
- To produce new copies of a virus, it must use the host cell's reproductive "machinery." Viruses can then leave the.
host cell, killing it and proceed to infect other cells within the host organism.
- Viruses can infect plants, animals and bacteria. .
VIRAL INFECTION AND REPRODUCTION .
- Lytic Cycle: process which the virus multiplies and destroys the host cell. .
- Lysogenic Cycle: process which the virus multiplies with the host cell and gets passed into the daughter cells.
- Some Examples of Illnesses: AIDS, Chicken Pox, Small Pox, Hepatatis .
- Protection against and treatment of viral infections .
- Good health.
- Vaccination .
- Antibiotics cannot be used to treat viral infections, but there are anti viral meds that can treat it.
VACCINES AND VACCINATION .
- Vaccines protect us from serious effects of infectious diseases, by preparing our body to defend itself against the.
infectious agent, by building immunity. .
- Importance of vaccination- Immunized children help protect the health of the community, it helps stop the spread.
of the disease among those who are vulnerable.
- Types of Immunity: .
A) Innate/ Natural Immunity: born with it, many viruses that affect other species do not affect them. .
B) Passive Immunity: receiving antibodies from another source. Lasts for a short period of time because no immune.
response is generated. eg: maternal antibodies .
C) Adaptive Immunity: Develops throughout our lives, results to pathogens.